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  • Fisheries  (525)
  • Inland waters  (47)
  • Analytical Chemistry and Spectroscopy
  • Cell & Developmental Biology
  • Inorganic Chemistry
  • Jinja, Uganda  (465)
  • Environment Agency
  • 101
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17096 | 4230 | 2015-06-12 14:53:21 | 17096 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-10
    Description: About 20% of Uganda territory is surface water from which 250,000m tons of fishis produced. In addition to fish exports which earned the country US$ 40m in1996, fish provides 50% of protein diet of the 20m people translating into a percapita consumption of 12kg. It is estimated that fishery related activities employat least one million people.The goal of FIRRI is to generate and transfer improved technologies and policy recommendations aimed at ensuring sustainable fish production and a healthy environment in which fish is produced.
    Keywords: Fisheries
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  • 102
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17100 | 4230 | 2015-06-10 07:07:49 | 17100 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-10
    Description: One of the avenues through which the Government objective of povertyeradication in Uganda can be achieved is Fisheries development andmanagement. Up to 20% of Uganda’s surface area is covered by aquaticsystems i.e. lakes, rivers, streams and swamps and to a large extent, all theseare interconnected. The large lakes: Victoria, Albert, Kyoga, George and Edwardare sites of the more important commercial fisheries, but even the smaller waterbodies, rivers (e.g. the Rivers Nile and Kagera) and the surrounding swampsprovide sources of livelihood to rural areas.Fish is an important source of high quality food, employment revenue and iscurrently the second most important export commodity next to coffee generatingapproximately US $ 80 million annually. Fish exports to regional markets areworth at least US $ 20 million annually. Fish flesh is rich in proteins, which aresuperior to those of beef and poultry. Fish flesh contains an anticholesterolwhich assists in reducing heart diseases. Some fishes are of medicinal valuee.g. haplochromines (Nkejje) are used to treat measles. Most of the fish inUganda is got from lakes Victoria, Kyoga, Albert and Albert Nile, Edward andGeorge production systems as well as from the 160 minor lakes and rivers andthe associated wetland systems. Capture fisheries based in these systemscontribute up to 99% of the fish production in Uganda but aquaculture is alsopicking up. The fishing industry employs up to one million Ugandans
    Keywords: Fisheries
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  • 103
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17101 | 4230 | 2015-06-10 07:10:31 | 17101 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-10
    Description: About 18% of Uganda’s surface area is covered with water from which300,000 metric tonnes of fish are produced. Fish are currently the secondmost important export commodity generating approximately US$100 million.Fish provides 50% of protein diet for the 20 million people translating into percapita consumption of 12 kg. Close to the production system, this figure risesto 50 – 100 kg. It is estimated that fishery-related activities employ at leastone million people countrywide (i.e. 5% of the population).Fish is an important source of high quality food, employment, and revenueand it is currently the second most important export commodity next to coffeegenerating approximately US $ 80 million annually. Fish exports to regionalmarkets are worth at least US $ 20 million annually. Fish flesh is rich inproteins, which are superior to those of beef and poultry. Fish flesh containsan anticholesterol which assists in reducing heart diseases. Some fishes areof medicinal value e.g. haplochromines (Nkejje) are used to treat measles.Most of the fish in Uganda is got from lakes Victoria, Kyoga, Albert and AlbertNile, Edward and George production systems as well as from the 160 minorlakes and rivers and the associated wetland systems. Capture fisheries basedin these systems contribute up to 99% of the fish production in Uganda butaquaculture is also picking up. The fishing industry employs up to one millionUgandans.
    Keywords: Fisheries
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  • 104
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17025 | 4230 | 2016-02-19 09:19:59 | 17025 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-10
    Description: The fisheries of Lakes Mutanda and Mulehe during 1998/9 were mainly at subsistence scale and only few fishers operated at irregular intervals. The commercial catch records between 1963 to 1999 showed that Lake Mulehe was landing more fish than Lake Mutanda despite the fact that Lake Mutanda (26.4 km2) was bigger than Lake Mulehe (4.11 cm2). The constant decline of catches was due to irregular restocking and applying low stocking densities of fry. However, restocking should consider using species that withstand low temperature (15-240C) in the district. These include Oreochromis niloticus (Nile tilapia), Macropterus salmoides (Black bass), and Cyprinus carpio (Common carp). Most of these species have either disappeared or declined to very low levels. Due to lack of commercial fish species for harvest, the fishers by 1998/9 resorted to harvesting the haplochromines, Clarias carsoni and edible frogs (Xenopus kigesiensis) as alternative resources. Experimental studies have shown the need and techniques to enhance fish production on these two lakes.
    Keywords: Fisheries
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  • 105
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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
    Publication Date: 2021-07-10
    Description: 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)
    Description: Monitoring carried out by NaFIRRI nn behalf of Bujagali Energy Limited (BEL)
    Keywords: Ecology ; Fisheries
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  • 106
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    Fisheries Resources Research Institute (FIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17185 | 4230 | 2016-03-04 10:42:25 | 17185 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-10
    Description: Lake victoria is the second largest lake in the world.the lake is shatred between three East African countries (Kenya,Uganda and Tanzania) the lake basin is estimatedto have about 30 million people who depend on it as a source of fish for food,employment,income and recreation.the lake is transport locally and regionally is used for recreation and is recongnised internationally for its high fish species diversity of ecological and scientific value.This document in the first in a series to be produced on different fish production systems in Uganda and should stimulate discussions and comments to guide application of scientific findings into the policy environment.
    Keywords: Fisheries
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  • 107
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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
    Publication Date: 2021-07-10
    Description: 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)
    Keywords: Ecology ; Fisheries
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  • 108
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    Lake Victoria Fisheries Organization (LVFO) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17191 | 4230 | 2020-10-17 15:27:46 | 17191 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-10
    Description: A lake wide acoustic survey with the objectives of obtaining estimates the biomass and spatial and temporal distribution patterns of the major commercial fish spices was conducted in Lake Victoria from 17th Feb - 17th March 2007 using SIMRAD EY500 Scientific echo-sounder connected to a 90 beam width split beam transducer operating at 120khz. In additional environment assessment was concurrently conducted with the survey using a sea Bird CTD and a Secchi disk to help explaining observed fish biomass level and the spatial and temporal distribution patterns.
    Keywords: Fisheries
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  • 109
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    Lake Victoria Fisheries Organization (LVFO) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17198 | 4230 | 2020-10-17 15:35:47 | 17198 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-11
    Description: This report provides summaries of the major findings from lake-wide acoustic survey conducted on Lake Victoria (18th Feb-17th March 2008). The survey followed another one conducted in August 2007 using a recently acquired SIMRAD EK 60 dual frequency echosounder.The dual frequency echo sounders comprises 70 and 120 KHZ General Purpose Transceivers GPTs connected to 7 split beam transducers operating at the respected frequencies. The two transceivers were separately calibrate using the specific spheres supplied together with the system from SIMRAD. All the calibrations were within specifications of the manufacturer.
    Keywords: Fisheries
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  • 110
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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
    Publication Date: 2021-07-11
    Description: 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.
    Description: Environmental Assessment Consult Limited (EACL)
    Keywords: Environment ; Fisheries
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  • 111
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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
    Publication Date: 2021-07-11
    Description: 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.
    Description: Implementation of a Fisheries Management Plan (IFMP)
    Keywords: Fisheries ; Sociology ; Lake Victoria Fisheries Research Organization ; LVFO
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  • 112
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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
    Publication Date: 2021-07-11
    Description: 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.
