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  • Fisheries  (283)
  • LUNAR AND PLANETARY EXPLORATION
  • Inorganic Chemistry
  • Tehran, Iran  (171)
  • National Fisheries Resources Research Institute (NaFIRRI)
  • 1
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16556 | 6 | 2016-02-19 09:17:14 | 16556 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-06
    Beschreibung: Between July 2005 and February 2008, ten Catch Assessment Surveys (CASs) were conducted at 54 pre-selected fish landing sites in the Ugandan part of Lake Victoria comprising approximately 10% of all landing sites in each of the 11 districts sharing the lake. The CASs were conducted following regionally harmonised Standard Operating Procedures (SOPs). This report covers the CAS conducted in February 2008 and puts into context the trends generated by results of the previous surveys. The catch rates of Nile perch in gillnetting boats with motor/sail, reduced from 26.9 kg boat-1 day-1 in August 2007 to 22.8 kg boat-1 day-1 in February 2008. Whereas the catch rates of paddle Sesse boats remained more or less the same as in August 2007. The Nile perch catch rates of the long line fishery of the boats using motor/sail was similar, 35 and 36 kg boat-1 day-1 in August 2007 and February 2008 respectively but the catch rates of paddle Sesse boats using long lines showed some more increase from 19 to 22 kg boat (-1) day (-1). In the tilapia fishery, the catch rates of the parachute boats using gillnets showed further decrease in a row from 12.6 kg boat-1 day-1 in December 2006, 11.6 kg boat-1 day-1 in March 2007, 11.2 kg boat-1 day-1 in August 2007 and 10.0 kg boat-1 day-1 in February 2008. The overall impact of reduced catch rates in the predominant effort groups, e.g. gillnetting boats using motor/sail in the Nile perch fishery and Parachute boats using gillnets in the tilapia fishery overshadowed the increases in less dominant effort groups and resulted in the lowest monthly catch estimates recorded in the surveys conducted since 2005. Whereas there was a clear downward trend in the Nile perch catch rates of boats using gillnets, which corroborates with the information of declining stocks from the recent Acoustics surveys, the catch rates in the long line fishery remained stable and even somewhat increasing in the last four surveys. The factors that maintain high catches against reduction of fish biomass in the long line fishery and their effects on sustainability of the Nile perch fishery should be investigated further. The Mukene fishery, characterised by large fluctuations in the catch rates did not show much change in the last two surveys in August 2007 and February 2008 and the annual catch estimates showed an overall increase of 7% from 2005 to 2007. The Mukene fishery in the Ugandan waters of Lake Victoria remained a near shore fishery in which paddle Sesse boats using small seines or scoop nets were the dominant craft.
    Beschreibung: Implementation of a Fisheries Management Plan (IFMP) Project for Lake Victoria
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: 38
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17184 | 4230 | 2015-06-13 18:17:59 | 17184 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: The purpose of this output was to use the results of the baseline and participatory diagnostics analysis to develop alternative innovations for agricultural production, natural resource management and food security.The farming systems in the project areas were analysed to identify the innovations that communities had been using for agricultural production, natural resource management and food security. The innovative strategies were examined for their contribution to sustainable agriculture, food security and natural resource management. Comparative analysis of the agricultural productivity, food security and natural resource management in the different areas where the innovations have been put in place was undertaken.The best practices would be identified, which should be scaled-up, modified orsustained. The willingness and perceptions of the farmers to adopt the innovations would then be assessed.
    Beschreibung: First Technical Progress Report, January – December 2010
    Schlagwort(e): Agriculture ; Fisheries ; Health
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    Format: 54
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  • 3
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja,Uganda
    In:  http://aquaticcommons.org/id/eprint/17204 | 4230 | 2015-06-13 17:24:23 | 17204 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: This report gives the baseline information specifically on water quality (physical/chemical, nutrient and phytoplankton biomass status) of the open part of the lake, a river flowing into the lake and a lagoon, within Butiaba-Wanseko area.Oil and gas exploration in the Albertine Graben are on-going activities by Tullow Oil Plc, and Heritage Oil and Gas (Heritage). Part of the activities involve 2-D TZ seismic surveys in exploration area Block 2 (Butiaba-Wanseko area) in Buliisa District. A study of the transition zone (basically along the shoreline was undertaken by National Fisheries Resources Research Institute (NaFIRRI) on behalf of Environmental Assessment Consult Ltd (EACL) during September 2007. A major objective of the study was to carry out a baseline survey of the fisheries and water quality of the lake shore between Wanseko and Butiaba prior to the proposed 2-D Seisimic investigation.
    Schlagwort(e): Fisheries ; Limnology
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: 11
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17234 | 4230 | 2016-02-23 09:02:05 | 17234 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The annual report presents present activities and achievements for the reporting year 2011/2012. The Objectives of NaFIRRI are highlighted below:a) Generation of knowledge and technologies of strategic importance for the management, development and conservation of fisheries resources and water quality.b) Establishment and management of the human, physical and financial resources of the National Fisheries Resources Research Institute.c) Provision of technical backstopping and capacity building to the Ministry of Agriculture, Animal Industry and Fisheries (MAAIF), Zonal Agricultural Research and Development Institutes (ZARDIs) and other agencies dealing in fisheries research and water quality.d) Development and management of fisheries research information and ensuring collaboration with stakeholders.e) Planning, monitoring and evaluation of all fisheries research programmes undertaken by the institute to ensure conformity with national research strategy.f) Ensuring the quality of knowledge and technologies developed, multiplied and disseminated through uptake pathways.g) Generation of periodic reports on fisheries and water quality research programmes to National Agricultural Research Council (NARC) and other stakeholders.h) Establishment of sustainable linkages and partnerships with local, regional and international research bodies.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 38
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17220 | 4230 | 2021-02-27 20:52:02 | 17220 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The study is prompted by the poverty that persisted among the fishing communities of lake victoria at time of considerable cash inflow into the fisheries development of fish processing industry. There has been need for understanding of the poverty and what strategies would be most appreciate for it's reduction.This study has attempted to respond to the needby identifying the nature and distribution of the poverty within the fisheries lake victoria,Uganda, the factor responsible for itand the options for poverty reduction intervention. The study examined the global and regional perspectives of poverty and wealth distribution, noting that wide disparities existed between the developed and the developing world and also between the developing countries themselves. A historical review of development policies and strategies revealed that while successive strategies were able to contribute to growth, their achievement towards poverty alleviation were less than satisfactory, hence the need forcontinually developing new strategies.A background to Uganda’s society and economy is provided, examining the demographic, political, environmental and economic conditions of the country. Uganda’s developmentstrategies are reviewed, highlighting the role of the Poverty Eradication Action Plan, Uganda’s main strategy for implementing the policy of poverty reduction and wealthdistribution. At the agricultural sector level, the Plan for the Modernisation of Agriculture has been formulated, followed by the National Fisheries Policy, aimed at providing a policy framework for the management and development of the fisheries.An appropriate definition of poverty was formulated, considered relevant to the situation ofLake Victoria. The dimensions of poverty included inadequate basic necessities, low education and health achievements, a sense of insecurity and exposure to risk. The research methodology was enhanced by the examination of the Lélé Model of the Poverty–Environmental Degradation problem, the World Bank Model of Poverty Causation and thesubsequent Lake Victoria Model developed in this study. It has provided a plan for the research, the consideration of criteria and a data collection plan. The data collectioninstruments included secondary data search, key informant interviews and a sample survey based on a structured questionnaire.The study identified all the four dimensions of poverty in the fisheries, provided poverty profiles with respect to the different activities, groups of people and regions in the fisheries, based on consumption poverty. Among the people identified to be in poverty were the fishing labourers, fishers of Oreochromis niloticus and those operating with non-powered boats. In the post-harvest fisheries, large proportions of processors involved in salting and sun-drying, market stall and bicycle traders were in the poverty category. The ethnic groups most affected included the Samia, Basoga and Bakenye while the Districts of Jinja, Bugiri and Busia had the highest proportions of fishers in the poverty category. With respect to the other dimensions of poverty, the study showed that educational achievement was low within the fishing communities. The health status was poor, due mainly to the prevalence of malaria, diarrhoea, bilharzia and HIV/AIDS. There was a sense of insecurity within certain sections of the fishing community, due to leadership weaknesses within the local as well as the Government institutions. Some community members operated in a state of risk because they were vulnerable to episodes of income, health and education. The causes of poverty in fisheries included weaknesses within the institutional and social environment, limitations in the technology available to the poor, resource degradation and unfavourable economic factors. The recommendations of the study for poverty reduction included strengthening of policies, developing links, improving capacities and increasing resources, to be applied at the levels of Central Government, Local Government and of the community. In view of the achievements of the methodology used on this study, involving reference to the models, it is recommended that future research should build upon this model approach, as it will continue to produce results, especially when attempting to forecast changes relating to interventions.
    Beschreibung: Lake Victoria Environmental Management Project (LVEMP)
    Schlagwort(e): Fisheries ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    Format: 99
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17235 | 4230 | 2016-02-19 09:42:44 | 17235 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The Mandate of the National Fisheries Resources Research institute (NaFIRRI) is to manage, promote and undertake applied and basic research of strategic and national importance in aquaculture, capture fisheries, water environment, socio-economics and marketing, information communication management and any emerging issues in the fisheries
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 29
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  • 7
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17284 | 4230 | 2016-03-04 08:58:43 | 17284 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The field survey was undertaken by NaFIRRI technical staff. The terms of reference for the survey were to make an assessment of the lake for possible cage fish farming. The survey was undertaken on the 26 August 2010 by a team composed of the several. The lake supports small subsistence fishing activities by the local communities livingaround it. Information from the local community indicates that the fish species/typesoccurring in the lake include the Ngege, Nile perch, the African catfish and the lung fish.The fishing crafts in operation are largely Dug-out and Bao Tatu canoes and the main fishing gears are nylon and monofilament gillnets, hooks and beach seines.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 8
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16650 | 4230 | 2015-04-10 17:42:29 | 16650 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-07
    Beschreibung: This report presents findings of the CAS conducted in the Ugandan waters of Lake Victoria in May 2011. The results of the previous eleven CASs conducted under the IFMP of the LVFO programme in July, August, September and November 2005; in March, August and December 2006; in March and August 2007; in February and December 2008; and March 2010 are included to show the emerging trends. The report also presents annual catch estimates for the Ugandan part of the lake from 2005 to 2011.Through these CASs, information is building up to show the emerging picture of fish production in the Ugandan waters of the lake. Similar surveys are conducted in the Kenyan and Tanzanian parts of the lake, which provide the lake wide perspective of fisheries production but this time not simultaneously as under the LVFO effort due to different sources and timing of funding. These data can now be utilised together with other Resource and Socio-economic Monitoring survey data for a stock assessment of the lake to provide a firm basis for planning and management of the fisheries resources.
    Beschreibung: World Bank
    Beschreibung: Agricultural Technology Agribusiness and Advisory Services (ATAAS)
    Beschreibung: Catch Assessment Survey jointly conducted by the National Fisheries Resources Research Institute (NaFIRRI), the Department of Fisheries Resources (DFR), and the districts of Busia, Namayingo, Mayuge, Jinja, Mukono, Buikwe, Buvuma, Wakiso, Kampala, Mpigi, Masaka, Kalangala and Rakai.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 45
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16648 | 4230 | 2015-04-10 18:12:42 | 16648 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-07
    Beschreibung: Lake Albert and Albert Nile are a major source of fisheries resources sustaining the riparian communities in Uganda and the Democratic Republic of Congo (DRC). Like all shared bodies of Uganda Lake Albert and Albert Nile fisheries are faced with immense exploitation pressure one time described as the tragedy of the commons. In Uganda, the lake is shared by five riparian districts namely: Buliisa, Bundibugyo, Hoima, Kibaale and Nebbi. The lake covers a total estimated surface area of 5,270 square kilometers with approximately 60% within Ugandan waters. It is located in the western part of the great rift-valley at an altitude of 618 m above Sea level. The central parts of the lake are characterized by steep escarpments whereas the northern and southern parts lie in a plain of the rift valley. The plains are gently sloping, resulting in shallow swampy inshore waters in many places. The major inflowing rivers are the Semliki and Kafu in the south, and the Victoria Nile at the northern tip. The lake has a diverse fish fauna with a gradient of multi-species fisheries in different parts of the lake.The overall objective of the Frame Survey was to provide information on the facilities and services at landing sites and the composition, magnitude and distribution of fishing effort to guide development and management of the fisheries resources of Lake Albert and Albert Nile.The specific objectives were to provide information on:a) The number of fish landing sites;b) The facilities available at the fish landing sites to service the sector including accessibility;c) The service providers especially fisheries staff at fish landing sites;d) The number of fishers;e) The number and types of fishing crafts and their mode of propulsion;f) The number, types and sizes of fishing gears used on the lake and their mode of operation.
    Beschreibung: National Environmental Management Authority (NEMA)
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 25
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  • 10
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16649 | 4230 | 2015-04-24 14:01:27 | 16649 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-07
    Beschreibung: A Catch Assessment Surveys (CAS) with the overall objective of generating information on the fish production and commercial value of the fisheries of Lake Albert and Albert Nile system was implemented by the National Fisheries Resources Research Institute (NAFIRRI) in collaboration with the Department of Fisheries Resources (DFR), Local Government staff (FOs) and BMU members at selected landing sites on Lake Albert (12 landing sites) and Albert Nile (26 landing sites) in July 2012.A total 622 and 313 boat days on Lake Albert and Albert Nile respectively were sampled for a period of 9 days. Results indicate an annual landing of 151,600 and 5,900 tonnes (t) of fish with an estimated beach value of 122.5 and 14 Billion (UShs) from Lake Albert and Albert Nile respectively. Over 80% of the catch from Lake Albert comprised the small pelagic species; Neobola bredoi (Muziri) and Brycinus nurse (Ragoogi) followed by Nile perch (6%). However, due to low market value of the small fishes and the high prices attached to Nile perch for industrial processing and export market, the contribution of the latter to beach value rose to 34% of the total. The contribution of the light fishery based on small pelagic species (B. nurse and N. bredoi) are insignificant on Albert Nile. Even if the small pelagic species may be present in the river system, a light fishery based on these two is yet to be developed. Proportionally, Albert Nile still remain a multispecies fishery with over 20 fish species harvested commercially. Interestingly, the Albert Nile fishery still remains primitive with simple crafts and gears (mainly dugout canoes, traps, and gillnets). This could suggest that the more developed the system becomes the higher the level of transformation in its fisheries leading to simplification, characterized by reduction in multispecies nature and dominance of few species.Illegal gears especially undersized gillnet of mesh size less than 4 inches were the most dominant in the Lake Albert and Albert Nile fisheries. They captured large quantities of immature fish particularly when used to target Nile perch, Bagrus, Nile tilapia, and large Barbus spp. Their impact when used to target the smaller species (Ragoogi, Angara & Ngasia) is yet to be evaluated. A specific study to analyze selectivity and impacts of these nets is a recommended. However, the dominance of 1.5” mesh sizes especially on Albert Nile to target Angara, Ngassia and Barbus, is definitely destructive to their fisheries and should be checked forthwith. In addition, there is an emerging fishing method locally referred to as “Salsio or Luzira” whereby fishers stay on the lake from 3 days up to 2 weeks without returning to the landing site. They carry with them food and salt for processing the catches on the lake, and in the case of Albert Nile on make shift shelters on islands and in the game park. They normally use gillnets of 3-3½ inch mesh size and caught mainly Nile perch & Bagrus (Pethi & Munama). On return they land several tons of fish. Most of these Catches are not captured in the estimates presented in our analyses since we target daily fishing boats. The possible impacts of this fishing method should be studied and appropriate action recommended.
    Beschreibung: ATAAS Project 5: Monitoring changes in stocks of the major commercial fish species in the five major water bodies of Uganda (Victoria, Albert, Kyoga, Edward and George)
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17147 | 4230 | 2016-02-27 15:59:45 | 17147 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: The survey covered by this report was undertaken between 6 th and 9th October 2009 as a follow-up on the during construction surveys of the Bujagali Hydropwer Project (BHPP). In addition to two pre-construction baseline surveys in April 2000 and April 2006, four monitoring surveys have so far been undertaken i.e. in September 2007, April 2008, April 2009 and the present one, in October 2009. The 2009 biannual monitoring surveys were conducted at an upstream and a downstream transect of the BHPP with emphasis on the following aspects: 1. water quality determinants 2. biology and ecology of fishes and food webs 3. fish stock and fish catch including economic aspects of catch and 4. sanitation/vector studies (bilharzias and river blindness)
    Beschreibung: Monitoring carried out by NaFIRRI nn behalf of Bujagali Energy Limited (BEL)
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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  • 12
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17187 | 4230 | 2016-02-26 17:11:45 | 17187 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: The result reported were from a monitoring survey no.8 undertaken between 6th and 10th April 2011 during construction period of the Bujagali Hydropwer Project (BHPP). Two pre-construction, baseline surveys in April 2000 and April 2006 were conducted and so far,durin construction phase of the project, seven monitoring surveys have been undertaken i.e. in September 2007, April 2008, April 2009,October 2009, April 2010, September 2010 and the present one, in April 2011. Since 2009 biannual monitoring surveys have been conducted at an upstream and a downstream transect of the BHPP with emphasis on the following aspects: Water quality determinants Biology and ecology of fishes and food webs Fish stock and fish catch including economic aspects of catch and Sanitation/vector studies (bilharzias and river blindness)
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 28
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17202 | 4230 | 2016-02-19 09:21:41 | 17202 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: Tullow Oil plc is to launch an onshore Early Production System (EPS) of oil drilling rated at 4,000 barrels of oil per day by 2009. The location of the EPS is in the Kaiso-Tonya area of Block 2 Oil Exploration Zone along Lake Albert within the Albertine graben. Tullow Oil plc contracted Environmental Resources Management (ERM) Southern Africa (Pty) Ltd in conjunction with Environmental Assessment Consult Limited (EACL) to undertake an Environmental Impact Assessment (EIA) for pre-construction and operation of the proposed EPS. ERM in association with EACL requested National Fisheries Resources Research Institute (NaFIRRI) to conduct a baseline survey of water quality and invertebrates in River Hohwa. This study was requested as part of an earlier baseline survey conducted at the Kaiso-Ngassa spit oil exploration area in Block 2. It was conducted at five selected sites (Fig. 1 & Table 1) within the Hohwa River basin in the Kaiso-Tonya Exploration Area 2. The study was pertinent because the targeted oil wells for EPS are upstream this river which drains the Kaiso-Ngassa valley into Ngassa lagoon.
    Beschreibung: Environmental Assessment Consult Limited (EACL)
    Schlagwort(e): Environment ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: 19
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17208 | 4230 | 2021-02-27 20:44:10 | 17208 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The purpose of the study was to investigate migratory movements of fishermen on lake victoria.To identify the cuases of fishrmen migration with a view to establishing the paterns of migration;determining season of migration and assessing the impacts of migration on fisheries management and development.
    Beschreibung: Implementation of a Fisheries Management Plan (IFMP)
    Schlagwort(e): Fisheries ; Sociology ; Lake Victoria Fisheries Research Organization ; LVFO
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    Materialart: monograph
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda.
    In:  http://aquaticcommons.org/id/eprint/17227 | 4230 | 2016-02-23 09:55:42 | 17227 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The fisheries of small lakes are important for producing fish for local populations not clear the larger lakes.The satelite support important fisheries and other economic activities like fishing water for domestic purpose and tourism besides socio-cultural functions.
    Beschreibung: Lake Victoria Environmental Management Project (LVEMP)
    Schlagwort(e): Fisheries ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    Format: 74
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17223 | 4230 | 2016-02-19 11:12:33 | 17223 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: postive transformation of the fisheries sector in Uganda has of recent been scatted by failure to mountain fish quality and safety,akey prerequiste for retaining and gaining fish markets.The social cultural study established the extent to which social cutural practices had affected the levels and the use of sanitation facilities,fish handling facilities and artisanal fish processing techniques and the factors that influenced these practices in the fishing communities of lake victoria.This information is of significance for the purpose of advocacy and mobilization of fishers in order to improve sanitation, fish handling and artisanal fishing processing situation in the fishing communities.
    Beschreibung: Lake Victoria Environmental Management Project (LVEMP)
    Beschreibung: This is LVEMP Socio-Economic Research Report, 6
    Schlagwort(e): Fisheries ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17144 | 4230 | 2016-03-01 14:25:04 | 17144 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: Following the commencement of construction works of a 250 MW hydropower plant at Dumbbell Island in the Upper Victoria Nile in September 2007, BEL requested NaFIRRI to conduct continuous monitoring of fish catches at two transects i.e. the immediate upstream transect of the project site (Kalange-Makwanzi) and the immediate downstream .transect (Buyala-Kikubamutwe). The routine monitoring surveys were designed to be conducted twice a week at each of the tWo transects. It was anticipated that major immediate impacts were to occur during construction, and these needed to be known by BEL as part of a mitigation strategy. For example, the construction of it cofferdam could be accompanied by rapid changes in water quality and quantity downstream of the construction. These changes in turn could affect the fish catch and would probably be missed by the quarterly monitoring already in place. Therefore, a major cbjective of the more regular and rapid monitoring was to discern immediate impacts of construction activities by focusing on selected water quality parameters (total suspended solids, water conductivity, temperature, dissolved oxygen and pH) and fish catch characteristics (total catch, catch rates and value of the catch)
    Beschreibung: Prepared for Bujagali Energy Limited (BEL)
    Schlagwort(e): Environment ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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  • 18
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17371 | 4230 | 2016-03-04 09:05:36 | 17371 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The Nabugabo lakes are an important source of affordable protein food inthe form of fish, income, water for domestic and commercial purposes(aquaculture farm and Hotels), handcraft materials (mats, hats, roof thatch) andfishing floats and rafts. Nabugabo lakes provide employment, income and exportearnings to Uganda that flow from the act of harvesting the fish. In Uganda thefisheries sector directly employs 350,000 people and indirectly 1.2 million people.In 2005, it is estimated that about 370,000 mt fish export (97-98% Nile perch)earned Uganda US $ 143 Million up from US $ 103 million in 2004 .and up fromUS $ 45 million in 1996. , making it almost become the first non' traditional exportcommodity. The Nabugabo lakes are also import for cultural values and fishspecies from these lakes are important in evolutionary studies. The fishery sectoris therefore very important in Uganda's socio-economic life. Despite the abovevalues to the communities and global biodiversity roles, the amount of fish caughtand the number fishing fleets operating on the Nabugabo lakes to guidemanagement of the lake are lacking. The fishery that exists in these lakes islargely for subsistence and commercial purposes specific for Lake Nabugabobased on introduced species (Nile perch and Nile Tilapia). The fish is caughtusing mainly gill nets and long line hooks.
    Beschreibung: On title page: Theme 3: Enhancing integrated management of natural resources Project : Generation of knowledge and technologies that ensure sustainable utilisation of fish stocks (capture fisheries)
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
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  • 19
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19334 | 4230 | 2020-09-07 21:42:41 | 19334 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-06-25
    Beschreibung: Rastrineobola argentea locally known as mukene in Uganda, omena in Kenya anddagaa in Tanzania occurs in Lake Nabugabo, Lake Victoria, the Upper Victoria Nile andLake Kyoga (Greenwood, 1966). While its fishery is well established on Lakes Victoriaand Kyoga, the species is not yet being exploited on Lake Nabugabo. Generally such smaller sized fish species as R argentea become important commercial species in lakes where they occur when catches of preferred larger-sized table fish start showing signs of decline mostly as a result of overexploitation. With the current trends of declining fish catches on Lake Nabugabo, human exploitation of mukene on this lake is therefore just a matter of time. The species is exploited both for direct· human consumption and as the protein ingredient in the manufacture of animal feeds.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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  • 20
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19341 | 4230 | 2020-09-07 22:06:21 | 19341 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-06-26
    Beschreibung: Decline in fish stocks and fish species diversity due to excessive fishing effort. 2. Use of destructive fishing gears and methods e.g seines, cast nets, of recent mono-filament nets, tycooning, etc. 3. Capture of immature fish. 4. Invasion by water hyacinth and floating sudds 5. Ineffective management of fisheries due to limited (reluctance) community participation in lake management affairs. 6. Of recent, illegal buying and selling of fish in the lake without landing deprives the department of statistics and also puts the owner of fishing vessels at risk. 7. Lack of coordination among fisheries departments of districts of Kyoga basin (Le. differences in policies from districts to district -laxity in law enforcement). 8. Inadequate investment skills among fishers . .9. Political interference -creation of illegal landings 1a.llI-facilitated field staff. makes monitoring difficult and kills morale • . 11. Pollution and degradation of• the fish habitat from construction works and agro-cbemicals. 12. Poor infrastructure 13. Lack of control of licensing by fisheries staff 14.The rising water levels in the lake cause serious impacts to the fishing expeditions by way of destruction of the fishing gears and sudden blockages of landing site entries. 15. Some areas at the •shoreline show high degree of sedimentation. These areas being breeding areas for fish are seriously interfered. 16. Water hyacinth is still highly patched in some fishing grounds
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: conference_item
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  • 21
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19326 | 4230 | 2020-09-07 21:03:02 | 19326 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-06-25
    Beschreibung: Productivity processes may be defined as involving the conversion/mobilisation of energy for storage into various biological forms. The major biological (forms relevant to this presentation are bacteria, algae aquatic macrophytes, invertebrates and fish. The non living form is Deritus.The purpose of this paper is to outline in generalised terms, the processes through which energy is mobilised from the various transitional storage towards fish production
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 22
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19337 | 4230 | 2020-09-07 21:44:19 | 19337 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-06-25
    Beschreibung: Fisheries are based on stocks of wild animals living in their natural environment stock is a sub-set of one species having the same growth and mortality parameters, and inhabiting a particular geographic area and has little connection with adjacent groups. The fish stocks are affected by man's activities and the success of the fisheries depends critically on the state of the fish stocks. Decision-makers need scientific advice about the state of the fish stocks. The science of stock assessment is concerned with provision of this advice
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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  • 23
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19346 | 4230 | 2020-09-07 22:02:29 | 19346 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-06-26
    Beschreibung: Overview: Fish distribution patterns•Definition of habitatSpatial dimensions of habitatstemporal dimensions of habitatsFish Movements and MigrationsFactors affecting suitability of fish habitatsHabitat structureThe influence of watershed characteristics on fish habitatsFish habitat conservation issues for Lake KyogaThe way ahead for fisheries management for all water bodies Comprehensive policy interventions at local-district and national levels for lakes
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: conference_item
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  • 24
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20153 | 4230 | 2016-02-25 13:06:39 | 20153 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Evolution of fisheries research and FIRRIThe earliest approach to fisheries research in Uganda dates from the first fisheries survey of Lake Victoria by Michael Graham between 1927 and 1928 (Graham,1929). Based on references to the rich fisheries that were reported to Graham, itappears that during the 18th Century, catch per net per night averaged 300 tilapia,a revelation that led Graham to conclude that Lake Victoria is a tilapia lake. The"tilapia" later came to be known as Tilapia esculenta and T variabilis(Oreochromis esculentus and O. variabilis) respectively.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 3-14
    Format: 321
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  • 25
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20155 | 4230 | 2016-02-25 13:16:58 | 20155 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: The first fishery survey of Lake Victoria was conductedbetween 1927 and 1928 (Graham 1929). Atthat time,the lake had a diverse fish fauna and the fishery wasdominated by two endemic tilapiine cichlids;Oreochromis esculentus (Graham 1929) and O.variabilis (Boulenger 1906). There were a number ofother species such as Protopterus aethiopicus Heckel1851, Bagrus docmac (Forsk.) 1775, Clarias gariepinus(Burchell), Barbus species, mormyrids, Synodontis spp,Schilbe intermedius (Linn.) 1762 and Rastrineobolaargentea Pellegrin, 1904 that were also abundant inthe lake most of which made a significant contribution tothe fishery (Graham 1929, Worthington 1929, 1932,Kudhongania & Cordone 1974). Haplochromine cichlidswere represented by at least 300 species more than99% of them endemic (Greenwood, 1974; Witte et al.,1992 a & b). The fishery of Lake Victoria was similar tothat of lakes Kyoga and Nabugabo (Worthington 1929;Trewavas 1933; Greenwood 1965, 1966; Beadle 1962,1981).There were also important fisheries on the inflowing rivers of Lake Victoria, the most important of which were Labeo victorianus and Barbus altianalis (Cadwallader 1965). The small sized species notably Rastrineobola argenteaand haplochromines cichlids were not originally commercially exploited.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 30-37
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  • 26
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20159 | 4230 | 2016-02-25 13:27:57 | 20159 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Fishing communities that have exploited the resource forgenerations constitute the main stakeholder groups in thefisheries of Lake Victoria. Several studies have examinedUganda's Lake Victoria fishing communities andcharacterised key stakeholders at community level over thelast decade (SEDAWOG 1999a and b; Geheb 1997;FeSEP 1997; Kitakule 1991).The communities are made up of scattered settlements at the shores and on islands.The categories of people living in these communities include fishers who consist primarily of large numbers of male youths who provide labour to boat and gear owners.There are resident and non-resident fish traders who after securing their supplies at the beaches, depart for their market destinations. In addition, there are fish processors,mostly operating traditional and improved smoking kilns. Many other people, dealing in provisions and supplies also stay at the beaches, their activities depending on thelevel of fish catch. The fishing communities of Lake Victoria, Uganda, include auxiliary livelihood activities such as boat building, net repairing and transportation; bait supply and beachside kiosks, video halls and retail shop business. Other economic activities are brick making, charcoal burning/wood trade, farming and livestock keeping.
    Schlagwort(e): Fisheries ; Sociology
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 220-232
    Format: 321
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  • 27
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20160 | 4230 | 2016-02-25 13:30:27 | 20160 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Most of the earth's ecosystems are experiencing slight tocatastrophic losses of biodiversity, caused by habitatdestruction, alien species introduction, climate change andpollution (Wilcove et al., 1998). These human effects haveled to the extinction of native fish species, the collapse of their populations and the loss of ecological integrity and ecosystem functioning (Ogutu-Ohwayo & Hecky, 1991;Witte et al. , 1992a; Mills et al., 1994; Vitousek et al., 1996).Food webs are macro-descriptors of community feedinginteractions that can be used to map the flow of materialsand nutrients in ecosystems (Jepsen & Winemiller, 2002).Comparative food web studies have been used to address theoretical questions such as 'does greater trophic connectivity increase stability?' (Cohen et al., 1990), and 'does the number of trophic levels increase with productivity?' (Briand & Cohen, 1987). Answers to such questions have obvious applications for natural resources management. From a multi-species fisheries standpoint, there is a need to understand consumer-resource dynamics within complex trophic networks.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 119-127
    Format: 321
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  • 28
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20156 | 4230 | 2020-09-07 16:40:28 | 20156 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Until the 1970s, Lake Victoria had a multi-species fisherydominated by the tilapiine and haplochromine cichlids.There were important subsidiary fisheries for more than20 genera of non-cichlid fishes, including catfishes(Bagrus docmak, Clarias gariepinus, Synodontis sppand Schilbe intermedius), the lungfish (Protopterusaethiopicus) and Labeo victorianus) (Kudhongania andCordone 1974). Stocks of most of these speciesdeclined and others disappeared following theintroduction of four tilapiines (Oreochromis niloticus,Oreochromis leucostictus, Tilapia rendalli and Tilapiazillit) and Nile perch (Lates niloticus) during the 1950s.Since then the commercial fishery in the Uganda portion of Lake Victoria has been dominated by the Nile perch, Nile tilapia (Oreochromis niloticus) and the native cyprinid species, Rastrineobola argentea (Mukene).