    Description: Lake Victoria Environmental Management Project (LVEMP)
    Description: This is LVEMP Socio-Economic Research Report, 6
    Keywords: Fisheries ; Sociology
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  • 113
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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
    Publication Date: 2021-07-10
    Description: 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)
    Description: Prepared for Bujagali Energy Limited (BEL)
    Keywords: Environment ; Fisheries
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  • 114
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    National Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17146 | 4230 | 2020-10-12 18:18:08 | 17146 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-10
    Description: A key aspect in the approval to develop a 250 MW hydropower project on the Upper Victoria in Uganda was to include an environmental monitoring component during construction and after the construction phase. Baseline information on the aquatic ecosystem and fisheries of the Upper Victoria Nile was part of the EIA submitted to NEMA by AES Nile Power during 2000. Subsequently, this information was updated in April 2006. Fisheries are important socio-economically and in terms of the high fish species diversity in aquatic ecosystems in Uganda. Therefore, the National Fisheries Resources Research Institute (NaFIRRI) has been part of these developments providing specific inputs related to the fisheries and aquatic ecosystem of the Upper Victoria Nile to EIA of hydropower schemes in the country. As aquatic organisms of environmental and socio-economic importance, different species of fish and fish populations are effected by various factors mostly exploitation.
    Keywords: Fisheries
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  • 115
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    East African Fisheries Research Organisation | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16877 | 4230 | 2020-08-23 07:25:41 | 16877 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The material described in this paper was collected during a survey of the fish and fisheries of the Malagarazi River and swamps carried out in August and September, 1952, by members of the East African Fisheries Research Organisation and the Inland Fisheries Officer (Kigoma). Previous records of Cichlid fishes from the Malagarazi River have been published by David (1937) and Poll (1946 and 1948). These included Haplochromis burtoni (Ganither)'and H. malagaraziensis David from the upper reaches of the river, and Tilapia karomo Poll from the delta. The present collection was made at Uvinza and Iragala on the open river and at Katare on one of the numerous swamps. Besides the one new species described below, Horei burtoni and H. horei were collected at Irangala, and a species of Serranochromis at Uvinza and Katare. Two apparently new species of Haplochromis were collected in all three areas and will be described at a later date.
    Keywords: Fisheries
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  • 116
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    East African Fisheries Research Organisation | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16887 | 4230 | 2020-08-23 07:41:40 | 16887 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The parasitic Copepod Lernaea bistricornis Harding was described by Harding (1950) from a single specimen found in Lake Tanganyika on the endemic Cichlid fish Cardio pharynx schoutedeni POLL. No further specimens were known until when several individuals were collected in the same lake by Dr. G. MARLIER from the endemic Cichlid fishes Cyathopharynx Furcifer (Boulenger) and Callochromis pleurospilus (Boulenger). These records indicate that L. bistricornis has fairly wide host preferences, at least within the fainily Cichlidae, and suggest that, like its relative L. lophaira Harding which parasitizes the Cichlid fishes of L. Nyasa, it is capable of parasitizing any member of this group within its range of distribution.
    Keywords: Fisheries
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    Type: article
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    Format: 214-216
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  • 117
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16893 | 4230 | 2016-02-19 10:50:34 | 16893 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: Implications of the fish export trade on the people and the fisheries resource of LakeVictoria, Uganda were examined. Eight fish processing factories and ninety fishers wereanalyzed in terms of socio-economic characteristics of fishers and the economic characteristics of fish factories. Results indicated that industrial fish processors in Uganda are presently the main link between the artisanal fisher-folk and the overseas export markets. Their entry into the market has stabilized and expanded the fisher-folk market and average earnings. Fishers attributed improvement in incomes and living standards (76%) to positive changes in the fish market (78%) in the last 5 years (1994-1999). Ugandan fisher-folk communities are not seriously affected by the Nile perch exports (73%) because they normally have easy access to cheap fish at prices much less than urban prices and; depend mainly on alternative fish species of less export value. The price of Nile perch influences positively the price of Tilapia
    Description: Lake Victoria Environmental Management Project (LVEMP)
    Description: Paper presented at Colline Hotel, Mukono- LVEMP and NARO National Scientific Conferences, 2001 and at Glow III Conference, Arusha, Tanzania, 2002
    Keywords: Fisheries
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  • 118
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16898 | 4230 | 2015-06-04 18:00:02 | 16898 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: The construction of several barrages in order to develop the hydroelectric and irrigation potential of the Tana river has been proposed and the probable effects of these developments upon the fish and fisheries of the area' has been investigated. Briefly in the highest reaches the sport fishery will be unaffected, in the middle reaches the sparse subsistence fisheries will be only slightlyinconvenienced but in the terminal reaches of the river the subsistence and commercial fishing enterprises are expected to be seriously reduced by the progressive re-regulation of river-flow. However each new dam will support a new and productive reservoir fishery and with proper development the annual yield of fish from the Tana basin is expected to increase considerably.
    Description: Top of title page: EAFFRO Occasional Paper, 10
    Keywords: Fisheries ; EAFFRO
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  • 119
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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
    Publication Date: 2021-07-11
    Description: 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.
    Description: 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)
    Keywords: Fisheries
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  • 120
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    Lake Victoria Fisheries Organization (LVFO) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17201 | 4230 | 2020-10-17 15:37:03 | 17201 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-11
    Description: The report provides information on the acoustic survey conducted on Lake Victoria from 18th feb-17th march 2006. The objective of the survey was to provide biomass estimates and distribution of the two main commercial species Nile Perch (above 10cm TL) AND Dagaa (Rastrineobola agentea). The rest of the species are grouped as haplochromines and others.Acoustic surveys are conducted biannually during the January/ February period when the lake is thermally stratified and during August/September period when the lake is mixed,to capture the differences in stock distribution during the two main seasons which influence fish distribution in Lake Victoria.So far, eight survey have been carried out using the same boat (R.V. Victoria Explorer) and equipment(SIMRAD EY500 echo-integrator),but with changes in survey design and data processing protocols.Environment parameters are also studied to monitor the status and understand how physical, chemical and biological processes interact and influences fisheries production.
    Keywords: Fisheries
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    Lake Victoria Fisheries Organization (LVFO) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/17206 | 4230 | 2020-10-17 15:36:16 | 17206 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-11
    Description: The 10th lake-wide hydro-acoustic survey under IFMP was conducted on Lake Victoria from 17th March – 16th April 2010 with the overall objective of estimating the standing stock of the major commercial fish stocks in the lake. Environmental and bottom net sampling were concurrently done using a CTD profiler and a bottom trawl net respectively. Two CTDs from NaFIRRI (Old and New) were used following the malfunctioning of the KMFRI CTD that has been used in all the previous surveys and is now due for service. Acoustic Data were analyzed using Echoview 4.90 software recently released by Myriax. Illustration of Spatial distribution of fish stocks and water environmental parameters were drawn in Arcview 3.2.
    Keywords: Fisheries
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  • 122
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/16947 | 4230 | 2016-02-27 15:21:09 | 16947 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: If recent estimates are accurate the world’s human population can be expected to double in the next thirty years. The rate of growth will likely be even greater in many African nations, yet food supplies in these countries especially of essential animal proteins, are even not; inadequate Clearly increased production of food for domestic consumption must become a high- prioritydevelopment goal.The inland fisheries of Africa will play an increasinglyimportant role in augmenting protein supplies. In 1970, production of the inland fisheries was already-about 1.4 million metric tons, and had increased some 71 per cent in the previous six years. With further development and more affective fishery management a two-fold increase 1n output over the present level can reasonably be expected.Effective management of the fisheries at optimum exploitation levels end development of under utilized fish resources will neccessite major improvement in the stastistical systems employed to produce information on the fish stocks and fisheries. More reliable and detailed information on the catch, effort and other important aspect of the fishing enterprises will be required.
    Keywords: Fisheries ; EAFFRO
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    Environment Agency | Warrington, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/8517 | 1256 | 2012-12-21 15:29:18 | 8517 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-03
    Description: In February 1996, the National Salmon Management Strategy was launched by the Environment Agency's predecessor the National Rivers Authority (NRA, 1996).The strategy concentrates on four main objectives for the management of salmon fisheries in Englandand Wales. These are primarily aimed at securing the well being of the stock, but in doing so willimprove catches and the associated economic returns to the fisheries. The four main objectives are :(i) Optimise the number of salmon returning to home water fisheries,(ii) Maintain and improve fitness and diversity of salmon stocks.(Hi) Optimise the total economic value of surplus stocks,(iv) Ensure necessary costs are met by beneficiaries
    Description: Environment Agency North West Archives
    Keywords: Ecology ; Fisheries ; Limnology ; England ; Kent Catchment ; Rivers ; Salmon fisheries ; Salmo salar ; Salmo trutta ; Fishery surveys ; Stock assessment ; Juveniles ; Catch statistics
    Repository Name: AquaDocs
    Type: monograph
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    Environment Agency
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/8522 | 1256 | 2012-12-21 15:27:55 | 8522 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-03
    Description: The following brief is to ensure standard criteria and format are used for the scoping and environmental assessment of water resources projects leading to the production of an environmental report or Environmental Statement. This volume is one of a series giving guidance on water resources projects. The water resources projects will predominantly comprise drought orders and permits,time limited and permanent licences. Smaller projects, such as spray irrigation licences, will not require an environmental assessment. This document forms the basis fordiscussions between the Environment Agency North East Region, consultees and the applicant. The process aims to produce a thorough assessment. Each section addresses consecutive elements of the assessment process. Section 2outlines the structure for a scoping document, section 3 outlines the structure for an Environmental Statement and section 4 gives guidance on the role of an EnvironmentalAction Plan. Appendices 1 and 2 should be used in conjunction with the scoping process and cover awide range of aspects. However, some projects may not require all of them to be included, whilst for others, the inclusion of additional factors may be appropriate.
    Description: Environment Agency Archives North West
    Keywords: Environment ; Limnology ; England ; Inland waters ; Fisheries ; Environmental monitoring ; Environmental assessment ; Environmental Impact ; Environmental legislation
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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    Environment Agency | Bristol, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10951 | 1256 | 2013-03-26 13:57:18 | 10951 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-25
    Description: This is the Salmonid & Freshwater Fisheries Statistics for England & Wales 1996 produced by the Environment Agency in 1997. The principal aim of the Environment Agency in respect of fisheries is to maintain improve and develop fish stocks, the basic fisheries resource, in order to optimise the social and economic benefits from their sustainable exploitation. This report is the second collation of salmon and migratory trout catch statistics for England and Wales produced by the Environment Agency. For the years 1989-94, these statistics were published by the National Rivers Authority (NRA) and the years 1983-88 by the Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research in its Data Report series. The 1996 data, have been presented in a broadly similar format to those of 1995. This report makes a general review of different catches: Northumbria, Yorkshire, Anglian, Thames, Southern, Wessex, South West, Severn-Trent, Welsh and North West.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Wales ; Northumbria ; Yorkshire ; Anglian ; Thames ; Southern ; Wessex ; South West ; Severn-Trent ; Welsh ; North West ; Inland waters ; Rivers ; River fisheries ; Freshwater fish ; Fishery management ; Fishery data ; Fish catch statistics ; Migratory species ; Licensing
    Repository Name: AquaDocs
    Type: monograph
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  • 126
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    Environment Agency | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10988 | 1256 | 2013-03-26 13:50:37 | 10988 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-25
    Description: This is the report on Habitats Directive, the Review of Consents Stage 1 and 2 by the Environment Agency of the West Midlands Mosses cSAC, Wybunbury Moss and Abbots Moss.The Habitats Directive has the main aim to promote the maintenance of biodiversity by defining a common framework for the conservation of wild plants and animals and habitats of community interest. The Directive establishes a European ecological network known as "Natura 2000". The network comprises Special Areas of Conservation (SAC) and Special Protection Areas (SPA). In the section on Stage 1 or Screening Process of the Habitat Directive, it is identified the likely impacts upon the West Midlands Mosses cSAC, Wybunbury Moss and Abbots Moss of a project, plan or activities, either alone or in combination with other projects, plans or activities, and considers whether these impacts are likely to be significant. In the section on Stage 2 or Appropiate Assessment of the Habitat Directive, it is considered the impact on the integrity of the West Midlands Mosses cSAC, Wybunbury Moss and Abbots Moss of the projects, plans or activities, either alone or in combination with other projects, plans or activities, with respect to the site’s structure and function and its conservation objectives. Additionally, where these are adverse impacts, an assessment of the potential mitigation of those impacts. The criteria used in this report to identify relevant projects, plans or activities and their impacts are water quality discharge consents, waste management licences, abstraction licences, Integration Pollution Control (IPC) and Integrated Pollution Prevention Control (IPPC) permits. Proformas, hydrogeological and GIS maps are included in the review.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; West Midlands Mosses ; Wybunbury Moss ; Abbots Moss ; Habitats Directive ; SAC ; SPA ; Screening ; Assessment ; Impacts ; Waste management ; Discharge licences ; Abstraction licences ; Pollution prevention ; Pollution control
    Repository Name: AquaDocs
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    Environment Agency | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11030 | 1256 | 2013-03-26 13:42:00 | 11030 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-26
    Description: This is the River Gowy and Thornton Brook improvements: Environmental Action Plan report produced by the Environment Agency in 2000. This Environmental Action Plan relates to the proposals by the Environment Agency to improve the flood defences of land adjacent to the River Gowy, about 3 km east of Ellesmere Port, Cheshire. The purpose of the Environmental Action Plan (EAP) is to provide details of how the issues addressed in the Environmental Statement (ES) will be carried through to the completion of the project. The EAP represents a commitment to the environmental recommendations formulated during the environmental assessment process and should be closely adhered to during the design, construction and post project monitoring o f the works. For any matters that cannot be finalised until during construction the constraints will be detailed in the plan so they are implemented in the contracts.
    Description: Environment Agency Archives North West
    Description: +appendices
    Keywords: Fisheries ; Limnology ; Management ; England ; River Gowy ; Thornton Brook ; Inland waters ; Environmental Action Plan ; Aquatic emergent plants
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    Environment Agency | Bristol, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11082 | 1256 | 2013-03-27 12:47:17 | 11082 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This report is the third collation of salmon and migratory trout catch statistics for England and Wales produced by the Environment Agency. For the years 1989-94, these statistics were published by the National Rivers Authority (NRA) and the years 1983-88 by the Ministry of Agriculture, Fisheries and Food, Directorate of Fisheries Research in its Data Report series. This report is designed to be a reference document of declared salmonid catches in England and Wales and is produced in the autumn following the season. Salmon stock assessment data including provisional catches, counter run estimates and some juvenile data are now published in an annual assessment for the International Council for the Exploitation of the Seas (ICES). The first report in this series was published jointly by the Environment Agency and the Centre for Environment, Fisheries & Aquatic Science (CEFAS) in April 1997 (Anon 1998).