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 41-48
    Format: 321
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  • 29
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20158 | 4230 | 2016-02-25 13:25:15 | 20158 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Rastrineobola argentea locally known as mukene inUganda, omena in Kenya and dagaa in Tanzania occursin Lake Nabugabo, Lake Victoria, the Upper VictoriaNileand Lake Kyoga (Greenwood 1966). While its fisheryis well established on Lakes Victoria and Kyoga, thespecies is not yet exploited on Lake Nabugabo.Generally such smaller sized fish species as R. argentea become important commercial species in lakes where they occur when catches of preferred largersized table fish start showing signs ofdecline mostly as a result of overexploitation.With the current trends of declining fish catches on Lake Nabugabo, human exploitation of mukene on this lake is therefore just a matter of time. The speciesis exploited both for direct human consumption and as the protein ingredient in the manufacture of animal feeds.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 93-105
    Format: 321
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  • 30
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20162 | 4230 | 2016-02-25 13:32:49 | 20162 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: The success of fisheries management depends very much on the effectiveness of the legal framework in use. A historical perspective of the fisheries of Lake Victoria, Uganda, suggests that fisheries management has not been very successful. This chapter reviews the legal framework with a view to assessing its impact on fisheries management on Lake Victoria, Uganda
    Schlagwort(e): Fisheries ; Law
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 233-243
    Format: 321
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  • 31
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20183 | 4230 | 2016-02-26 15:44:58 | 20183 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Of all the great lakes, Lake Victoria has the highest population concentration on its fringes. This has resulted into serious human impacts on the ecosystem through intense agricultural activities (cultivation, livestock and over fishing), sporadic settlements, urbanization and industrial establishments. The consequences have been loss of animals and plant life, deforestation and general land degradation, pollution, loss of water quality and clean air. Aquatic life has become endangered and less guaranteeing to continued fish production. Awareness workshops and general talks have been done to a few selected communities by the lakes landing sites and in the catchment area to mitigate the deteriorating environmental conditions. Naturally the situation calls for reversal to the increasing stress of the ecosystem. As a result, every water body surveyed put forward some mitigation suggestions
    Beschreibung: On title page: The Ugandan Version
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 20-26
    Format: 90
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  • 32
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20179 | 4230 | 2016-02-25 15:41:36 | 20179 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Fresh water and fish are important to the people wholive in the Lake Victoria region therefore the quality ofthe water and fish is of major importance (Johnson &Odada, 1996). It is well known that dirty water and spoiltfish can lead to poor health and lower standards of living,and that quality can be affected by the pollution in theenvironment.Even though Lake Victoria is very large, it is relatively shallow and the water remains in the lake basin for a long time (Bootsma & Hecky, 1993). There are a number of environmental issues in Lake Victoria, including water hyacinth~over-population and increased farming causing problems with the lake ecosystem. All these factors combine to keep contaminants within the lake for long time, which will lead to gradually increasing concentrations in the lake.Pollution is a term that covers a wide variety of chemicals and physical changes and their adverse effects on the environment. Here we focus on contaminants, which are unwanted chemicals introduced to the environment. Contaminants include a very wide variety of chemicals, both man-made and natural, for example, mercury, pesticides and herbicides, heavy metals, and natural plant and algae toxins. Many contaminants do not always lead to adverse effects immediately, but can gradually induce long-term problems leading to chronic illnesses and physical damage. A few contaminants have very rapid impacts resulting in immediately obvious changes such as death or injury.Sources of contaminants are varied. Contaminants can get in the lake by the way of agricultural treatment of crops near the lake, industrial effluent, intentional introduction such as fish poisoning byfishermen, natural sources such as heavy metals from particular types of rocks, and even some plants naturally release their toxins. Contaminant sources are not always found near Lake Victoria.
    Schlagwort(e): Fisheries ; Pollution
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 207-218
    Format: 321
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  • 33
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20231 | 4230 | 2016-02-26 15:53:45 | 20231 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Biological diversity of an ecosystem is considered a reliable measure of the state of health of the ecosystem. In Uganda's large lakes, the Victoria and Kyoga, the past three decades have been characterized by profound changes in fish species composition following the introduction of the piscivorous Nile perch (Oguto-Ohwayo 1990). Over 300 haplochromine cichlid species comprising a wide range of trophic groups were lost along with a host of non-cichlid fishes which occupied virtually all available ecological niches and in the lakes (Witte 1992). A second major ecological event has been the gradual nutrient enrichment of the water bodies (eutrophication) from diffuse and point sources, while at the same time pollutants have also gained entrance into the water systems in pace with indusfrial development and human population increases in the lake basins. Eutrophication and pollution have drastically altered the physical and-chemical character of the water medium in which different fauna and flora thrive. In Lake Victoria these alterations have resulted in changes of algal species composition from pristine community dominated by chlorophytes and diatoms (Melosira etc) to one composed largely of blue-green algae or Cyanobacteria (Microcystis, Anabaena, Planktolyngbya etc) (Mugidde 1993, Hecky 1993).
    Beschreibung: On title page: The Ugandan Version
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 39-65
    Format: 90
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  • 34
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20235 | 4230 | 2016-02-26 16:42:05 | 20235 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Introduction of exotic fish species especially the Nile perch Lates niloticus, is believed to be responsible for the decline of fish species diversity in lakes Victoria, Kyoga and Nabugabo.About 60% of the haplochromine cichlids are thought to have become extinct from L. Victoria due to predation by the Nile perch. However there are many lakes satelite to the lakes Victoria and Kyoga basins which still have fish fauna similar to that of the main lakes. many of the satellite lakes are separated from the main lakes in, which Nile perch was introduced by extensive swamps that provide a barrier to Nile perch .A survey was carried out in a number of these satelite lakes and an inventory made of existing fish species. Their distribution and relative abundances were also determined. The lakes studied included Nawampasa, Nakuwa,Kawi Lamwa Gigate, Nyaguo, Agu, Nabugabo. Kayanja, Kaytigi, Mburo, Kachera and Wamala.Some habitats within the main lakes Victoria and Kyoga, especially those with rocky outcrops· and macrophyte cover that provide refugia for endangered species from Nile perch,were also surveyed) Various stations along the River Nile were also sampled to quantify the fish species that are still resent. Kyoga minor lakes were found to have the highest number offish species especially of haplochromine cichlids. Many haplochromine trophic groups that were thought to be extinct from 1. Victoria still occur in these lakes.!Some of the satellite lakes, especially lakes Kayugi, Mburo and Kachera still contain .healili populations of oreochromis. Iesculentus that could be used as brood stock in fish farming. Many of these lakes should .I ( Itherefore be protected for conservation offish species diversity
    Beschreibung: On title page: (The Ugandan Version)
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 86-106
    Format: 90
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  • 35
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20247 | 4230 | 2016-04-04 11:43:03 | 20247 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: The results reported on were from a monitoring survey No. 10 undertaken between 23 rdand 29th April 2012 during construction period of the Bujagali Hydropower Project(BHPP). Two pre-construction, baseline surveys in April 2000 and April 2006 wereconducted and so far, during construction phase of the project, nine monitoring surveyshave been undertaken i.e. in September 2007, April 2008, April 2009, October 2009,April 2010, September 2010, April 2011, September 2011and the present one, in April2012. Since 2009 biannual monitoring surveys have been conducted at an upstream and adownstream transect of the BHPP with emphasis on the following aspects:water quality determinantsbiology and ecology of fishes and food websfish stock and fish catch including economic aspects of catch andsanitation/vector studies (bilharzias and river blindness)During this survey, baseline assessment of the above mentioned studies was conducted inthe reservoir behind the dam, including studies on algae, zooplankton and benthic macroinvertebrateswhich had been restrained since April 2008. The findings of baseline assessment of the reservoir are also contained in this report and are compared with thoseobtained from Transect 1(Upstream) and Transect 2 (Downstream).
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 41
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  • 36
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20295 | 4230 | 2016-03-05 10:11:12 | 20295 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: The overall objective of the study was to develop a better understanding of how people perceived and responded to the fisheries management measures on Lake Victoria and were affected by them.
    Schlagwort(e): Fisheries ; Sociology ; Lake Victoria Fisheries Organization ; LVFO ; Implementation of a Fisheries Management Plan (IFMP)
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 55
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20296 | 4230 | 2016-03-05 10:14:21 | 20296 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: The purpose of the survey was to gain a better understanding of the role of factory agents in buying fish and setting prices, and of their place and role in fisheries co-management on Lake Victoria, Uganda.
    Schlagwort(e): Fisheries ; Lake Victoria Fisheries Organization ; LVFO ; Implementation of a Fisheries Management Plan (IFMP)
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 44
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  • 38
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20300 | 4230 | 2016-03-05 18:09:06 | 20300 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: Under the implementation of the fisheries management plan (IFMP) for LakeVictoria result area 4, bottom trawl monitoring surveys are undertaken tomonitor changes in the status of the fish stocks and environment of LakeVictoria. Trawl together with the lake-wide Hydroacoustic surveys give areflection on the status of fish stocks in the lake to guide managementdecisions The National working group for bottom trawl surveys in Ugandaundertakes these surveys within the Uganda sector of Lake Victoria. For thepurpose of this survey, the Uganda sector of Lake Victoria is divided intothree zones. A cruise lasting twenty days is conducted in two phases (twolegs) 13 days covering Zones I and II and 7 days in Zone III.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 74
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  • 39
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20154 | 4230 | 2016-02-25 13:19:24 | 20154 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Lake Victoria, besides being the second largest in theworld after Lake Superior, is the largest tropical lake. Itswaters are shared by Kenya (6% of the surface area),Uganda (43%), and Tanzania (51%). Before dramaticstructural and functional changes manifested in the lake'secosystem especially in the 1980s, fish life flourished inthe lake's entire water column at all times of the year.Currently, the situation is much more different from what it was in the past. The exponential increase in the introduced Nile perch (Lates niloticus) and Nile tilapia (Oreochromis niloticus) stocks, siltation, wetland degradation and eutrophication have characterised the lake ecosystem. The two exotic species and the small native cyprinid (Rastrineobola argentea) form the basis of the commercial fishery that was once dominated by two native tilapiines (Oreochromis esculentus and Oreochromis variabilis) and five other large-bodied endemic fishes. Severe deoxygenation observed at shallow depths (Ochumba 1990; Hecky et al., 1994) indicates that a large volume of the lake is unable to sustain fish life.The Lake Victoria catchment is one of the most densely populated areas in East Africa, encompassing a population of about 30 million people. Widespread poverty resulting from high inflation rates, lack of opportunities and general unemployment have characterised the lakeside communities over much of the last two decades.The biophysical environment in which Lake Victoria exists makes the lake particularly susceptible to changes that occur as a result of human modification to the watershed or the lake itself, thus rendering benefits from the lake unsustainable.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 15-28
    Format: 321
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  • 40
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20157 | 4230 | 2016-02-25 13:21:53 | 20157 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: As a fishery, the immensely large (c. 68,800 km2 ) LakeVictoria is a unique ecosystem which together with ariverine connection to the Lake Kyoga basin share acommon endemic "Victorian" fish fauna (Greenwood1966). Until the 1950s, the single socio economicallymost important species of fish in these two lakes wasthe native Oreochromis esculentus Graham (Graham1929) even though the lake also contained a secondnative tilapiine, 0reochromis variabilis , and over 300 other fish species (Beauchamp, 1956).
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 79-92
    Format: 321
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  • 41
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20161 | 4230 | 2016-02-25 13:04:02 | 20161 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Lake Victoria is the second largest lake in the world(69000km2) by surface area, but it is the shallowest (69mmaximum depth) of the African Great Lakes. It is situatedacross the equator at an altitude of 1240m and lies in ashallow basin between two uplifted ridges of the easternand western rift valleys (Beadle 1974). Despite theirtropical locations, African lakes exhibit considerableseasonality related to the alteration of warm, wet andcool, dry seasons and the accompanying changes inlucustrine stratification and mixing (Tailing, 1965; 1966;Melack 1979; Hecky& Fee 1981; Hecky& Kling,1981;1987; Bootsma 1993; Mugidde 1992; 1993).Phytoplankton productivity, biomass and species composition change seasonally inresponse to variations in light environment and nutrient availability which accompanychanges in mixed layer depth and erosion or stabilization of the metalimnion /hypolimnion (Spigel & Coulter 1996; Hecky et al., 1991; Tailing 1987). Over longer,millennial time scales, the phytoplankton communities of the African Great Lakes haveresponded to variability in the EastAfrican climate (Johnson 1996; Haberyan& Hecky,1986) which also alters the same ecological factors (Kilham et al., 1986). Recently, overthe last few decades, changes in external and or internal factors in Lake Victoria and itsbasin have had a profound inlluence on the planktic community of this lake (Hecky,1993; Lipiatou et al., 1996). The lake has experienced 2-10x increases in chlorophylland 2x increase in primary productivity since Tailing's observations in the early 1960s(Mugidde 1992, 1993). In addition to observed changes in the lake nutrient chemistry(Hecky & Mungoma, 1990; Hecky & Bugenyi 1992; Hecky 1993; Bootsma & Hecky 1993), the deep waters previouslyoxygenated to the sediment surface through most ofthe year are now regularly anoxic(Hecky et al., 1994).
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 145-152
    Format: 321
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  • 42
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20163 | 4230 | 2016-02-25 13:36:26 | 20163 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Concerns have been raised over the sustainability ofthe fisheries resource base of Lake Victoria for sometime. The draft National Fisheries Policy states: "Thekey issues in the fisheries sector are resourcedepletion through overfishing aggravated by use ofdestructive fishing gear and methods" (MAAIF 2000).A fishery is said to be degraded if any or all of the indicators begin to show including decline in catches from the fishery, higher proportion of immature fish in the catch and reduction in the species composition of the catch. Inadequate implementation of fisheries management is considered the main cause of resource degradation. One of the factors identified as constraints to fisheriesmanagement has been lack of involvement of the resource users.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 245-256
    Format: 321
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  • 43
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20174 | 4230 | 2016-02-25 15:29:55 | 20174 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: The study was undertaken to generate socio-economic information on fish market systems and performance of the industrial processing industry, which will guidethe processes leading to modernization of the fisheries sector and, sustainability of Lake Victoria fisheries.The main objective of this study was to evaluate the socio-economic implications of the fish marketing systems with particular emphasis on fish export market in Uganda. The study thus, analysed the socio-economic characteristics of fishers and examinined fish marketing systems and the impacts on the fishing activities, food security, employment opportunities and incomes of fisher-folk communities.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 257-271
    Format: 321
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  • 44
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20172 | 4230 | 2016-02-25 15:48:23 | 20172 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Invertebrates constitute a major link in energy flowculminating into fish production in aquatic ecosystems. Intropical water bodies relatively little research has been done on invertebrate ecology especially their role in fishery production.European scientists through periodic expeditions to Africa in the last quarter of the 20th century carried out the earliest research on zooplankton. Rzoska (1957) listedthese early workers including Stuhlmann (1888), Weltner (1897) and Mrazek (1897-1898).Daday (1907), Verestchagin (1915) and Delachaux (1917) undertook further work during the early twentieth century. These earlyworks provide a useful basis for tracking community changes by comparison with modem investigations. Worthington (1931) provided the first quantitative account of the zooplankton of Lake Victoria along with information on diurnal vertical migrations, compared to a temperate lake. The establishment of the East African Freshwater Fisheries Research Organisation (EAFFRO) at Jinja in 1947 enabled investigations on the fisheries, algae, invertebrates and water quality aspects of the lake (EAFFRO Annual Reports 1947-1977) to be regularly carried out. Macdonald (1956) made the first detailed observations on the biology of chaoborids and chironomids (IakefJies) in relation to the feeding of the elephant snout fish, Mormyrus kannume. A detailed study of the biology of the mayfly, Povilla adusta Navas with special reference to the diurnal rhythms of activity was carried out by Hartland-Rowe (1957).The search to unravel the ecological role of aquatic invertebrates in the production dynamics of the lake has taken invertebrate research to greater heights through recent investigations including Okedi (1990), Mavut
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 153-171
    Format: 321
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  • 45
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20234 | 4230 | 2016-04-04 07:21:15 | 20234 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Aquatic macro-invertebrates encompass all those organisms that be seen with unaided eyes. Most macro-invertebrates are categorised as semi-aquatic in that they are aquatic in early stages, but live as terrestrial organisms as adults, while others like gastropods, bivalves, Oligochaetae, Hirudinae and ostracods are exclusively aquatic. Some of them such as mayflies lay eggs in water and subsequent stages also live in water until adulthood when they emerge to live a terrestrial life. In others, eggs are laid near the water, while some like members of Tendipedidae (midges) lay their eggs on the leaves of aquatic macrophytes and after hatching their larvae creep into water
    Beschreibung: On Title page: (The Ugandan Version)
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 66-85
    Format: 90
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  • 46
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20242 | 4230 | 2020-08-30 23:52:40 | 20242 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Genetic biodiversity is the variation among individuals within and between units of interbreeding individuals (populations) of a species. It includes inheritable and transmittable differences that occur between individuals and/or populations of a given species through reproductive interaction. There exists enormous variability among individuals and/or populations of a species for most living organisms, and most of this variation is inheritable. differences among individuals arise through mutation and via recombination of genes during meiosis. These differences are then transmitted to successive generations through sexual reproduction and maintained in the populations through processes such as natural selection and genetic drift. Unfortunately much of this variation is normally threatened and often in danger of extinction because most focus in conservation of natural resources is put at saving species or habitats than varieties or strains of a species.
    Beschreibung: On Title page: The Ugandan version
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 128-131
    Format: 90
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  • 47
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20241 | 4230 | 2016-03-01 14:11:56 | 20241 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Cichlids are known for their explosive radiation especially in the African Great Lakes marked with a high level of lake endemism. These fishes have been characterized mainly along trophic and habitat differences, by variation in morphological structures such as teeth and jaws and by differences in body shape and coloration. Cichlids are important as a microcosm of macroevolution. The explosive radiation, young evolutionary scale, and the isolation of groups characterized with high levels of endemism and presence of living fossils makes the group important for evolutionary and genetic studies. Lake Victoria region cichlids which are isolated and relatively more recent in evolution were the last to be appreciated in their diversity. Recently Ole Seehausen has found scores of rock fishes in Lake Victoria which were up to then thought to be absent from the Lake and only known to occur in Lakes Malawi and Tanganyika.Greenwood put together the species groups of Lake Victoria, and later in the early 1980's revised the classification of haplochromine species to reflect the phyletic origin and interrelationship of the various groups in Lake Victoria region. Melan Stiassny has been interested in early evolution of cichlids while the likes of Paul Fuerst and Lees Kaufman and Axel Meyer have been interested and are working to explain the speciation mechanisms responsible for the explosive radiation and evolution of cichlids. LocallyS.B Wandera and his student Getrude Narnulemo are spearheading the biodiversity and taxonomic studies of cichlids in Lake Victoria region
    Beschreibung: On Title page: (The Ugandan Version)
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 130-134
    Format: 175
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  • 48
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20246 | 4230 | 2016-02-26 17:03:44 | 20246 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-08
    Beschreibung: Biodiversity values provide objective data and advice from which policy makes could assess the conservation options and determine optimal policies that would balance the needs of conservation with the socia-economic needs of the people in the area.
    Beschreibung: On Title page: The Ugandan version
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 164-168
    Format: 90
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  • 49
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20257 | 4230 | 2020-09-15 07:39:11 | 20257 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: Most fish in Uganda comes from lakes Victoria, Albert, Kyoga, Edward, George, about 160 minor lakes and rivers. Fish production of most lakes in Uganda has changed considerably since development of most of the fisheries started during the first half of the 20th century. Analysis of the changes that have taken place in these fisheries provides useful information on the potential and management issues associated with fisheries in Uganda. Total national fish catch statistics are not available for the period prior to 1960. The trends in total fish production from the different water bodies between 1961 and 1995 are illustrated in Figure 3. Total fish catches were 60,000 to 71,000 metric tonnes between 1961 and 1965 and increased after 1965 reaching a peak of 245,000 metric tonnes in 1990. The increase from 1965 to the late 1970s followed establishment of introduced Nile perch and Tilapiines to Lake Kyoga which reached a peak in 1978 and then declined. The second peak followed establishment of the same introduced species in Lake Victoria. This too peaked in 1990 after which catches declined. During I970s, most of the fish came from Lake Kyoga while during the 1980s it was from Lake Victoria. Although the above trend shows an increase in total fish catches, historical trends in fisheries have been of decreasing catches especially of more desirable species. This impression can only be appreciated through examination of historical changes in individual fish production systems. The trend in total catches from major water bodies is illustrated in Figure 4. A brief analysis of the fish stocks and fish production from the different water and the efforts to manage the fisheries of the major lakes is given.
    Beschreibung: On title page: (The Ugandan Version)
    Schlagwort(e): Biology ; Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 1-13
    Format: 13
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  • 50
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20269 | 4230 | 2020-09-04 01:44:46 | 20269 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: Before the introduction and establishment of the Nile perch, Lates nilolicus (L). Lakes Victoria and Kyoga had a diverse fish fauna, dominated by haplochromine cichlids. The haplochromines had evolved into many trophic groups which occupied virtually all trophic levels and contributed to the ecological efficiency of the lakes. Establishment of Nile perch in the main lakes was followed by a decline and in some cases complete disappearance of many haplochromine trophic groups. This is thought to have affected the efficiency of the ecosystem. This study examined the species composition and trophic diversity among haplochromines in Kyoga Minor lakes where Nile perch was not introduced and compared this with historical data from Lake Victoria. Six Kyoga Minor lakes and the main Lake Kyoga (Iyingo) were sampled. Forty one haplochromine species were recorded in the Kyoga lake basin and only fourteen species were recorded from the main Lake Kyoga. Species and trophic diversity of haplochromines were highest in the Kyoga Minor lakes as compared to Lake Kyoga.
    Beschreibung: On title page: (The Ugandan Version)
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 110-128
    Format: 171
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  • 51
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20458 | 4230 | 2016-04-15 11:25:42 | 20458 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: This report presents findings of the CAS conducted in the Ugandan waters of Lake Victoria in March 2010. The results of the previous ten CASs conducted under the same programme in July, August, September and November 2005; in March, August and December 2006; in March, and August 2007; in February and December 2008 are included to show the emerging trends. The report also presents total annual catch estimates for the Ugandan part of the lake from 2005 to 2010.
    Beschreibung: Implementation of a Fisheries Management Plan (IFMP) Project for Lake Victoria
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 43
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  • 52
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20294 | 4230 | 2016-03-05 09:10:39 | 20294 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: In September 2007, the National Fisheries Resources Research Institutecarried out a socio-economic survey on Governance in Co-Management in the fisheries of Lake Victoria. The purpose of the study was to determine the nature and performance of governance of the fisheries resources through co-management structures and systems.
    Schlagwort(e): Fisheries ; Lake Victoria Fisheries Organization ; LVFO ; Implementation of a Fisheries Management Plan (IFMP)
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 89
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  • 53
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20297 | 4230 | 2016-03-05 10:17:13 | 20297 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: The purpose of the Socio-economic Baseline Survey of the Fishing Communities was to provide information on the fish landing beaches, people involved in fisheries, their livelihood activities and facilities available to them.
    Beschreibung: Implementation of a Fisheries Management Plan (IFMP) Project
    Schlagwort(e): Fisheries ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 118
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  • 54
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20298 | 4230 | 2016-03-05 10:19:24 | 20298 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: The purpose of the study was to provide an in-depth understanding of information generation, flow and utilization within Uganda’s regional fish trade. The study was carried out at district headquarters, border points, landing sites and border markets, involving DFOs, Customs Officials, BMU executives and market managers.
    Beschreibung: Implementation of a Fisheries Management Plan (IFMP) Project
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 31
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  • 55
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20302 | 4230 | 2016-03-06 09:41:03 | 20302 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: This monitoring survey No. 11 undertaken between 4th and 9th September 2012 is the second one to be conducted after completion of construction of Bujagali HydropowerDam. Two pre-construction baseline surveys in April 2000 and April 2006 were conducted and during construction phase, eight monitoring surveys (September 2007,April 2008, April 2009, October 2009, April 2010, September 2010, April 2011, September 2011) were conducted.
    Beschreibung: Carried out on behalf of Bujagali Energy Limited (BEL)
    Schlagwort(e): Environment ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 40
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  • 56
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20317 | 4230 | 2016-03-10 07:54:32 | 20317 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-09
    Beschreibung: Lake Albert contributes about 10% to the national fish production. It supports a multi-species fishery based on endemic species. To local fishermen, Lake Albert is a lifeline providing food and income.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 6
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  • 57
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20448 | 4230 | 2016-04-11 08:10:21 | 20448 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: A comprehensive Frame survey was carried out on lakes Kwania, Bisina, Nakuwa, Kyoga and other minor lakes in the Lake Kyoga Basin in June 2008 (Figure 1). The Frame survey was coordinated by the Department of Fisheries Resources (DFR) in collaboration with the National Fisheries Resources Research Institute (NaFIRRI) in terms of technical support. The riparian districts through the sub-county fisheries offices and the BMUs provided the enumerators and supervisors. The frame survey captured all the important characteristics of the fisheries and facilities supporting the fisheries and thus provides a strong baseline for future reference of management interventions in the basin.
    Beschreibung: On title page: THEME 3: Enhancing Integrated Management of Natural Resources. Project: Determination of Appropriate Technologies and Methods for Harvesting and Conservation of Fish Species And Stocks in Lake Albert/Albert Nile and Kyoga Basin Lakes. ARTP II (Extension)
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 20
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  • 58
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20447 | 4230 | 2016-04-09 16:56:16 | 20447 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: Lake Wamala, a small lake (180 km2) located in Central Uganda and believed to have been part of the main Lake Victoria and only got separated about 4000 years ago, has already undergone different levels of fisheries evolution that warrant using it as a case study to inform changes in other systems. Using resources provided by the Lake Victoria Environmental Management Project (LVEMP) II, under the Applied Research Facility, we evaluated the fishing inputs, socio-economic infrastructure and analyzed trends in fishery benefits to guide evolution of management advice.A frame survey was conducted on the entire lake (13th - 23rd March 2012) enumerating all fishing factors and enlisting available and accessible socio-economic infrastructure along the shores of the lake. The lake traverses districts (Gomba, Mityana, and Mubende) with its largest portion lying in Mityana. There are 26 established fish landing sites and about 600 fishers with a similar number of boats on the lake. The total number of boats on the lake is almost equal to the number of fishers; illustrating the common type (paracute) and size (Small, about 4 m) of boats and hence a fishing crew structure of one fisher per boat. Main fishing gears are Gillnets targeting the tilapia (Ngege) and long line hooks (Protperus, Mamba, and Clarias, Male). Almost equal number of boats used the two main gears on the lake (about 300 each). 97% of the gill nets on the lake are small (3.5” (8.9 cm – 4.5” – 11.4 cm) stretched mesh size while 98% of the hoots are large (〈 size 10). The implication is gill net fishers target small tilapia while long line fishers aim at the large mamba and male. Generally the lake has poor socio-economic infrastructure compared to other lakes of Uganda probably due to its geo-morphological setting. The lakes fishing factors have continued to expand with the ever increasing population. There may be need to check the continued entry into the fisheries especially if the increasing effort does not translate into increase in fishery yield.
    Schlagwort(e): Fisheries
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20451 | 4230 | 2016-04-11 08:16:42 | 20451 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: The fisheries resources of Lakes Albert and Kyoga present a high potential for economic growth, food, employment and foreign earnings. However, livelihoods appear to be compromised with the emergence and rapid spread of HIV/AIDS in the fisher communities of L. Albert and Kyoga. HIV/AIDS is considered a silent epidemic that is unique, posing a great challenge to the fisheries managers, health service providers, development planners and the resource users themselves. Fishers have high HIV prevalence, as well as AIDS-related illnesses and mortality rates. The high HIV prevalence rates among the fishing communities in Uganda is between 10-40% compared to the national rates which lie between 6% and 7%. This indicates that the national programmes have not adequately addressed the plight of the fishing communities of Lakes Albert, and Kyoga and the consequences have been devastating. Men and women living in fishing villages across the world have been found to be between five and ten times more vulnerable to the disease than other communities (Tarzan et al 2005, FAO, 2007). The present prevalence rates among the fishing communities stands at 10 to 40 % (LVFO, 2008). Meanwhile the same fishing communities are the essential labour for the Lakes’ fishery industry which is thriving nationally and internationally. That resource potentially can alleviate poverty and the HIV/AIDS threat. Fishing communities are the hidden victims of the disease, mixing patterns with the general population could act as a reservoir of infection that could spill over into the general population to drive the epidemic. On L. Albert, a quarter of the fisher folk were HIV-positive by 1992 compared to 4% in a nearby Agricultural village. Since then, there have been no targeted studies to address or monitor the prevalence rates eight years later, yet the multiplicity factor is high.HIV/AIDS can be linked to unsustainable fisheries, as the labour force available would not go to deep waters to fish, instead would fish in the shallow waters as a coping mechanism. A further effect is the loss to National and local economies and reduced nutritional security for the wider population. HIV/AIDS remains a significant challenge that has created a mosaic of complexity in the fishery sector. This needs to be addressed. It is, therefore, paramount that a comprehensive study was under taken to address this pandemic and the phenomenon of HIV/AIDS based on the study objectives.1. To determine the trend in HIV/AIDS infection among fishing communities and the factors affecting it2. To assess the impacts of HIV/AIDS on fish production and the implications for fisheries management.
    Schlagwort(e): Fisheries ; Health
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  • 60
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20445 | 4230 | 2016-04-09 16:52:36 | 20445 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: Lake Wamala is one of the small lakes in Uganda, and lies between latitudes 0o 15; and 0o 25' N 31o 45' to longitude 32o 00' E, longitude and at an altitude of 1000m above sea level. Following ths 1961 heavy rains the lake expanded from about 100 to 118 sq. km and the swamps covered almost 60 sq km (Okaranon 1993). This lake was first stocked with Oreohromis niloticus eduardianus populary known as Oreohromis niloticus then Oreochromis leucostictus and then Tilapia zillii then after that it was officially opened for commercial fishing in 1960. Despite of the commercial fishery there used to be subsistance fishing that was mainly by the use of wires and hooks and targeted the Clarias and Protopterus species. The lake fishery used to be highly profitable after the opening in 1960; though in 1970s the fishers started complaining of the declining state of the fishery. At that time the O. niloticus had gone down to less than 1 kg per net per night by 1975(Okaranon 1993). Due to it led to scientists undertake fisheries surveys in 1975/78 and later 1988/92 then later on there subsquent survey in 2003. Since that time there has been no work done until March 2012 that both catch assessment and frame surveys undertaken to ensure that management issues are addressed concerning this riparian water body. The main objectives of the survey were:-To assess fish production levels in the commercial fisheries of Lake Wamala (Catch Assessment).To assess the fishing effort and facilities available at the fish landings that supports the fisher folks.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
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  • 61
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20453 | 4230 | 2016-04-11 08:22:23 | 20453 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-10
    Beschreibung: Invertebrates are some of the key food items for fish diets. They thus form an important fish food environment upon which the fisheries thrives in terms of production through dietary support. Invertebrates communities of Lakes Albert and Kyoga have been evaluated and considered the implications for diets and production of commercial fishes.