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; UK ; England ; Wales ; Inland waters ; Rivers ; Migratory species ; Freshwater fish ; Fish counters ; Fish passes ; Fish catch statistics ; Fisheries
    Repository Name: AquaDocs
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    Environment Agency | Cardiff, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11085 | 1256 | 2013-03-27 12:46:33 | 11085 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This report presents a preliminary assessment of the state of salmon stocks and fisheries in England and Wales in 2001 to assist ICES in providing scientific advice to NASCO and to provide early feedback to fishery managers and anglers. The chief indicators of the state o f salmon stocks are normally the catches taken by rod and net fisheries. However, in 2001 angling was affected by the outbreak of foot and mouth disease (FMD), which restricted angling opportunities and access to rod fisheries in many parts of the country for lengthy periods. It is impossible to quantify the impact that FMD had on rod catches, although these were undoubtedly significantly reduced; net fisheries were unaffected by FMD. The declared salmon catch for 2001 (including those fish released alive by anglers) is provisionally estimated at 209 tonnes, representing some 57,000 fish, and comprising 153 tonnes (-43,000 fish) by nets and fixed engines and 56 tonnes (-14,000 fish) by rods. For direct comparison with previous years, it should be noted that the declared catch prior to the issue of a second reminder was about 49 tonnes (see below). An estimated 26 tonnes (43%) of the rod catch was released alive. These figures do not take account of catches of salmon which go unreported (including those taken illegally), and it is estimated that there may have been a total of 33 tonnes of additional fish caught in 2001; approximately 15% of all fish killed.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; UK ; England ; Wales ; Inland waters ; Rivers ; Migratory species ; Freshwater fish ; Fish counters ; Fish passes ; Fish catch statistics ; Fisheries
    Repository Name: AquaDocs
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    Environment Agency | Exeter, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11124 | 1256 | 2013-04-06 16:08:24 | 11124 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Exe Salmon Action Plan Final document produced by the Environment Agency in 2003. This final Salmon Action Plan (SAP) for the River Exe catchment has been produced after consideration of feedback from external consultation. The actions presented within this Salmon Action Plan clarify the important issues and factors currently limiting the salmon stock on the river. An attempt has been made to cost these actions, identify possible sources of funding and to provide a timescale for action. This SAP aims also to promote long term collaboration between the Agency and other interested parties in managing the River Exe salmon stock and fisheries. The River Exe salmon population is currently judged to be passing its Conservation Limit. However, its apparent declining trend in egg deposition in the recent years and the high uncertainty in its stock assessment suggest the following actions as priorities: actions promoting good land management, maximising salmon natural spawning activity and protecting smolts throughout the Exe catchment. Also, the lack of information on salmon stocks and its habitat quality and availability is recognised as the main factor limiting the better management of salmon fisheries. The actions presented in this document are perceived as those required to address the important issues and factors limiting the salmon stock.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Exe ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
    Repository Name: AquaDocs
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    Environment Agency | Cornwall, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11110 | 1256 | 2013-04-06 16:11:17 | 11110 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Plym Salmon Action Plan Consultation document produced by the Environment Agency in 2003. The report pays attention on the external consultation of the River Plym Salmon Action Plan (SAP). This strategy represents an entirely new approach to salmon management within the UK and introduces the concept of river-specific salmon spawning targets as a salmon management tool. The River Plym SAP follows the format of those completed for the rivers Tamar, Lynher, Tavy, Camel and Fowey. It is the sixth of seven action plans that will be produced for salmon rivers managed by Cornwall Area. The River Plym SAP contains a description of the river catchment and highlights particular features that are relevant to the salmon population and the associated fishery. Notably, there are historic workings for china clay and a significant potable water supply at Burrator Reservoir. The main River Plym has been designated as River Ecosystem class 1 for its water quality objectives. This is the highest water quality target set for rivers. This standard has been met in all reaches of the main River Plym and River Meavy.
    Description: Environment Agency Archives South West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Plym ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fish catch statistics ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
    Repository Name: AquaDocs
    Type: monograph
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    Environment Agency | Exeter, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11128 | 1256 | 2013-04-06 15:57:17 | 11128 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Taw Salmon Action Plan Final document produced by the Environment Agency in 2000. This final Salmon Action Plan (SAP) for the River Taw catchment has been produced after consideration of feedback from external consultation. The SAP provides a list of the issues and actions which were agreed for a five-year programme to maintain and improve the River Taw salmon stock. Some of these actions have already been delivered before finalising the SAP, but others have yet to be addressed. An attempt has been made to estimate the cost of the actions, identify possible sources of funding and the timescale under which they will be dealt with. The Taw salmon stock is currently failing to meet its spawning target. However, there was a period of compliance in the 1990s following a decade of failure through the 1980s. The freshwater environment of the Taw has improved in recent years. The actions presented in this SAP are perceived as those that are required to address, as far as possible, the important issues and factors currently limiting the salmon stock on the river. This SAP aims to promote long term collaboration between the Agency and other interested parties in managing the River Taw salmon stock and fisheries.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Taw ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
    Repository Name: AquaDocs
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    Format: application/pdf
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    Environment Agency | Cornwall, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11113 | 1256 | 2013-04-06 16:10:50 | 11113 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Tavy Salmon Action Plan Consultation document produced by the Environment Agency in 1999. The report pays attention on the external consultation of the River Tavy Salmon Action Plan (SAP). This strategy represents an entirely new approach to salmon management within the UK and introduces the concept of river-specific salmon spawning targets as a salmon management tool. In addition, salmon action plans have for the first time, attempted to evaluate in economic terms, all of the contributory components of the salmon fishery. The River Tavy Salmon Action Plan follows that for the River Tamar and River Lynher and is the third of seven action plans that will be produced for salmon rivers managed by the Cornwall Area FER department. The River Tavy SAP contains a description of the river catchment and highlights particular features that are relevant to the salmon population and the associated fishery.
    Description: Environment Agency Archives South West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Tavy ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fish catch statistics ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
    Repository Name: AquaDocs
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  • 134
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    Environment Agency | Cornwall, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11115 | 1256 | 2013-04-06 16:10:33 | 11115 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Yealm Salmon Action Plan Final document produced by the Environment Agency in 2003. This final Salmon Action Plan (SAP) for the River Yealm catchment has been produced after consideration of feedback from external consultation. It provides a list of the agreed issues and actions for the next five years to maintain and improve the River Yealm salmon stock. The actions presented within this Salmon Action Plan clarify the important issues and factors currently limiting the salmon stock on the river. The resolution of these issues should ensure that a sustainable salmon population will be maintained for future generations. An attempt has been made to cost these actions, identify possible sources of funding and to provide a timescale for action. The main objective of the River Yealm SAP is to maintain, improve and develop the River Yealm salmon stocks to a sustainable level that, on the basis of historic catch records, the catchment can clearly support.
    Description: Environment Agency Archives South West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Yealm ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
    Repository Name: AquaDocs
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    Environment Agency | Exeter, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11122 | 1256 | 2013-04-06 16:09:36 | 11122 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Dart Salmon Action Plan Final document produced by the Environment Agency in 2003. This final Salmon Action Plan (SAP) for the River Dart catchment has been produced after consideration of feedback from external consultation. It provides a list of the agreed issues and actions for the next five years to maintain and improve the River Dart salmon stock. The low marine survival (likely to be below 10%) is possibly to be the main cause for the River Dart salmon stock non-compliance with its conservation limit. Actions protecting smolts and maximising spawning activity of returning adults are seen as priorities to contribute to mitigate the low marine survival. Also the lack of information on salmon stock and its habitat is recognised as one main factor limiting the better management of salmon fisheries. Efforts will be focused on gaining more knowledge and improving modelling techniques. The actions presented in this document are perceived as those required to address the important issues and factors limiting the salmon stock. This SAP aims also to promote long term collaboration between the Agency and other interested parties in managing the River Dart salmon stock and fisheries.