    Schlagwort(e): Ecology ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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  • 62
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20672 | 4230 | 2016-05-21 17:58:57 | 20672 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-11
    Beschreibung: The results reported on were from a monitoring survey No. 9 undertaken between 9th and 12th September 2011 during construction period of the Bujagali Hydropower Project (BHPP). Two pre-construction, baseline surveys in April 2000 and April 2006 were conducted and so far, during construction phase of the project, eight monitoring surveys have been undertaken i.e. in September 2007, April 2008, April 2009, October 2009, April 2010, September 2010, April 2011 and the present one, in September 2011. Since 2009 biannual monitoring surveys have been conducted at an upstream and a downstream transect of the BHPP with emphasis on the following aspects:water quality determinants biology and ecology of fishes and food webs fish stock and fish catch including economic aspects of catch and sanitation/vector studies (bilharzias and river blindness)in addition to the above mentioned studies, a soil pH survey was undertaken on 15th October 2011 in the area behind the reservoir whose filling started a week earlier. The findings of pH status in the catchment of the dam are also contained in this report.
    Schlagwort(e): Environment ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
    Format: 32
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  • 63
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20696 | 4230 | 2016-05-31 09:19:58 | 20696 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-12
    Beschreibung: A comprehensive Frame survey was carried out by the National Fisheries Resources Research Institute (NAFIRRI) in Lake Albert in January 2007. The frame survey captured the main characteristics of the fisheries and facilities supporting the fisheries and provides baseline information for reference of other studies as well as management interventions.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
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  • 64
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20694 | 4230 | 2016-05-31 09:14:26 | 20694 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-12
    Beschreibung: A baseline survey of the fishing communities wasconducted in 2005/06 as one of the main studies underthe Socio-economic Research and Monitoring WorkingGroup on Lake Victoria. The overall objective of thesurvey was to provide a deeper understanding of thebroad socio-economic characteristics and well being ofthe different stakeholder groups immediately dependenton the Lake Victoria fisheries. An understanding of socioeconomic status of the fishery primary stakeholders, who include fishers, artisanal processors and traders, isessential for any subsequent periodic evaluation ofdevelopment. During the survey, a total of 1,235respondents were interviewed, at 34 landing sites in allthe Ugandan districts on Lake Victoria.The purpose of this fact sheet is to provide informationon the fish landing beaches, people involved in fisheries,their livelihood activities and facilities available to them.
    Schlagwort(e): Fisheries ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
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  • 65
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20697 | 4230 | 2016-05-31 09:24:27 | 20697 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-12
    Beschreibung: Nile tilapia (oreochromis niloticus) a fish introduced into Lake Victoria to boost the fishery industry after the Nile perch lates niloticus fed on the native tilapiine oreochromis esculentus and Oreochromis viabillis to almost extinction has been proposed to be cultured in the Lake Victoria. The fact sheet explains the culture of Nile tilapia in cages in Lake Victoria, Uganda.
    Schlagwort(e): Aquaculture ; Fisheries
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    Format: 8
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  • 66
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20718 | 4230 | 2016-06-01 14:52:43 | 20718 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-12
    Beschreibung: The National Fisheries Resources Research Institute (NAFIRRI), the Department of Fisheries Resources (DFR) and the districts in and around Lake Victoria jointly conduct Catch Assessment Surveys (CAS) with a major objective of providing information on the magnitude of fish catches in the lake. Fisheries contribute as high as 12% to Uganda's GDP. Catch assessment surveys are some of the avenues used to collect information for monitoring fish population dynamics as well as the magnitude, distribution and trends of fishing effort and fish catches. They are necessary for making sound decisions for the management of Lake Victoria fisheries. This information provides the Catch Per Unit ofEffort (CPUE). The CPUE is used together with frame survey data to estimate total fish catches.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
    Format: 8
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  • 67
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20814 | 4230 | 2016-06-18 08:57:26 | 20814 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-12
    Beschreibung: This report presents findings of the CAS conducted in the Ugandan waters of Lake Victoria in December 2015. The results of the previous thirteen harmonized CASs conducted since July 2005 (July, August, September and November 2005; in March, August and December 2006; in March and August 2007; in February and December 2008; March 2010; May 2011 and May 2014) are included to show the emerging trends. The report also presents annual catch estimates for the Ugandan part of the lake from 2005 to 2015. This information together with other fish stock assessment and socio-economic monitoring survey data can now be utilized in the planning and management of the fisheries resources of Lake Victoria. The 2014 CAS results were very vital in the development of the Lake Victoria Fisheries Management Plan 2014.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20821 | 4230 | 2016-06-18 09:58:45 | 20821 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-12
    Beschreibung: Over the period 2008 to 2010, NaFIRRI carried out a number of socio-economic studies on the Kyoga lakes to provide an update of the socio-economic conditions of the fisheries and also to address specific areas of fisheries socio-economic issues and development concerns. The data collection was conducted using Key informant interviews, questionnaire sample surveys, Focus Group Discussions, secondary data searches and field observations. The objective of this fact sheet is, therefore, to provide key information from these studies for use at national, district, community levels as well as by other interested stakeholders.
    Schlagwort(e): Fisheries ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
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  • 69
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20816 | 4230 | 2016-06-18 09:00:50 | 20816 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-12
    Beschreibung: This CAS report provides estimates of the quantities of fish landed in the riparian districts sharing the Ugandan waters of Lake Victoria; the monetary value of the fish catches; the contribution of different fish species to the catches; and the trends in fish catch rates, and the monthly catches for the sampled month since the beginning of harmonized CAS activities in July 2005 to December 2015. The report also compares the annual catch and gross beach value of catch landings in 2005, 2006, 2007, 2010, 2014 and 2015. A total of 15 CASs have been undertaken in the Uganda sector of the lake with data gaps in 2009, 2012 and 2013 due to financial constraints. The annual catch estimates for the years 2010, 2011, 2014 and 2015 were based on one sampling covering the rainy season and may not capture changes that could occur in dry season. There is need to include dry season sampling in future surveys.
    Schlagwort(e): Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20933 | 4230 | 2016-07-24 07:50:29 | 20933 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-13
    Beschreibung: Kariba weed (Salvinia molesta) is an invasive alien waterweedthat was first recorded in Uganda in sheltered bays of LakeKyoga in June 2013. This waterweed has become a commonfeature on Lake Kyoga and its associated rivers, streams andswamps, and has spread to other lakes notably Kwania and Albert in addition to Lake Kimira in Bugiri district.
    Schlagwort(e): Environment ; Fisheries
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
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  • 71
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20932 | 4230 | 2016-07-24 07:47:59 | 20932 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-13
    Beschreibung: Fisheries activities are the main source of livelihood for the communities that live at Lake Edward fish landing sites. The landing sites include: Kazinga, Katwe, Kayanja, Kishenyi Rwenshama and Katunguru and are located within Queen Elizabeth Conservation Area (QECA).In spite of being the main source of livelihood, 74% of therespondents in a 2013 survey reported that catches forthe main targeted fish species namely: Bagrus docmak(Semutundu), Oreochromis niloticus (Tilapia) and Protopterusaethiopicus (Mamba) were declining due to overfishingand catching of immature fish by the rapidly increasingpopulation. Lake Edward Frame surveys had shown that thenumber of fishing crafts increased from 302 in 2008 to 330 in 2011, while the number of fishers increased from 355 to 600 during the same period. Between 2008 and 2010, catch perboat, for Bagrus docmak (Semutundu) declined from 5.25kg to 4.04 kg and for Protopterus aethiopicus (Mamba) from2.63 kg to 1.03kg.It has been suggested that reducing pressure on the lakeshould be handled using different approaches, one of whichis introduction of programs for enhancing livelihood optionswhich do not conflict with conservation of Queen ElizabethConservation Area (QECA). The main goal of this study wastherefore to identify, prioritize and pilot livelihood options at selected landing sites of Lakes Edward and George.
    Schlagwort(e): Agriculture ; Fisheries
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    Format: application/pdf
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  • 72
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    National Fisheries Resources Research Institute (NaFIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20931 | 4230 | 2016-07-24 07:51:39 | 20931 | National Fisheries Resources Research Institute, Uganda
    Publikationsdatum: 2021-07-13
    Beschreibung: The National Fisheries Resources Research Institute (NaFIRRI), the Directorate of Fisheries Resources (DiFR), the Local Government fisheries staff and those from the Beach Management Units (BMUs) of the riparian districts to Lake Victoria regularly and jointly conduct Frame and Catch Assessment Surveys. The information obtained is used to guide fisheries management and development. We reveal the trends in the commercial fish catch landings and fishing effort on the Uganda side of Lake Victoria, over a 15 year period (2000-2015) and provide the underlying factors to the observed changes. The contribution of the high value large size species (Nile perch and Tilapia) to the commercial catch of Lake Victoria has significantly reduced while that of the low value small size species, Mukene has increased over a ten year (2005-2015)period. The information is intended to update and sensitize the key stakeholders on the status of the Lake Victoria fisheries. In addition, the information provided is expected to guide policy formulation and management planning by the fisheries managers at all levels including the BMUs and Landing Site Management Committees (LSMCs), the Local government fisheries staff and the Directorate of Fisheries Resources. The information is anticipated to create awareness among the lakeside fisher communities to reverse the current trend in fish declines.
    Beschreibung: Issue 1, Vol. I (Series name not specified)
    Schlagwort(e): Fisheries
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  • 73
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25105 | 18721 | 2018-08-23 05:49:02 | 25105 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: During the years 1382-83, some biological aspects of three species Tiger-toothed Croaker, Otolithes ruber, Javelin grunter, Pomadasys kaakan, Black Pomfret, Parastromateus niger, have been investigated in the Oman Sea along Sistan-O-Baluchistan province. Based on the frequency of developed maturity stages (IV, V), a prologed spawning activity extending from August to March was determined for O.ruber, and the Gonadosomatic Index (GSI) suggests two peaks:the minor one in October and the major one in March-April. Comparison of Hepatosomatic Index (HI) and Condition factor (Kn) with the peak spawning indicated a reverse relationship. According to length at first maturity (Lm50%= 40cm) and exploitation of fish at length 42cm above, the stretched optimum mesh size of nets was calculated to be 100mm. On analysis of stomach food item, fish group dominated (80%), which of them Anchovy accounted for 40% of the total frequency. Comparison of mean length between the years 1374-75 and 1382-83 showed 4cm in decrees. Population dynamics parameters were determined through length based modals and the exploitation rate was estimated to be E=0.6, suggesting high level exploitation. The usal streched mesh size of nets(constructed from multifilament webbing) for capturing O.ruber were less than the proposed optimum mesh size of nets, indicating 78% of the total landings were smaller than Lm50%. Total landings in 1381 have increased up to 15% when compared to those of the year 1376. Despite the decrease of total efforts (Panel.day) by 37%, the mean value CPUE has increased up to 82%. Regarding Pomadasys kaakan species, a year-round spawning activity has been observed, with two peaks: A major one in April and an aminor one in September. As those of O.ruber species, there was an inverse relationship between HI and Kn with the peak spawning activity. Based on the length at first maturity (Lm50% = 44cm) and capturing fish of the length at 46cm and above, the stretched optimum mesh size of nets was calculated to be 149.6mm. According to analysis of stomach contents, fish group accounted for 35% of the groups studied, which of them , Largehead hairtail, Trichiurus lepturus linnaeus, constituted 52% of the total frequency. In addition to estimation of population dynamics, the exploitation rate was estimated to be E= 0.49. Majority of the species catch was made by mesh size of nets used for O.ruber of which 133mm mesh size accounted for the level (30%). Information on length distribution showed that 60% of the total fish landed was below Lm50%. Total landings in 1381 decreased to 10% in comparison to 1376.Total fishing efforts and CPUE also decreased to 33% and 24% respectively. For parastromateus Niger, There was a long period spawning activity from March to December, with two peaks: A major one in August and a minor one in March. According to Lm50% (39cm) and catching of fish 39cm above, the stretched optimum mesh size of nets was calculated as 167.7mm. Based on stomach contents, ring-shaped worms and larval shrimp equally made 29% of the total frequency showing the highest contribution. Comparison of mean length indicated 3cm in decrease in 1382-83 when compared to 1374-75. Population dynamics parameters were estimated and the exploitation rate was estimated to be E = 0.54. The usual stretched mesh size of nets for P. niger was 146mm and 81% of the total fish landed were smaller than Lm50%.In 1381,total catch of the species increased four and a half-fold in comparison to 1376, while total efforts decreased up to 28% and CPUE increased two and a half-fold.
    Schlagwort(e): Biology ; Fisheries ; Iran ; Oman Sea ; Investigation ; Biological ; Tiger toothed Croaker ; Otolithes ruber ; Javelin grunter ; Pomadasys kaakan ; Black pomfret ; Parastromateus niger ; Season ; Fishing
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25108 | 18721 | 2018-08-24 06:17:44 | 25108 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: A survey on parasitic infections on Barboid fishes of South- west of Iran (Khouzestan province) were done during Spring 2002 to Autumn 2004. Altogether 296 specimens from 5 different fish species were examined. The fishes were collected from five stations of Karoun River (Ahwaz-Goulestan, Molasani, Dez Dam), Karkheh River (Hamidia Dam) and Shadgan Lagoon. The fishes transported alive to the laboratory where they measured and weighted. Then they were killed by cutting the spinal cord. According to the results of this study 22 different parasites were revealed, 15 of then detected to the species level and 7 of them to the genus level. The metazoans are as follows: The monogenea, are Dactylogyrus onchoratus, D.persicus. Two digeneans: Diplostomum spathaceum, Asymphilodora sp. Five nematods: Rhabdochona denudata, Philometra karuensis, Philometra sp., Psudocapilaria tomentosa Contracecum larvae sp. and only one acanthocephalus, Neoechinorhynchus. Three protozoans are: Ichtyophthirius multifiliis, Trichodina sp., Goussia sp., Balantidium sp. And Myxozoans: Myxobolus persicus M. karuni M. nodulointestinalis, M iranicus, M.mesopotamia, M. pfief eri, Myxobolus sp., Myxidium rhodei, Myxidium pfiefferi. Histopathological investigation of some parasites was done as well. Pathologacal potential of M. nodulointestinalis and M. pfiefferi were revealed. According the results of this study three new parasites and eleven new hosts for Iranian freshwater fishes and three new host for three Myzoxoans were introduced.
    Schlagwort(e): Biology ; Ecology ; Fisheries ; Iran ; Khouzestan Province ; Barbus fishes ; Parasites ; Protozoa ; Metazoa ; Dactylogyrus onchoratus ; Rhabdochona denudata ; Philometra karuensis ; Species ; Fish
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  • 75
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25116 | 18721 | 2018-08-24 06:19:54 | 25116 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: The aim of this research was to identify fish species distributed in the water resources located at West- Azarbaijan province. Sampling was done seasonally, from 14 sampling sites in main branches of different rivers including Aras, Zangmar, and Ghator. Fish samples caught with different tools, fixed in 10 % formalin, and finally transferred to the laboratory for biological investigations. The identified fish were 25 species belonging to 8 fish family comprising of Cyprinidae, Balitoridae, Cobitidae, Siluridae, percidae, poecilliidae, Gobiidae, Salmonidae. Among them, cyprinidae family had the highest percentage of diversity. There were 2 species from Balitoridae and 1 species from the rest of other family.