    Description: Environment Agency Archives South West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Dart ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
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    Environment Agency | Cornwall, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11116 | 1256 | 2013-04-06 16:10:23 | 11116 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Yealm Salmon Action Plan Consultation document produced by the Environment Agency in 2003. The report pays attention on the external consultation of the River Yealm Salmon Action Plan (SAP). This strategy represents an entirely new approach to salmon management within the UK and introduces the concept of river-specific salmon spawning targets as a salmon management tool. The River Yealm Salmon Action Plan follows the format of those completed for the rivers Tamar, Lynher, Tavy, Camel, Fowey and Plym. It is the final one of seven action plans that will be produced for salmon rivers managed by Cornwall Area. The River Yealm SAP contains a description of the river catchment and highlights particular features that are relevant to the salmon population and the associated fishery. Notably there are potable water abstractions in the headwaters, workings for china clay on the main tributary, two inert waste landfill sites and an aggregate quarry adjacent to the main river and inputs from several Sewage Treatment Works (STW) and two industrial estates. The main River Yealm has been designated as River Ecosystem Class 1 for its water quality objectives. This is the highest water quality target set for rivers.
    Description: Environment Agency Archives South West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Yealm ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fish catch statistics ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
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    Environment Agency | Exeter, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11118 | 1256 | 2013-04-06 16:10:08 | 11118 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the Rivers Avon & Erme Salmon Action Plan Final document produced by the Environment Agency in 2004. The Rivers Avon and Erme Salmon Action Plan (SAP) has been produced after consideration of feedback from public consultation. The final plan provides a list of the agreed issues and actions for the next five years to maintain and improve the salmon stocks and fisheries of both rivers. Efforts have been made to identify possible sources of funding, partners and timescales. It indicates how the plan will be managed, including the process for reviewing stock status, issues, actions and progress. Low marine survival is currently a major factor limiting the numbers of salmon returning to spawn in both the Avon and the Erme. Actions to improve the accessibility of spawning areas and to maximise the productivity of spawning and nursery habitats are seen as priorities, which should help to offset the low marine survival. The quality of the information available to assess salmon stocks is recognised as a limiting factor in the management of salmon fisheries. The SAP aims also to promote long term collaboration between the Agency and other interested parties in managing the salmon stocks and fisheries of the Avon and the Erme.
    Description: Environment Agency Archives South West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; Rivers Avon & Erme ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
    Repository Name: AquaDocs
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    Environment Agency | Exeter, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11127 | 1256 | 2013-04-06 15:57:29 | 11127 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Taw Salmon Action Plan Consultation document produced by the Environment Agency in 2000. The report pays attention on the external consultation of the River Taw Salmon Action Plan (SAP). This approach to salmon management within the England and Wales introduces the concept of river-specific Conservation Limits as a method of assessing the status of the salmon stock. The River Taw Salmon Action Plan (SAP) includes a description of the current status of the rod and net fisheries and historical trends. The Taw salmon stock has declined since the 1960s and is currently failing to meet the spawning target. The decline in the spring fish component has accounted largely for the overall decrease in stocks. The reasons for the decline are unclear, but the spring fish problem is recognised as a national issue. The rate of survival over the marine phase has reduced in recent years for both the grilse and MSW components. This is undoubtedly a contributory factor, which may now constrain stocks to lower levels than have existed historically.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cornwall ; River Taw ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fish catch statistics ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
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    Environment Agency | Exeter, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11130 | 1256 | 2013-04-06 15:58:59 | 11130 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the River Teign Salmon Action Plan Final document produced by the Environment Agency in 2003. This final Salmon Action Plan (SAP) for the River Teign catchment has been produced after consideration of feedback from external consultation. This final plan provides a list of the agreed issues and actions for the next five years to maintain and improve the River Teign salmon stock. An attempt has been made to cost these actions, identify possible sources of funding, partners and the timescale under which they will be dealt with. It indicates how the plan will be managed, i.e., implemented and reviewed, and, summarises progress of on-going actions. The low marine survival (likely to be below 10%) is possibly the main cause for the River Teign salmon stock non-compliance with its conservation limit. Actions protecting smolts and maximising spawning activity of returning adults are seen as priorities to contribute to offset the low marine survival. This SAP aims also to promote long term collaboration between the Agency and other interested parties in managing the River Teign salmon stock and fisheries.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Exeter ; River Teign ; Inland waters ; Freshwater fish ; Migratory species ; Salmon Action Plan ; Fishery data ; Fishery management ; Fishery regulations ; Nature conservation ; Water quality ; Spawning targets
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    Environment Agency | Bristol, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10936 | 1256 | 2013-03-26 13:58:31 | 10936 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-02
    Description: This is the Species management in aquatic Habitats overview of sub projects and their management produced by the Environment Agency in 1998. This report was under the R&D Project, which it was initiated in 1995 to provide information on species of conservation value of particular relevance to the Environment Agency (then the National Rivers Authority, NRA), in relation to its activities affecting aquatic environments. Outputs comprise Species Action Plans (SAPs), practical management guidelines for Agency staff and third parties, and various research and survey outputs to improve the knowledge base on the status and ecological requirements of priority species. This R&D Technical Report provides an overview of the work undertaken, additionally identifying lessons to be learnt in the management of species-related research within the framework of the UK Biodiversity Action Plan. The process of species selection was initially based upon a wide ranging review of priority species of relevance to the then NRA, encompassing both highly threatened species and species that are relatively common but are at particular risk from Agency activities.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; UK ; Priority species ; Conservation ; Management ; Aquatic habitats
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    Environment Agency | Bristol, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10940 | 1256 | 2013-03-26 13:59:45 | 10940 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-02
    Description: This is the Species management in aquatic Habitats WRc Interim 1997 document produced by the Environment Agency in 1997. This document reports progress on R&D Project 640, which aims to provide information on species of conservation value of particular relevance to the Environment Agency, in relation to its activities affecting aquatic environments. A range of stand-alone outputs is being produced, comprising Species Action Plans, practical management guidelines for Agency staff and third parties, and various research outputs to improve the knowledge base on the status and ecological requirements of priority species. The species of conservation values are: water shrew, daubenton’s bat, Kingfisher, yellow wagtail, Grey wagtail, sand martin, reed bunting, dipper, marsh warbler, great crested new, spined loach, brook lamprey, river lamprey, sea lamprey, shining rams-horn snail, little whirlpool rams-horn snail, depressed river mussel, a freshwater pea mussel, native crayfish, and triangular club-rush. The process of species selection was altered during the course of the project by the report on biodiversity by the UK Biodiversity Steering Group (1995). Whilst still including species that were not particularly endangered but were greatly influenced by the activities of the Agency, the project addressed species on the ‘short’ and ‘middle’ priority lists of the Biodiversity report, particularly those for which the Agency had specific responsibilities.
    Description: Environment Agency Archives South West
    Keywords: Fisheries ; Limnology ; Management ; UK ; Priority species ; Habitat management ; Aquatic habitats
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    Environment Agency | Bristol, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10945 | 1256 | 2013-03-26 13:58:39 | 10945 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-25
    Description: This is the Habitats regulations for stage 3 assessments: radioactive substances authorisations report from the Environment Agency, published on October 2003. The report focuses on the stage 3 assessments of radioactive substances authorisations in UK (to take place over the next five years, starting in 2003), which may have a potential impact on European designated Natura 2000 sites such Special Protection Areas (SPA), Special Areas of Conservation (SAC); and thus require further detailed assessment. This Environment Agency R&D project was commissioned to ERC, University o f Liverpool, in conjunction with Westlakes Scientific Consulting and the Centre for Ecology and Hydrology, as part o f the agency's preparation for the Stage 3 Assessments o f radioactive substances authorisations. The aim was to prepare site information sheets containing all data relevant for individual Natura 2000 sites needing Stage 3 Assessment and to stylise and represent species that require protection under the Habitats Regulations by the reference organism geometries listed in R&D Publication 128 (Copplestone et al., 2001).