    Schlagwort(e): Biology ; Fisheries ; Iran ; Western Azarbaijan province ; Identification ; Native fishes ; Water
    Repository-Name: AquaDocs
    Materialart: monograph
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  • 76
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25322 | 18721 | 2018-09-12 09:50:04 | 25322 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Hamoun fish, Schizothorax zarudnyi, is an indigenous species of the eastern waters of Iran, which is exclusively found in this region. However recently drought occurrence in the Chahnimeh reservoirs (a semi natural water body) making them vulnerable to extinction. As an appropriate action to address this problem and according to the 3 side contract between Italian Government – UNDP - Islamic republic of Iran Government and the Italian government financial support to reduce poverty in the Province of Sistan-Baluchestan through the reinforcement and dissemination of aquaculture activities the project was developed at the Hamoun Research Unit by the Chahbahar Fisheries Research Center to record the breeding normative of 1 g weight larvae for restocking and other researching purposes. 331 broodstocks of the indigenous species Shizothorax zarudnyi weighing 800-2450 g were collected from the Chahnimeh reservoirs in early autumn, 2006. From 5/3/2007 (the project is supported and communicated on 2010) , Ovulation was stimulated with three stimulators; pituitary extract (3-6 mg kg-1 body weight), GnRH-A (20-30 mg kg-1 body weight) and anti dopamine (10-15 mg kg-1 body weight) that was given in 2-3 doses to breeders. Of 169 injected breeders , some were injected On mid March of 2007 (12-13 ºC water temperature) responded to the injection 25% ,while the rest were injected On April of 2008 (14-16 ºC water temperature) responded to the injection 65%. In the present project of 167 breeders 82 were female and 87 male. Totally 30 female breeders released their eggs in different stages. 20 female breeders released their eggs completely, 3 breeders released half of their eggs and 7 released 1/3 of their eggs. The male breeders just injected in the final dose of hormontrapy and all were ready for releasing sperms however the ovulation in female breeders occurs between 353-428 h ºC and after the final dose of injection. Ripe eggs were stripped from the females and fertilization was done by the dry method. Fertilized eggs were transferred to veis incubators and troughs. Incubation period for eggs differs and larvae hatch out after about 910 days at an average water temperature of 12.5 °C. Maintained at 13-14 °C, complete absorption of yolk sac in Shizothorax zarudnyi larvae occurred after 5-8 days. Larvae were fed with a mixture of powdered milk and egg yolk in this stage followed by decapsulated Artemia cysts and nauplii of Artemia and then on formulated starter diets used for carps. Because the ponds were not ready, larvae were maintained in troughs for about ten days before they were transferred to two 1200 m2 earthen ponds where they reached a body weight of about 1 g. They were then handed over to the Iranian Fisheries department in the region. Larvae were fed with the starter feed SFCO in the earthen ponds. About 350 thousand larvae were stocked in two earthen ponds. Based on the results of present study and other studies we may conclude that artificial breeding in Schizothorax can be successfully achieved at 14-16 ºC in flow through systems using hormone therapy (combination of GnRha and anti dopamine) and larvae could be easily cultured in earthen ponds. However this species exhibits lower growth rates as compared to carps its high expenses could have an important role in economical feasible.
    Schlagwort(e): Aquaculture ; Iran ; Sistan and Baluchestan province ; Chahnimeh reservoirs ; Chahbahar ; Hamoun fish ; Schizothorax zarudnyi ; Breeding ; Species ; Aquaculture ; Temperature ; Female ; Eggs ; Hormontrapy ; Sperm ; Ovulation ; Larvae ; Fisheries ; Earthen ponds
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  • 77
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25346 | 18721 | 2018-09-14 07:15:47 | 25346 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: This study was carried out in August – september 2009 in Bushehr province waters. Two different shrimp bottom trawls were used in which were woven by Poly Amid and Poly Ethylene with mesh sizes (stretched) of 50 mm and sack with 35 mm. Also 2 different vessels of two dhows and one steel ship each with 26 and 30 hauls were used and taken in to comparison from point of obtained results. Total catch of PA and PE trawels were 4592 and 5535 kg of which the ratio of shrimp catch and by catch for PA trawl was 32.4 and 67.6 % respectively; and for PE trawl was 34.2 and 65.8%. Total catch of PA and PE trawls of steel trawler ( ship ) were estimated 3158.0 and 4784.7 kg, respectively, of which the shrimp/ bycatch ratio was 6.6 : 93.4%. There was a higher amount of bycatch for PE comparing to PA trawl (p〈0.05). on the other hand the decrease of shrimp and bycatch for PA comparing to PE dhow trawlers were 21.3 and 15.0% and for ship were 34.6 and 34.0% respectively. The weight ratio is 1:15 i.e . in PE ship trawl, in proportion to on kg shrimp, 15 kg bycatch was harvested. it is proposed to standardize the mesh size and also to do obligtory the instal of squared mesh size panel .
    Schlagwort(e): Fisheries ; Iran ; Bushehr Province ; Shrimp ; Poly Amid ; Poly Ethylene ; Weight ratio ; Mesh size ; Obligtory ; Trawling
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  • 78
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25351 | 18721 | 2018-09-13 12:58:15 | 25351 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: 30000 juvenile Indian majour carps (Labeo Rohita,Cirhinus merigala, Catla catla) imported (2007 and 2008) and transferred to the earthen ponds in Astaneh Fisheries Research Station (Gilan) and Sheiban Resaerch center (Khozestan), In order to assess the viability of rearing fry up to 1 gram fingerlings under the climatic condition of north and south part of Iran . Growth parameters from the larval stage to 1 g were studied also. The fry with 300 mg weight, were released in to 3ponds.specimens were separated to tree experimental categories. fishes were fed with artificial food and also with the natural products of the ponds which were enriched with organic fertilizers, after being equally stocked in the ponds .During the experiment, oxygen level ,PH, turbidity, and temperature were measured . Monthly fry samples were taken, for weight and length biometrical analysis and also determination of the weight gain percentage, average daily growth rate, specific growth rate. Results have indicated adaptations and considerable growth in this species, with an increase from the initial weight of 300 mg to an average of 13.5±1.6 mg in 50 days period until the end of November for fingerlings.Catla was gain 1 g. during 15 day while Roho and Merigal were gain 1 g. during 14 and 10 days respectively. Results revealed that the Indian majour carps compatibility with the condition in Gilan province was succesfull and the combination of species and optimization of their compatibility specialy in other provinces like Sistan and Baluchestan were remind for futhre studies.
    Schlagwort(e): Aquaculture ; Iran ; Guilan Province ; Astaneh ; Indian carp ; Growth ; Labeo Rohita ; Cirhinus merigala ; Catla catla ; Juvenile ; Earthen ponds ; Fisheries ; Fry ; Fingerlings ; Artificial food ; Oxygen level ; Turbidity ; Fertilizers
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    Format: application/pdf
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  • 79
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25360 | 18721 | 2018-09-14 07:17:12 | 25360 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Awareness of health and nutrition of fish has led the food industry to development of fishery-based ready-to-eat products. In this study seven filling materials based on 60-70 - 80% fish mince from 7 local fish species ‘i.e.’ Talang Queen fish (Scomberoides commersonnianus), oriental sole (Brachirus orientalis), Barred sickle fish (Drepane longimana), Big eye Croaker (Pennahia anea), Japanese threadfin bream (Nemipterus japonicas), javelin grunter (pomadasys kaakan) and Indian mackerel (Rastrelliger kanagurta) were formulated and applied for developing fish strudels. A 9-point hedonic scale ranging from 1 (extremely dislike) to 9 (extremely like) was used for screening the acceptance of the prototypes. A 3-component D-optimal Mixture Design was also applied to optimize the fish strudel formulation. Preliminary experiments were done to identify the high-impact ingredients, which had a high effect on the sensory quality when their levels (%) were changed. The results indicated that fish strudel containing 60% Talang Queen fish (Scomberoides commersonnianus) mince in the filling materials had significantly higher liking in odor, flavor, and overall acceptability than the other prototypes. So it was selected for quality changes study. Product's characteristics and stability were studied during 6-month storage at -18 °C. The fish strudel packed in a polyethylene sealed bag was stable during the storage period. The peroxide and TVBN values remained low. The results in this paper provide important information for companies planning to develop convenience food from low value fish. Furthermore, development of strudel filled with fish mince/ flesh could be an effective way to enhance nutritional and functional value of such products. The products could be used as a nutritious snack especially for kids which could be a means of increasing fish consumption.
    Schlagwort(e): Fisheries ; Iran ; Low value fish ; Fish strudel ; Fish mince ; Acceptance test ; Quality changes ; Scomberoides commersonnianus ; Talang Queen fish ; Pennahia anea ; Rastrelliger kanagurta ; Nemipterus japonicas
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  • 80
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25352 | 18721 | 2018-09-14 06:57:48 | 25352 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: 15000 juvenile Indian majour carps (Labeo Rohita,Cirhinus merigala, Catla catla) imported (200 ) and transferred to the earthen ponds in Astaneh Fisheries Research Station , In order to assess the viability of rearing under the climatic condition of north part of Iran and also achieve some growth parameters from the larval stage to market size.The fry with 300 mg weight, were released in to 12 ponds. Specimens were separated to tree experimental categories: 1= (30%indian carp and 70% chinees carp) , 2= (50%indian carp and 50% chinees carp) , 3= (70%indian carp and 30% chinees carp) .single chinees carp production were used as control . fishes were fed with artificial food and also with the natural products of the ponds which were enriched with organic fertilizers, after being equally stocked in the ponds .During the experiment, oxygen level ,PH, turbidity, and temperature were measured. Monthly fry samples were taken, for weight and length biometrical analysis and also determination of the weight gain percentage, average daily growth rate, specific growth rate. Results have indicated adaptations and considerable growth in this species, with an increase from the initial weight of 300 mg to an average of 13.5±1.6 mg in 50 days period until the end of November for fingerlings. Also the average weight of growing phase (second year of production ) was 647g for Labeo Rohita ,420 g. for Cirhinus merigala and 734g for Catla catla. The special growth rate (SGR)in Roho was 4.51 %.and 3.9 % for merigal and6.2 % for Catla while for Chinees carps SGR was 4.9, 6.7, 7.6 and 5.8 for silver carp,grass carp, common carp and big head respectively. Results revealed that the Indian majour carps compatibility with the condition in Gilan province was succesfull and the combination of species and optimization of their compatibility were remind for futhre studies.
    Schlagwort(e): Aquaculture ; Iran ; Guilan Province ; Astaneh ; Indian carp ; Growth ; Labeo Rohita ; Cirhinus merigala ; Catla catla ; Polyculture ; Juvenile ; Earthen ponds ; Fisheries ; Rearing ; Larval stage ; Fry ; Specimens ; Artificial food ; Fertilizers ; pH ; Turbidity ; Temperature
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  • 81
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25361 | 18721 | 2018-09-14 07:10:40 | 25361 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Fish soup powder is produced from three kinds of fish in Chabahar catched in Oman sea white flesh of many low value fish like threadfin bream, perches etc. can be used to prepare instant fish soup powder. This product has a high consumer acceptability in many countries in this research project we used 4 low value fishes with local name of Sarm, Chaman, Aroos and Talal belonging to families Carangidea, Lethrinidea, Drepanidae and Scombroidea. soup powder packed in laminated pouches and the shelf life of it is one year in ambient temperatures. The quality used to be good up to 6 month but after this time the quality decreases gradually. The experiment on fish soup showed that the percentage of protein was 32 percent, fat 11 percent and humidity 12 percent and ash 4 percent. The experiment conducted on fish soup powder was peroxide, total microbial count, organoleptic test for 6 month.
    Schlagwort(e): Fisheries ; Iran ; Oman sea ; Sistanblochestan province ; Chabahar ; Fish Soup Powder ; Species ; Fish ; Threadfin bream ; Carangidea ; Lethrinidea ; Drepanidae ; Scombroidea ; Temperature ; Protein ; Microbial count
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
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  • 82
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25383 | 18721 | 2018-09-14 07:42:31 | 25383 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Regarding to monitor of demersal resources in the Persian Gulf and Oman Sea, and also biomass and CPUA estimation of them, eleven research cruises were carried out by using R/V Ferdows-1 equipped with bottom trawl, covering the area from 49º 00´ E in the west (borderline with Kuwait) to 61º 25´E in the east (borderline with Pakistan) from 2009 to 2011. The study area was stratified into 17 strata (A to Q) of which 10 strata (A to J) were in the Persian Gulf and 7 strata (K to Q) were in the Oman Sea, covering the depths of 10-50 m in the Persian Gulf and 10-100 m in the Oman Sea. A total of 316 stations were randomly selected and the biomass and CPUA were estimated by swept area method. In 2009, due to the bloom of jellyfish, there was some problem for sampling and therefore made some bias in our estimation. Therefore, the biomass of jellyfish was excluded from all calculations. The comparison between two regions indicated that the percentage of density of demersal fishes in the Persian Gulf during years 2009, 2010 and 2011 were 1.5, 3.7 and 1.7 times more than the Oman Sea and totally 60-80% of total biomass was found for the Persian Gulf. Also a comparison among 17 strata the highest biomass was found for K region (Sirik to Jask) in the Oman Sea in 2009 & 2011; and C & D regions (Genaveh to Dayyer) in 2010 in the Persian Gulf. The same comparison was done for CPUA of commercial, non-commercial and total in both water bodies and it was found that in years 2009 and 2011 the regions of L (Jask to Meidani) and K (Sirik to Jask) in the Oman ; and 2010 the G region (Mogham to Farour) in the Persian Gulf had the highest value of this parameter. It can be concluded that the north-west of the Oman Sea has the best condition of biomass and CPUA of commercial and non-commercial demersal fishes; and on the contrary the low values were estimated for A region (north-west of the Persian Gulf) and P region (Konarak to Ramin) in the Oman Sea. With review the mean CPUA in defferent depth layers for years 2009, 2010 and 2011, it was concluded that with increasing the depth, the mean CPUA is decreased and the lowest CPUA belongs to depths of 50-100 m. The comparison between commercial and non-commercial groups in both ecosystems, it concluded that the density of commercial species were higher than non-commercial ones; and for years 2009, 2010 and 2011 the commercial species consist of 52.2, 57.1 and 59.7 % of total biomass. In all years the Persian Gulf indicated higher values than the Oman Sea. The most abundant fishes were Rays, Catfishes, Grunts, Japanese threadfin bream, Carangids, Hair tail, Barracuda and Lizardfish for both Persian Gulf and Oman Sea.
    Schlagwort(e): Fisheries ; Iran ; Persian Gulf ; Oman Sea ; Sirik ; Jask ; Bandar Genaveh ; Commercial fishes ; Non-commercial fishes ; Biomass ; Catch per unit of area ; CPUA ; Sampling ; Density ; Species ; Catfishes ; Grunts ; Japanese threadfin bream ; Carangids ; Hair tail ; Barracuda ; Lizardfish
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    Materialart: monograph
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  • 83
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25143 | 18721 | 2018-08-26 16:50:02 | 25143 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: This study was carried out on rivers, basins & qanat of Qom region during the 1376-1378and Fish samples were taken from 2 permanent rivers (Qomrood ,Ghara_chag)& from some seasonal ones (Tagharood, Zavarian, Vesva, Biraghan). Also local fishes was followed in 100 qanats in the region and Random fish sampling was done in permanent river extension out of province. This study aimed to recognize different fish species in the province water reservoir and estimating the fisheries potential in the province. For fish sampling nets such as mashk, salik, hook and hand tailored were used. Electroshoker was not used at all. Results of fish recognition showed that fish samples belong to 12 species & 4 family of "cyprinidae", "Balitoridae", "cyprinodontidae" and "poecilidae".The qanat fishes of the montain (kahak, Khagestan) and pastora area (Ghanavat,jafarabad) included by two families of "cyprinid", "Balitoridea".In some qanat which were connected to rivers more species of fish and anotherAquatic animal were observed & sampled.At the and map of geographical distribution of local fishes was planned.
    Schlagwort(e): Biology ; Iran ; Qom province ; Qomrood ; Ghara_chag ; Tagharood ; Fish ; Samples ; Species ; Fisheries ; Electroshoker ; Cyprinidae ; Balitoridae ; Cyprinodontidae ; Poecilidae ; Aquatic ; Recognation
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  • 84
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25137 | 18721 | 2018-08-26 16:54:02 | 25137 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: In order to come up with the responsible fishing pattern, there was a need to identify some of the biological characteristics and population dynamic parameters of yellowfin tuna, skipjack and longtail tuna in the Persian Gulf and Oman Sea. Occurrence of empty stomach was high in all the specimens obtained from the gill net fisheries. Purple back flying squid was the most dominant prey species observed in the yellowfin tuna study (61% in males and 57% in females). The length of maturity (Lm50%) for yellowfin tuna was estimated 76 cm, 62.5 cm skipjack and 62.5 cm longtail tuna. Length range of skipjack was from 31-100 cm and bony fishes were the most dominant prey species observed in the skipjack. The monthly gonad somatic index was driven higher values after June which could be indicated as spawning period. The catch per unit of effort of three purse seiners (Azadegan 1, 2, 3) was compared in 1998- 2000. The species composition was 47% yellowfin tuna, 51% long tail tuna and 2% skipjack.