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; Europe ; UK ; Radioactive substances ; Conservation ; Protected areas ; Natura 2000 ; SPA ; SAC
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    Type: monograph
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    Environment Agency | Bristol, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10957 | 1256 | 2013-03-26 13:56:03 | 10957 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-25
    Description: This is the Effect of water quality on coarse fish productivity and movement in the Lower River Irwell and Upper Manchester Ship Canal: a watercourse recovering from historical pollution report produced by the Environment Agency in 2003. The aim of this study was to investigate the impact of water quality upon coarse fish population dynamics in a lowland, urban watercourse. All of the research carried was undertaken in the lower River Irwell and upper Manchester Ship Canal, between February 1998 and December 2001. Of particular interest was the natural sustainability of the urban fishery given recent concern raised in the angling community over an apparent decline in coarse fish populations in lowland rivers. The research described in this report has concentrated upon the role of water quality in determining coarse fish population dynamics, and in particular: The impact of water quality upon fish growth and productivity; The impact of poor water quality and low dissolved oxygen concentrations upon fish distribution and movement; The impact of water quality upon the sexual development of fish.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Irwell ; Manchester Ship Canal ; Inland waters ; Rivers ; Invertebrates ; Freshwater fish ; Migratory species ; Fish catch statistics ; Fish distribution ; Fish population ; Population dynamics ; Population structure ; Freshwater pollution ; Water quality
    Repository Name: AquaDocs
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    Format: application/pdf
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  • 144
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19336 | 4230 | 2021-02-13 22:56:01 | 19336 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-25
    Description: Uganda has a high potential for fish production. About 18% of the country's surface is covered by lakes, rivers and swamps which are sources of fish. The country has capacity to produce about 300,000 metric tones of fish annually. However the maximunl catch ever realized is 245,000 metric tones in 1990 after which catches declined by 1.5% from 221,900 metric tones in 1996 to 218,680 metric tones in 1997. When the stocks of Lake Victoria were investigated during a joint survey conducted by UNIJP/FAO and EAFFRO in 1969/71, the contribution of the Nile perch, Lates niloticus to the total demersal ichthyomass of the lake was then insignificant (Fisheries Department. Ann. Rpt. 1960; Bergstrand & Cordone 1971, Ssentongo & Welcomrtle 1984).
    Keywords: Fisheries
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  • 145
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    National Fisheries Resource Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19333 | 4230 | 2020-09-07 18:47:41 | 19333 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-25
    Description: To modernize the fishery sub-sector there is need to sustainably exploit the resource and manage the environment. This will transform into guaranteed incomes and food security to the fishers and other people employed in the ~ishery related activities. The overall fisheries sub-sector goal is to ensure increased and sustainable fish production and utilization by properly managing capture fisheries, promoting Aquaculture reducing post haNest losses and protecting the fish habitat. This will contribute to the overall national development. policy of poverty eradication and food security through the modernization of thedevelopment sector.
    Keywords: Fisheries
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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
    Publication Date: 2021-06-25
    Description: 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.
    Keywords: Fisheries
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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
    Publication Date: 2021-06-26
    Description: 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
    Keywords: Fisheries
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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
    Publication Date: 2021-06-25
    Description: 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
    Keywords: Fisheries
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  • 149
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    Fisheries Resources Research Institute (FIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19329 | 4230 | 2020-08-31 00:16:37 | 19329 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-25
    Description: Aquatic systems cover 18% of Uganda's surface area in form of lakes rivers and swamps. The lakes can be grouped into Major and Minor lakes. Lakes Victoria, Kyoga, Albert, Edward and George form the Major lakes. A host of small lakes many of them associated with (satellite to) the major lakes form the minor lakes. These minor lakes can further be grouped into Nabugabo lakes, Koki lakes and Lake Wamala as being associated with the Lake Victoria drainage, Kyoga minor lakes (Lakes Opeta, Bisina, Agu, Lemwa, Kawi, Nakuwa, Nawampasa etc.), the numerous western crater lakes and Lake Bunyonyi
    Keywords: Fisheries
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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
    Publication Date: 2021-06-25
    Description: 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
    Keywords: Fisheries
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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
    Publication Date: 2021-06-26
    Description: 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
    Keywords: Fisheries
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19437 | 4230 | 2020-08-31 00:09:42 | 19437 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-28
    Description: The average diet in Uganda, particularly among the poor majority of the population, is unbalanced, based on starchy food crops, resulting in apparent protein deficiency. There are indications of high prevalence of chronic malnutrition of children of 12-56 months (SSALI & SEWANKAMBO 1991). The production and consumption of protein food is still undeveloped, presenting an apparent potential and clear need in the country.There are also indications that fisheries is the sector with probably the biggest, untapped potential as source of protein food. It is can also produce the cheapest high-quality protein, particularly for those populations near the main water bodies that cover 18% of the total surface in the country. Fish has been the most important source of protein in the whole. country mainly because of its low price. Present fish consumption accounts for 4.8% of household food budget, compared to 8.7% for meat and poultry, 5.8% for milk and eggs and 9.7% for fruits and vegetables (MPED 1991c).
    Description: First Technical Report
    Keywords: Fisheries
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    Uganda Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19439 | 4230 | 2020-11-08 17:22:15 | 19439 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-28
    Description: Uganda has been able to achieve increasing growth rates of up to 7% per annum over the last five years under the Government's reforms programmes set up to redress economic imbalances through economic rehabilitation, growth and development (MPED 1987). The main objective of these reform programmes is to achieve GDP growth rate of at least 5% and reduce inflation rate to 15% by the end of June, 1993 (MFEP 1992). However, there is now the problem of sustaining this high growth rate, much of which has been achieved from the agriculture sector. Falling world prices for the major agricultural products, namely coffee and cotton, coupled with increasingly unpredictable weather conditions in the country have led to major fluctuations in the performance of the agricultural sector over the years, and thus in the overall performance of the economy. In 1991/92 financial year, for example the growth rate in the economy fell from 3.9% in the previous year to 1.8%, while within agriculture it fell from 2.6% to -1.5%. This fall has been attributed to the factors mentioned above.There has been a growing concern over this situation and the Government has been exploring' avenues for expanding and diversifying the economic base of the country away from the traditional agricultural crops.
    Keywords: Fisheries
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    Uganda Freshwater Fisheries Research Organisation | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19440 | 4230 | 2021-02-13 23:35:26 | 19440 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-28
    Description: Uganda comprises of about 241,000 km2 or 18% is water (Lakes and Rivers, swamps, dams, valley tanks and fish ponds) (MPED 1991a). It is estimated that these waters produce 219,.000 tonnes 'of fish (UFD 1991) major contributors being Lake Victoria followed by Kyoga. Other important producers include Lakes Albert, Edward and George and Albert "Nile. In terms of species composition, Nile perch and Tilapine species represent by far the most significant proportions of the catch accounting for 51% to 39% respectively (UFD 1989). Uganda has a population of 16.6 million people (1991 census) of whom 90% live in rural areas with major occupation being peasant agriculture. Thispopulation is made up of more than 52 ethnic groupings whose., diet is varied depending on cultural influences, geographical location and climate. Per capita fish consumption is estimated ,at 12 kg per annum (UFD 1990).The average diet in Uganda particularly among the poor majority of population is unbalanced, mainly based on starchy food crops as roots and . tubers, cereals and banana. There are indicators of high prevalence of 'chronic malnutrition of children of 12 -56 months (SSALI and SEWANKAMBO 1991). There are also diseases like Goitre, Rickets and Blindness in the adult population caused by nutritional defficiencies. The production and consumption of protein food is still under-developed, presenting a potential to be exploited.
    Keywords: Fisheries
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    National Fisheries Resource Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/18884 | 4230 | 2020-11-08 17:15:45 | 18884 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-12
    Description: The purpose of this brochure is to communicate research results on economic returns for fishing enterprises on Lakes Albert, Kyoga and Victoria and strategies for enhancing market access, aimed at improving incomes of fishers.
    Description: pamphlet
    Keywords: Fisheries
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    Uganda Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19443 | 4230 | 2020-10-12 18:45:44 | 19443 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-28
    Description: The overall objective of research program at the Uganda FreshwaterFisheries Research Organization (UFFRO). has been' the promotion. of sustainable development of the major fisheries resources of Uganda; namely the Nile perch, Nile tilapia and Dagaa. The institution endeavours to provide the information necessary for the rational exploitation, managementand the enhancement of an appropriately balanced mix of fish species.I〉 The Fish Commodity Systems Economics (U) Project focuses on the economic component of the program. Its overall objective is to improve performance of the fisheries sector within the framework of sustainable development It is a three year project and was officially started in June 1992, with funding from the International Development Research Centre (IDRC) of Canada. Its primary concern is with improving the main aspects of fisheries sector performance, namely contribution to the people's diet income and employment,the environment and Uganda's balance of paymentposition.
    Keywords: Fisheries
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  • 157
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    National Agricultural Research Organisation | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19457 | 4230 | 2020-10-26 06:23:50 | 19457 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-06-29
    Description: Papyrus can be used as alternative to woodfuel for smoking fish. The product is as acceptable as fish smoked with woodfuel. Smoking with papyrus offers no immediate price premium to the fish smoker but some net profit advantages may arise where costs can be reduced by its use, and where quality improvements can be obtained by the closer attention to the smoking process necessitated by papyrus. In locations where papyrus and woodfuel are both abundant there is no perceived cost advantage to the fish smoker in smoking with papyrus and papyrus is rarely seen as a possible alternative to woodfuel, even in areas of woodfuel scarcity. Given the sociological and economic values attached by the government of Uganda to riverine and lakeside forests,further efforts to disseminate knowledge ofpapyrus as an alternative fuel, and of the fuel savings to be gained in using improved kiln designs are recommended.
    Keywords: Fisheries
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    Uganda Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19617 | 4230 | 2020-10-26 04:21:28 | 19617 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: A study on the fish stocks and feeding habits of Lates niloticus in the northern portion of Lake Victoria (Uganda) was conducted during the period 1981 to 1985. A general decline in catch rates and total landings was observed. This was due to, along other factors, overfishing, use of beach seines and smaller lesh gill nets and predation on some of the species by L. niloticus. The most notable changes during the period were a sharp decline of the haplochromines and an increase of Rastrineobola argentea in commercial landings and a change in the feeding habits of L. niloticus from haplochrolines to Caridina and juvenile L. niloticus. There was also a decline in average weight of L. niloticus in both trawl catches and commercial landings.
    Keywords: Fisheries
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19626 | 4230 | 2020-10-20 04:34:42 | 19626 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: Nakivubo swamp (papyrus wetland) is located in the south east of the city of Kampala. This swamp has been receiving waste water from Nakivubo channel for more than two decades. This investigation was aimed at monitoring the level of pollutants (nutrients and faecal coliforms) as the waste water filtrates through the swamp and the flow patterns of waste water through the swamp. From this preliminarily investigation it was feund out· that the waste. water is not evenly distributed over the swamp. Also high levels of pollutants seem to filtrate through th~swamp and enter Inner Murchison Bay Lake victoria. Further research is under way to investigate in more detail the capacity of Nakivubo swamp to remove nutrients / pollutants from waste water flowing through it and the dominant mechanisms / processes involved
    Keywords: Fisheries
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    Agricultural Development Project Fishery Survey Unit | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19553 | 4230 | 2021-02-14 01:27:30 | 19553 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-01
    Description: The culture of fish in cage and pen is a comparatively new project in Uganda although it has been successfully practiced commercially in the Philippines in the raising of Tilapia and carps. As a technology transfer scheme the project is being proposed as an alternative employment both for fishermen and farmers in the rural and fishing communities around the Lake Kyoga Complex. The project can be operated as family enterprise, by cooperatives or by fishery corporations, as possible income-producing business ventures.
    Keywords: Fisheries
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  • 161
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19599 | 4230 | 2021-02-14 01:56:30 | 19599 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: East Africa, like most growing countries, is beginning tobe particularly concerned about environmental pol1ution.
    Keywords: Fisheries
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19604 | 4230 | 2020-11-09 02:43:06 | 19604 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: It is a well established feature of biological systemsthat the constituent organisms are in balance with each other.This is true of a fish population which is in balance with theother organisms of its own ecosystem, and within itself insofaras the numbers of fish entering a fish stock are approximatelyequal to those dying by natural causes.It is also true that 9 as fish grow through the population,they reach a particular size where the increase in weight in a year 9 due to the growth of all the fish in the population of that size, is balanced by the loss of weight due to natural death.The maximum yield of a fishery could thus be obtained by removing all fish as they reach this age. In practice it would require an infinite amount of fishing to accomplish this 9 and it is generalpractice in fishery management to begin cropping fish just before they reach this ideal size and age.
    Keywords: Fisheries
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    Uganda Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19618 | 4230 | 2020-11-11 19:30:12 | 19618 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: There has been a decline almost to the total disappearance and in some cases apparently the extinction of most of the native fish species of Lakes Victoria and Kyoga since the development of the fisheries of these lakes begun at the beginning of this century. The Nile perch, Lates niloticus, a large voracious predator which was introduced into these lakes about the middle of the century along with several tilapiine species is thought to have depleted stocks of other fish. But other factors, such as overfishing, changes in the habitat which can result in fish kills or affect breeding and recruitment, plus competition with other species, appear to have contributed to the diminution in the stocks of other fish.The available information indicates that by the time the Nile perch was established, the stocks of the native tilapiine species had been reduced by over fishing. The Labeo victorianus fishery had similarly been destroyed by intensive gill netting of gravid individuals on breeding migrations. L. niloticus is however, capable of depleting the stocks of species which have disappeared and could have consumed the remnants - thus preventing their recovery. It is also directly responsible for the decline in the populations of the haplochromine cichlids which were abundant over most of these lakes when it was established. The native tilapiine species were also affected by the introduced species which have similar ecologicalrequirements.
    Keywords: Fisheries
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    Uganda Freshwater Fisheries Research Organisation | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19646 | 4230 | 2021-02-14 01:40:01 | 19646 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: Fishery resources are very fragile to exploitation if the basic biological intricacies of the available stocks are not taken into account. Research enables the formulation of sound strategies and practices aimed at sustainable fisheries exploitation, management and development. The success of research strategies requires complementary mechanisms to enforce specified measures.
    Keywords: Fisheries
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    Uganda Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19647 | 4230 | 2020-11-09 03:53:57 | 19647 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: A study of species catch composition average size and geographical distribution was carried out in Napoleon Gulf, Buvuma Channel and Lungira Bay in Lake Victoria from 1981 to 1983.