    Schlagwort(e): Biology ; Iran ; Persian Gulf ; Oman Sea ; Pelagics ; Biological characteristics ; Population ; Yellowfin tuna ; Skipjack ; Longtail tuna ; Specimens ; Gill Net ; Fisheries ; Purple back flying squid ; Species ; Maturity ; Length ; Gonad Somatic Index ; Spawning ; Estimation ; Potential
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  • 85
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25168 | 18721 | 2018-08-26 17:35:37 | 25168 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: In this study, influence of modified atmosphere packaging on shelf life of trout (Oncorhynchus mykiss) (whole fish without visceral and without head and tail fish) stored in 4 to 6ºc was examined. Fish stored in MAP condition and control samples, in different time, were tested for spoilage chemical factors (TVN, PV and pH), microbial parameters (total viable count, clostridium botulinum) and sensory factors too. Mixed gases including co2 (30-50%), N2 (40-65%) and o2 (0 to 20%) were used for trout (without head and tail =6 treatments) and (whole fish without visceral and control = 2 treatments) statistical the analysis results showed that examined factors were significant difference during storage (P〈0.001). Mixed gases haven t had inhibitory effect on spoilage factors (chemical and microbial parameters). However spoilage process was delayed. Increasing of chemical and microbial changes in control samples was higher than treatment samples especially TVN. The results also showed that shelf life of control samples stored 4-6ºc were between 6-12 days but in MAP samples were 19 days. Mixed gases including CO2 (40%), N2 (55%) and O2 (5%) were the best formula and the shelf life of fish (without head and tail) was 16 days where it was 19 days in whole fish (Lack of visceral). The results showed that storage of trout in MAP condition facilities storage and increasing of fish shelf life too.
    Schlagwort(e): Fisheries ; Iran ; Oncorhynchus mykiss ; Modified Atmosphere Packaging ; Shelflife ; Rainbow trout ; Samples ; pH ; Microbial parameters ; CO2 ; N2 ; O2
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    Materialart: monograph
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  • 86
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25169 | 18721 | 2018-08-26 17:43:57 | 25169 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Bony fish stocks are being legally utilized by 134 fishing cooperatives in the Iranian side of the Caspian Sea mainly through beach seine. This fishing method has been invariantly used over the past. Fifty years with actually no alteration or technical modifications in the fishing nets despite the substantial changes in the quality & quantity of bony fish resources. Based on the data obtained from the stock assessment project for bony fish, the amount of premature or young fish (substandard size) caught during the past decade has been far greater than those of authorized fish size and even the figures for certain species suggest heavy over fishing to such an extent that in the case of frisii kutum, there has been a reduction by 50% in the overall kutum landings. Thus in order to modify the technical design of the fishing with a view to alleviate the catch of non-standard fish and whereby prevent over fishing by beach seine, it seems imperative therefore to launch a biometric study on bony fish stocks particularly the two intended fish species namely Rutilus frisii kutum and mullet which would involve identification of their standard weight and length using pertinent mathematical equations as well as determining proper mesh size of the code-end and other parts of the nets & consequently the H. R, d/a coefficients. The operations related to project were carried out in the "Inland Aquaculture Research Institute" net mating plant and beach seine site in Anzali during 2005-7 which aimed at designing and constructing standardized beach seines and comparing the fishing performance & yields with those of ordinary beach seine nets under equal conditions with a ratio of 3:1. The results concerning the quality and quantity of fish caught during a whole fishing cycle were recorded in the related data forms. The statistical analysis consisting the comparison of the quality of fishing performance in both the experimental and control beach seine nets was made using T. student and excel, spss 12 software packages. The results indicated that the reduction in the amount of non-standard fish caught in standardized beach seine net (the experimental net) was meaningfully different from that of the ordinary (control) net showing the superior fishing performance of the former. The catch level of non-standard R.frisii kutum decreased from 67.1% in the control beach seine net down to 7.1% in the standardized beach seine net and these figures for mullet were 29.98% and 1.1% respectively. Based on the results obtained and considering the apparent superiority of the experimental net in catching greater number of mature fish and less number of premature or non-standard sized fish, the use of this modified beach seine net can be proposed to Iranian fisheries organization as a viable alternative to the traditional beach seine nets.
    Schlagwort(e): Fisheries ; Iran ; Caspian Sea ; Anzali ; Beach seine net ; Rutilus frisii kutum ; Mullet ; Standard sized fish ; Non-standard sized fish ; Bony fish ; Fishing ; Stock assessment ; R.frisii kutum
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  • 87
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25485 | 18721 | 2018-10-05 07:01:40 | 25485 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Study and research on the fishing gears in northern waters of Persian Gulf (Khuzestan Province Coastal Waters) was carried out from March 2009 to February 2010. Sampling was done for trawl in summer and autumn, for purse seine in autumn and for gillnet and trap in all seasons. The average of total catch was in trawl 167.9 1.06 kg. The rate of bycatch in ± 207.89 and trap 1.66 ±270.17, gillnet 275.86 ± 48.4, purse seine 1795.6 ± trawl net was 87 percent, purse seine net 30.49 percent, gill net 70 percent and trap 6.19 percent. In this study, the number of bycatch species in trawl net are 38 species, gill net 36 species, trap 10 species and purse seine net 4 species. The result of two way ANOVA test in trawl net between bycatch and time, and between bycatch and place showed non-significant differences (p〉0.05, f=0.3) (p〉0.05, f=0.9). The result of two way ANOVA test in gillnet between bycatch and time, showed significant (p〈0.05, f=14.7), and between bycatch and place showed non-significant (p〉0.05, f=1.8). The result of two way ANOVA test in trap between bycatch and time and between bycatch and place was non-significant (p〉0.05, f=0.5). According to the result, rate of bycatch of trawl net is higher than other gear, so control and manage of bycatch in trawl is most important.
    Schlagwort(e): Fisheries ; Iran ; Persian Gulf ; Khuzestan Province ; Bycatch ; Fishing gear ; Net ; Trawl ; Gillnet ; Purse seine ; Trap ; CPUE ; Coastal waters
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    Format: application/pdf
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  • 88
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25506 | 18721 | 2018-10-05 07:29:35 | 25506 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Seafood business is one of the important subjects in fishery activation. It is covered a wide range of fishery activation from the fishing to the table. The fishery production success is depending to the many factors. Without considering the market conditions and suitable trading the fishery activations are not commercial. Therefore considering to the different subjects is necessary. This project is one of the road map seafood processing plans. The aim of this project was to study of the world fishery production, world fish processing, marketing and fish production and treading in Iran by using current different information.
    Schlagwort(e): Fisheries ; Iran ; Fishery ; Road map ; Seafood
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 49
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  • 89
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25178 | 18721 | 2018-09-03 14:20:19 | 25178 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Pin bone removing is a new equipment for pin-bone removal increase customer satisfaction and revenue even further the bones were pulled out at good speed. Pin boning especially is very often done manually which causes lots of global transports to low cost countries for processing new technique will help make processing operations more efficient and profitable The new generation pin bone removing equipment is mainly for trout and is not suitable for carp fishes the new pin bone remover which works with air of compressor and hand. has proved to work in almost twenty different fish species, including Great silver smelt, Pike Perch, Coho, Sockeye salmon, Atlantic Salmon, Sea Trout, Saithe, Haddock, Herring, Whitefish, Chinook, Salmon, Perch, Rainbow Trout, Char, Mackerel and Hake. Therefore it will be suitable for carp fishes too. After a day’s work all vital parts can be removed by hand without any tools, for effective cleaning to the fish and gives nice looking filets and is determined to help processors by offering state of the art bone-removing equipment which will increase speed, yield and efficiency. But pin bone removing done manually does not give a nice looking fillet also has a considerable waste of fish.
    Schlagwort(e): Fisheries ; Iran ; Silver Carp ; Fillet ; Bone ; Generation ; Species ; Pike Perch ; Coho ; Sockeye salmon ; Atlantic salmon ; Whitefish ; Rainbow Trout ; Evaluation ; Great silver smelt
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    Materialart: monograph
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  • 90
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25188 | 18721 | 2018-09-03 17:21:36 | 25188 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Fish sausages were made from minced fish meat and additives using dehydrogenated vegetable oil and fish oil. Four experimental groups were studied; Group 1 with 65% minced fish meat and 12% soybean oil, Group 2 with 65% minced fish meat and 12% olive oil, Group 3 with 65% minced fish meat and a mixture of 6% fish oil and 6% soybean oil, and Group 4 with 65% minced fish meat and 11.3% corn oil and 0.7% cod liver oil. In all the experimental groups the fish was first headed, the entrails removed and then washed and cut into small pieces. The fish pieces were then put in the meat extractor where the skin and bones were separated from the meat. The minced fish meat was rinsed with clean water and the water was let to drain. The additives for each experimental group were then blended with the minced meat and the mixture was filled in the sausage casings. The stuffed sausage casings were then placed in containers and put in a room to cook. After cooking the sausages were packed and stored in the refrigerator. The quality of the product was tested (chemical, microbial and organoleptic) from phase zero through the entire experimental period which lasted 30 days. Based on the results obtained it was evident that sausages in the experimental Group 1 showed better taste and flavor as compared to those in the other groups.
    Schlagwort(e): Fisheries ; Iran ; Minced fish meat ; Sausage ; Vegetable oil ; Fish oil ; Additives ; Microbial ; Organoleptic ; Emulsion ; Colour ; Texture
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  • 91
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25189 | 18721 | 2018-09-03 17:16:20 | 25189 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Mariculture is one of the most important sub sector fisheries industry in Asia-pacific region. There are over 40 marine fish species commonly cultured, such as groupers (Epinephlus spp.), snappers (Lutjanus spp.) and Asian sea bass (Lattes calcarifer). But this industry in Southeast Asia experienced serious disease problem since the late 1980s. Khouzestan province has a coastal line about 200 km with many Creek and suitable area for Mariculture. Marine fish culture in Khouzestan province in floating net cages was successfully initiated in Ghazaleh Creek following development of Epinephlus coioides artificial seed production in the 1372. This study has been conducted since 1384 to 1387 in Bandar-e-Imam station. The aim of this research project was to determine the health management status in cage and hatchery, identification of marine fish pathogens (Bacteria, Fungi and parasite), examination of heavy metal in cages sediment and test the physico chemical factors of water in cages and hatchery. Different parts of broodstocks body and fingerlings including intestine, gills and body surface were examined. In this study, 18 Genus and species of bacteria such as Vibrio alginolyticus, Vibrio anguillarum, Vibrio splendidus, Vibrio vulnificus, Plesiomonas shigelloides, Aeromonas hydrophila, Aeromonas caviae, Pseudomonas sp. were diagnosed. Also 7 Genus and species of fungi such as: Aspergillus Niger, Aspergillus flavus, Aspergillus fumigatus, Penicillium sp. And Fusarium sp. Were isolated. In this survey following of disease appearance parasites such as; protozoans Amyloodinium sp. And Trichodina sp. In E.coioides and Acanthopagrus latus and Sparidentex hasta, monogean such as Benedenia sp. In E.coioides and S. hasta, isopoda probably Nerocila sp. In nasal cavity of E.coioides and copepods such as: Caligus sp. And Lernanthropus sp. In A.latus and S.hasta were identified. In this study, microorganisms (bacteria, fungi and parasites) isolated from three different marine fishes species, were reported for the first time in Iran. The range of the physico-chemical parameters of water in cages were: DO (5.42-10.24 ppm), BOD5 (1.51-10.24 ppm), No_2 (0.0197-0.89 ppm), No_3 (3.53-11.93 ppm), Po_4 (0.965-6.05 ppm), turbidity (4-58 NTU) and ammonia (0.0008-0.03 ppm). According to the results parameters such as nitrate, nitrite and turbidity were found more than standard levels. Heavy metals: Ni and Pb relatively high observed.
    Schlagwort(e): Biology ; Iran ; Khouzestan province ; Bandar-e-imam ; Mariculture ; Fisheries ; Species ; Epinephlus spp. ; Lutjanus spp. ; Lattes calcarifer ; Bacteria ; Fungi ; Parasite ; Aspergillus niger ; Aspergillus flavus ; Aspergillus fumigatus ; Penicillium sp. ; Fusarium sp. ; Vibrio alginolyticus ; Vibrio anguillarum ; Vibrio splendidus ; Vibrio vulnificus ; Plesiomonas shigelloides ; Aeromonas hydrophila ; Aeromonas caviae ; Pseudomonas sp. ; Grouper ; Snapper ; Sea bass
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  • 92
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25192 | 18721 | 2018-09-05 16:01:12 | 25192 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Exploitation of bony fishes resources started on 12 October 2005 and finished on 9 April 2006 in 2005-2006. 142 beach seines caught about 14333.4 tons of bony fishes by 47101 hauling. The total catch was estimated 21844.7 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 97 percent of total catch. Length classes 39-40, 31-32 and 40-41 cm predominated for kutum, golden grey mullet and common carp, respectively. Age groups 3 to 5 year comprised 84.2, 74.8 and 83.7 percent for Kutum, golden grey mullet and common carp, respectively and age group 4 year was dominant with 42.0, 35.9 and 43.0 percent, respectively. K value and L_∞ calculated 0.26 (/year) and 58.3 cm for Kutum and 0.15 (/year) and 61.5 cm for golden grey mullet, respectively. The total biomass and MSY estimated about 24733.7 and 8550.4 tones for kutum and about 16948.0 and 4999.0 tones for golden grey mullet, respectively. Exploitation rate (E) calculated 0.71 and 0.70 for Kutum and golden grey mullet, respectively. In 2006-2007, the exploitation of bony fishes resources started on 12 October 2006 and finished on 7 April 2007 in 2006-2007. 134 beach seines caught about 14120.0 tons of bony fishes by 48470 hauling. The total catch was estimated 23801.8 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 98.5 percent of total catch. Length classes 39-40 and 38-39 cm predominated for kutum and common carp, respectively and length classes 27-28 and 29-30 cm predominated for golden grey mullet. Age groups 3 to 5 year comprised 80.2 and 71.8 percent for kutum and golden grey mullet, respectively and age groups 4 to 6 year comprised 71.8 percent for common carp. Age group 3, 4 and 5 year was dominant with 35.5, 32.1 and 27.1 percent for kutum, golden grey mullet and common carp respectively. K value and L∞ calculated 0.27 (/year) and 60.7 cm for Kutum, 0.2 (/year) and 58.4 cm for golden grey mullet and 0.19 (/year) and 66.7 cm for common carp, respectively. The total biomass and MSY estimated about 46654.9 and 14801.4 tones for Kutum, about 19549.0 and 5748.4 tones for golden grey mullet and about 10584.3 and 2186.0 tones for common carp, respectively. Exploitation rate (E) calculated 0.69, 0.53 and 0.52 for kutum, golden grey mullet and common carp, respectively.
    Schlagwort(e): Fisheries ; Iran ; Caspian Sea ; Bony fishes ; Kuttum ; Golden grey mullet ; Growth and mortality parameters ; Biomass ; MSY ; Common carp ; Coastal waters
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  • 93
    Publikationsdatum: 2021-07-16
    Beschreibung: Investigation on small pelagic fishes in the north of the Persian Gulf (Qeshm Island and Bandar Lengeh) coastal waters during October 2006 to September 2008, illustrated that 6 sardine and 2 anchovy species were locally existed. Sind sardinella (Sardinella sindensis) and Buccaneer anchovy (Encrasicholina punctifer) were dominated in this area. The peak of sexual maturity for Sind sardinella and Buccaneer anchovy occurred in spring and summer respectively. Reproduction period for Sind sardinella was from the middle of winter to late spring, and Buccaneer anchovy encompassed reproduction capacity all the year. The female: male ratio was calculated 1:0.7 and 1:0.9 for Sind sardinella, 1:1.27 and 1:1 for Buccaneer anchovy in Qeshm Island and Bandar lengeh sequentially. The mean of absolute fecundity were estimated 16234 and 16168 for Sind sardinella, 1277 and 1141 for Buccaneer anchovy in Qeshm Island and Bandar Lengeh respectively. L_M50 and L_C50 were calculated and the results showed both species mainly caught before length of maturity, and the mass populations have not sufficient opportunity to reproduction. Both species were planktonivore, theirs food prefect mainly consisted of copepods, naplius and bivalves. Vacuity index indicated both spices were semi-voracious appetite fishes. Based on calculated length-weight relationships in S. sindensis and E. punctifer, they have isometric growth. Growth parameters were estimated, the results illustrated that they were growth fast and short live species, which suggested S. sardinella and E. punctifer have 3 and 2 years maximum life span respectively. The recruitment pattern indicated double recruitment peaks per year in both species. Annually, four cohorts were distinguished in Sind sardinella and 3 cohorts in Buccaneer anchovy. Total mortality (Z), natural mortality (M) and fishing mortality (F) were estimated in both species, and the values of exploitation ratio (0.78 & 0.74) in Sind sardinella and (0.72 & 0.41) in Buccaneer anchovy were reasonable for current fishing effort due their short life span. Analysis of the results showed that CPUE in sardine and anchovy affected by reproduction and feeding processes. Results showed significant correlation between sardine CPUE and Sardine GaSI (P〈0.05, r= 0.499), similarly between anchovy CPUE and anchovy GSI (P〈0.05, r=-0.635). Further, significant correlation between sea surface temperature with sardine CPUE (P〈0.05, r=0.493), phytoplankton distribution (P〈0.01, r=0.560), anchovy GSI (P〈0.05, r=0.526), anchovy GaSI (P〈0.05, r=-0.500) and chlorophyll a (P〈0.01, r=0.780). Phytoplankton distribution with sardine GSI (P〈0.05, r=0.453), zooplankton distribution with anchovy GSI (P〈0.05, r=0.671), and chlorophyll with sardine GSI (P〈0.01, r=0.761) have significant correlation.
    Schlagwort(e): Fisheries ; Iran ; Persian Gulf ; Qeshm Island ; Bandar Lengeh ; Sardinella sindensis ; Encrasicholina punctifer ; Reproduction ; Feeding ; Growth and mortality ; Catch per unit effort ; Sea surface temperature ; Chlorophyll a ; Sexual maturity ; Plankton ; Naplius ; CPUE ; GSI ; Sardine ; Anchovy ; Coastal waters ; Surface ; Temperature ; Distribution
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  • 94
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25206 | 18721 | 2018-09-04 08:43:13 | 25206 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: From June 2004 to March 2006, a survey in Iran waters (Bushehr province) has completed. Sampling was accomplished in two area, north and south. In this period 15 cruises achieved in summer and 3 cruises in autumn and winter. In each cruise of north and south area 18 and 30 stations were sampled respectively. Stations row on three depth stratums that is, below 10 m, 10-20 m, and 20-30 m in total area from Bahrekan to Motaf. Some Biological parameters such as sex stages, sex ratio, mean total length, species composition were measured. Duration of shrimp fishing season in years 2004, 2005 and 2006 were 40, 44 and 40 days in summer respectively. In June and august the Catch per Unit Effort (CPUE) in south was more than northern area. CPUE increases in north area especially at the end of summer during fishing season gradually. Computing on Biomass estimation resulted 674, 1024 and 873 ton in years 2004, 2005 and 2006 respectively for all shrimp species (usually tiger shrimp, white shrimp and other). Total commercial landing of shrimp catch in above years were 1602, 1597 and 1110 ton respectively. Percentage of tiger shrimp in commercial landing in above years was 77, 75 and 84 respectively. We found that the least mean length of tiger shrimp was observed in southern area especially from Motaf to Rodmond stations. The schools of prawn penaeus semisulcatus enter to Bushehr waters from southern area that is Motaf region. Other than Motaf; Nakhilu, Rase khan and Rod-mond show same characteristics. Also in this region, density of shrimp increases with depth in most summer cruises. The result from analyses of gonad maturation studies shows the adult and mature females (stages III and IV) of P. semisulcatus accumulate in northern area at the end of autumn. This stock catches in autumn by illegal fishing.
    Schlagwort(e): Fisheries ; Iran ; Persian Gulf ; Bushehr province ; Biomass ; Shrimp ; Penaeus semisulcatus ; Fishery ; Green tiger prawn ; Opening season ; Closure season ; Survey ; Sampling ; Sex ratio ; Species ; CPUE ; Illegal fishing ; Parameters
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  • 95
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25217 | 18721 | 2018-09-06 06:02:14 | 25217 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: A variety of products made from fish meat is increasingly being produced in most countries. The availability of low cost ingredients, the use of suitable formulations and modern equipment has made it feasible to produce different products of high nutritious value to satisfy consumer demands. Starch is an ingredient used in most products in the food industry because of its physical characteristics. In the present study fish ball were prepared using starch from two different sources (wheat and potato) either individually or by mixing equal proportions of two sources of starch at a rate of 5, 10 and 15% to 80% ground meat of silver carp. A control group was also tested without adding starch. Results obtained indicate that flavor, odor and texture of the resulting product made with 10% starch were more acceptable as compared to the other trials. Fish ball made with the addition of 15% starch were lighter in color and sticky and loses its strength to form. No significant differences were observed in color, flavor, odor and texture of fish ball in trials containing 10% starch from one individual source (p〉0.05) and the resulting product in these trials were rated higher in organoleptic tests as compared to those containing 5 and 15% starch. Among trials containing two sources of starch, mixed trials with potato and wheat (5% potato + 5% wheat) were rated higher in organoleptic tests as compared to the other trials(p〈0.05).
    Schlagwort(e): Fisheries ; Iran ; Silver Carp ; Fish Ball ; Starch ; Sensory quality ; Nutritious ; Hypophthalmichthys Molitrix
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    Materialart: monograph
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    Format: application/pdf
    Format: 106
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  • 96
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25615 | 18721 | 2018-10-07 16:19:08 | 25615 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Aras dam reservoir situated in the northwest of Iran, west Azarbaijan province, is the only water resource of Astacus leptodactylus harvest in the country that more than 250tons of this species were exported to different countries all over the world, annually. On the other hand, one of the polices of Iranian Science Fisheries Institute is the release of this species into other water resources in the country and for this purpose, the study of risky diseases such as Crayfish pest (Aphanomysis astasi) and other zoonotic diseases are considered as the research priorities of aquaculture development of the country. This study was carried out to health screening of Astacus leptodactylus at Aras dam reservoir from winter 2013 to fall 2014. In this regard, A total of 394 harvested livefreshwater crayfish Astacus leptodactylus (255males, 139females) weretested. 9 epibionts and parasites peritrich protozoans were identified. From Metazoan parasites group, Branchiobdella kozarovi with incidence rate of (100%) in obtained samples was the only isolated organism from this group that identified up to species level. There was a heavy damage in gills of samples with Aeolosoma hemprichi (Annelid) in winter with90% prevalence. Furthermore, Other Epibiont fouling organisms such as Rotatoria; free living nematods and suctoria were observed in this survey. The fungi study of the lesions and melanized spots of mentioned samples revealed their infection to Penicillium expansum; Aspergillus flavus; Alternaria sp. ; Fusarium sp. and Saprolegnia sp. The results of bacterial study confirmed the presence of pathogen bacteria in Astacus leptodactylus. The most frequency percentage (15.16%) in hepatopancrease were related to Aeromonas hydrophila and the least one (1.37%) were due to Yersinia bacteria. Also, only Aeromonas hydrophila and Staphylococcus aureus were isolated and identified from heamolymph, respectively. The results revealed that the combination of Salmonella typhi, Escherichia coli and Staphylococcus sp. has caused the most infection rate while. Yersinia ruckeri and Salmonella typhi has caused the least infections in Astacus leptodactylus. According to the isolation of 6 bacteria species from hepatopancreas and 2 species from heamplymph , it can be concluded that hepatopancreas enjoyed the higher infection rate compared to haemolymph in the obtained samples.
    Schlagwort(e): Ecology ; Iran ; Aras Dam Reservoir ; West Azarbaijan province ; Astacus leptodactylus ; Health screening ; Hygienic ; Freshwater ; Crayfish ; Species ; Fisheries ; Aphanomysis astasi ; Parasites ; Metazoa ; Aeolosoma hemprichi ; Epibiont fouling ; Alternaria sp.
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  • 97
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25617 | 18721 | 2018-10-07 16:24:05 | 25617 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: The project is funded by the CASPECO Project which is the Third Phase of the GEF supported project in the Caspian Sea region titled “The Caspian Sea: Restoring Depleted Fisheries and Consolidation of a Permanent Regional Environmental Governance Framework”, and implemented by the Iranian Fisheries Research Organization (IFRO) in partnership with four Coastal Research Centers affiliated to IFRO, Coldwater Fishes Research Centre (CFRC).The project's objective is to improve the conservation and restoration of Caspian Salmon (Salmo trutta caspius) stocks. In accordance with IUCN criteria Caspian Salmon is placed in the red list of endangered fish. In the recent decades the destruction of habitats for juveniles, reduction of genetic diversity and fish immune system were main causes of the Caspian salmon decline. Numbers of public meetings were held with participation of fishing communities’ representatives, experts, relevant local authorities and experts of the IFRO and Iranian Fisheries Organization (IFO), Iran Environment Protection Organization (IEPO), Water Resource Management (Ministry of Energy) and University senior professors, in order to create interaction and understanding of the project objectives. Educational awareness and extension program were conducted with the involvement of fisheries communities, private sector and NGO associations. The results of the project suggests that cross-sectoral coordination for sustainable fisheries can be achieved through building partnerships and enhancing communication between the environment, private, fisheries sectors and academia. Cross-sectoral cooperation through this project improved public awareness on growing risks facing Caspian Salmon from different sources including local sources (illegal fishing and over-fishing, urban wastewater, environment destruction, industrial pollutants, pollution of air and water resources), new emerging and invasive organisms, climate change, implications of the Caspian salmon population decline on economic and social affairs of the people who depend on them for their livelihood and food security and their role in fish stock protection. The project, through its capacity building, extension and educational programs and efforts to link science to management, could translate scientific findings into an action agenda for managers and policy makers that can bring an improvement in the future of the Caspian Sea salmon stock.
    Schlagwort(e): Management ; Iran ; Caspian Sea ; Conservation ; Salmo trutta caspius ; Caspian salmon ; Fisheries ; IFRO ; Juvenile ; Genetic diversity ; Immune system ; Illegal fishing ; Pollution
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    Materialart: monograph
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  • 98
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25622 | 18721 | 2018-10-08 05:50:41 | 25622 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: The overfishing and changing environmental following the introduction of the comb jelly Mnemiopsis leidyi in the Caspian Sea, the population structure has a strong influence on kilka fishes in the Caspian Sea and therefore to in this investigation which had been done in commercial catch regions (where discharged theirs catch) in three ports Babolsar, Amirabad (in mazandaran) and Anzali (in Guilan), stimated catch and catch per unit effort, the age structur of catch, length- weight relationship, von Bertalanffy growth parameters, condition factor, sex ratios, maturity stags, spawning and feeding. The result shown that catch of kilka in Iranian coastal in 2012 decreased from 24080 ton to 22696 ton in 2013. But CPUE increased was 2.7 ton (Vessel ×Night) and there was no significant changes. Common kilka was the predominant all months of the year, 98.1 and 98.9 percent in 2012 and 2013 respectively. The mean length was 104.4±10.5 and 101.6±11.2 at the same time and range length 92/ 5 – 117/5 mm were the dominant population(about 75%). Relative abundance of fish less than 77.5 mm and more than 127.5 mm is very low. Age abundance during this period have not been substantially changed and always fishes with 3 and 4 year olds had the highest frequency73.6 and 73.5 percent respectively. The parameters of the Von Bertalanffy growth curve were (8.141) 048.1 for common kilka. The instantaneous coefficient of natural mortality (M) was 0.506 yr-1. The instantaneous coefficient of fihing mortality and total mortality were 0.694 yr-1 and 1.2 yr^-1 , respectively. The exploitation rate of common kilka varied during 2012-2013 between 0.41-0.50. The mean condition factor 1.41±0.14 (n=5801) and 1.38±0.16 (n=6754) at the same time respectively. According to statistical analysis Anova oneway were a significant difference between condition factor at the same time . Main prey common kilka was Acartia tonsa accounting for over 80%. It seems Common kilka due to a decrease in the frequency of other zooplankton species depend more than ever on Acartia tonsa and this species is probably a concentration of prey for Common kilka.
    Schlagwort(e): Biology ; Fisheries ; Iran ; Caspian Sea ; Mazandaran Province ; Guilan Province ; Anzali ; Babolsar ; Kilka fishes ; Age ; Growth parameters ; Condition factor ; Exploitation rate ; Feeding ; Reproduction ; Overfishing ; Comb jelly ; Mnemiopsis leidyi ; Population ; Sex ratios ; Maturity ; Spawning ; Mortality ; ANOVA ; Acartia tonsa
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  • 99
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    Unbekannt
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25231 | 18721 | 2018-09-06 05:59:12 | 25231 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: Fish is a valuable nutritional source witch use of it in daily meal has a beneficial role on nutritional needs supply and also causes mental and physical health especially in people who have protein and food deficiencies. Unfortunately, per capita consumption of sea foods in Iran is 5.5Kg which is very lower than world standards (18 kg). So, study on fish ice cream formulation, by use of fish protein concentrate (FPC) instead of milk protein, had done to make variation in sea foods products and also increase per capita consumption of these kinds of foods. FPC has very high protein concentration and a lot of necessary amino acids like lysine and methionine. Also its protein is very digestible with highly biological value and it's PER in compare with casein PER is high. At first fish protein concentrate type A produced from silver carp in three steps by the extraction with isopropyl alcohol solvent and heat. Microbiological and physicochemical specifications of produced FPC by rules of FDA and FAO were accepted. Finally according to panel test results, substitution of 30 percent of milk with FPC in comparison with 50%, 70% FPC substitution prepared (P〈0/05). Also microbiological and physicochemical specifications of product were tested and results in compare with national standards of Iran were accepted.
    Schlagwort(e): Fisheries ; Iran ; Fish ice cream ; Fish Protein Concentrate ; Silver Carp ; Nutritional ; Amino acids
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
    Format: 123
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  • 100
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25239 | 18721 | 2018-09-07 06:54:42 | 25239 | Iranian Fisheries Science Research Institute
    Publikationsdatum: 2021-07-16
    Beschreibung: To study the preparation of frozen minced meat from abramis brama orientalis commonly known as sim from Arras lake and from silver carp cultured in the Azerbaijan province, and later this minced meat converted to fish ball and fish burger, in this process microbial, chemical and organoleptic tests was done on samples for frozen minced meat on Sims fish the TVN was 10.1 in zero phase and 14.1 after three month and peroxide value from 0.9 t0 3.1 at the same duration. But he value was higher when converted to fish ball, TVN ranged from 14 to17.6 and per oxide from 1.1 to 4.7 after three month, the unit for TVN was mg/100gram and peroxide unit meq/1000 gram, the microbial tests was also resulted in an acceptable range, the meat of Sims fish had no significant difference with the silver carp comparatively only the color and the smell of the fish was little different, so we could conclude that we can use Sim fish meat for frozen minced meat product and this can increase the consumption of fish in the region in the future.
    Schlagwort(e): Fisheries ; Iran ; Azerbaijan province ; Aras lake ; Minced fish meat ; Frozen fish ball ; Abramis brama ; Silver Carp ; Culture ; Oreganoleptic test ; Samples
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    Materialart: monograph
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