    Keywords: Fisheries
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19650 | 4230 | 2021-02-14 02:27:44 | 19650 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-02
    Description: Some five years ago, two of the territories bordering on Lake Victoria, Uganda and Tanganyika began to express a desire either to abolish or modify the existing regulations controlling the fisheries in the Lake. These were felt to be unenforceable as they stood, and the expenditure on their implementation economically unjustifiable.At the same time, however, there was, notably in Kenya, an increasing unease at the obvious decline in the yields of the T. esculenta fisheries, and an increasing pressure on this organisation to undertake fish population studies and examine the true state of the fisheries. E.A.F.F.R.O. had however at that time already accumulated sufficient data on the biology of the fish stocks to enable it to issue a grave warning as to the consequences of possible de-restriction.
    Keywords: Fisheries
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    Fisheries Resources Research Institute (FIRRI) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19859 | 4230 | 2020-11-09 01:37:44 | 19859 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Fish is an important food and export commodity for Uganda and indeed the whole East African region. Fish production is driven by, among others, availability and abundance of suitable fish food resources. Invertebrate constitute one of the key food resources for different species of fish. All fish must feed on invertebrates as the first external food after absorption of the yolk sac and through most of the larval growth. A number of fishes in Lake Victoria including mukene (Rastrineobo/a argentea) and some nkejje (haplochromines) species depend entirely on a diet of invertebrates throughout life (Mwebaza-Ndawula 1998) and their productivity and fisheries primarily depends on supply of suitable invertebrate food organisms in the environment
    Keywords: Fisheries
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    East African Freshwater Fisheries Research Organization, EAFFRO | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19867 | 4230 | 2020-09-04 01:17:26 | 19867 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: The programme of work in connection with investigations into the feasibility of operating a fishery for Haplochromis has progressed, albeit with interruptions, throughout the year. An account is given in Appendix A of the boat and gear developments which have been stimulated by this survey. With conversion of the Darter to a stern trawler, fishing operations have been speeded up and a total of 85.5 trawling hours has now been completed. A summary of the catch data is set-out-in Table G1 and some comments on the distribution of species is given.
    Keywords: Fisheries
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19861 | 4230 | 2021-02-14 02:02:11 | 19861 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: A preliminary report upon a survey of the fisheries of the Tana River,Kenya undertaken during the dry season, August-September 1965, wasissued in September the same year (Mann 1965), and a shortened accountwas subsequently published (Mann 1966). However during 1967 the survey,which had been interrupted, was resumed and a second visit was made tothe area during the wet season of April-May
    Keywords: Fisheries
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19876 | 4230 | 2020-08-30 21:19:16 | 19876 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: From September 1969, the presence of a full-time librarian made possible the planning of more extensive projects with regard to the library. A large backlog of reprints and books was catalogued, in addition to material arriving currently. A detailed survey was made of the book collection andmany volumes were reclassified
    Keywords: Fisheries
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  • 171
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19872 | 4230 | 2020-10-12 18:07:12 | 19872 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: When the Lake Victoria Fisheries Research Project began, the background information necessary for the successful application of quantitative stock assessment was lacking. For this. reason and also due to the size of Lake Victoria, the complexity and variety of its many habitats, and its multispecies fishery, it was decided that initial stock assessment studies should consist of a lake wide survey using a variety of exploratory fishing methods.
    Keywords: Fisheries
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    Format: application/pdf
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  • 172
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19874 | 4230 | 2020-11-09 01:19:29 | 19874 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Whilst discussing a future tagging programme for a number of fishspecies of commercial importance in Lake Victoria, Prof. K. Lagler, atthat time Co-ordinator of African Lake Projects, FAD, suggested that forease and speed of operation the tags and tagging equipment described byDELL (1968) should be used. He very kindly provided the equipment anda number of tags of various types.
    Keywords: Fisheries
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  • 173
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19870 | 4230 | 2020-08-30 23:49:39 | 19870 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Most fishing operations are characterised by selectivity. This obscuressome qualitative and quantitative aspects of the composition of the popula.tion as reflected in the catch. In otter trawls, apart from the question ofavoidance or escapement at the mouth of the net. the most important partof selection for size of fish is the codend. However, the length of the net,along with the mesh size, determine ease of water passage and thus affectsthe efficiency of the trawl. In addition to mesh size other factors affectingcodend selection include: (1) material from which it is made, (2) weight ofthe catch. (3) duration of the haul, and (4) speed.
    Keywords: Fisheries
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  • 174
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19893 | 4230 | 2020-10-20 04:25:32 | 19893 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Lake Edward is connected to Lake George by Kazinga Channel and the commercial fisheries of this water system are dominated by Oreochromis niloticus and Bagrus docmak. However, Oreochromis niloticus is on the decline in commercial catches and yet the water system may be rich in phytoplankton, the common food for Oreochromis niloticus.
    Keywords: Fisheries
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  • 175
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19908 | 4230 | 2020-11-08 15:59:42 | 19908 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: During a survey of an area of Lake Victoria off Entebbe an echo sounder was used very extensively; this was a high frequency, transistorized model with an extra-hull transducer, suitable not only for hydrographic work but also as a fish-finding sounder. The use of echo sounders by fishermen is a relatively new innovation but they are now used extensively hydrographic in most commercial sea fisheries. So far however, work has been carried out in freshwater fisheries using these instruments. Cushing (1963) gives a clear account of the theory and general principles of the use of echo sounders for fish finding. A considerable number of "fish-traces" have been duringtlie course the hydrographic survey and an attempt has been made to interpret these traces from the point of general distribution and behaviour. However, as very little actual fishing has been done in connection with these traces the observations made must be regarded as tentative.
    Keywords: Fisheries
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  • 176
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19903 | 4230 | 2021-02-14 02:06:55 | 19903 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: At present there is no convenient key in English for the identification of the species of freshwater fish from the East African political region which includes Kenya, Tanzania and Uganda. Whilst Boulenger (1909-16), Lockley (1949), Copley (1952 and 1958) and Greenwood (1953-1958 and 1966) give keys on descriptive data relevant to this fauna, their accounts do not give complete coverage for the region. Norman's (c 1944) draft synopsis of the orders, families and genera of recent fishes unfortunately excludes the Ostariophysi and the Cichlidae, thus does not cover 12 of the most important families of African freshwater fish. Moreover Norman's key employs, for the remaining families and genera, detailed anatomical characters which are not convenient to use in the field.
    Keywords: Fisheries
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  • 177
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    E.A.F.F.R.O | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19910 | 4230 | 2020-08-30 21:12:32 | 19910 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Various departments of the Kenya Government, together with FAO consultants are co-operating in the United Nations Special Fund Scheme for developing hydro-electric and irrigation potential on the Tana River.The irrigation scheme is sited ON the south bank of the lower reaches below Garissa where a shallow but large reservoir dam will be constructed at Korakora (see Fig. C1). Hqwever, because of the limited capacity of such dam furtherreservoir dams are also considered in more suitable sites up-stream including Koreh Falls, Adamson's Falls, Mutijwa, Grand Falls, Mutonga confluence,Umbee Hill, Kindaruma, Gtaru, Thiba and Tana Reservoir
    Keywords: Fisheries
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  • 178
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    Agricultural development project fishery survey | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19924 | 4230 | 2021-02-14 01:13:53 | 19924 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: The Kyoga fisheries has been over-exploiting the stocks ofboth major species by means of harmful fishing gears. Sincethere has been some success in the removal of gears such asseines, cast nets and small-meshed gillnets from the lake, itis of interest to know how rapidly the fish stocks would beable to recover and provide better yields.
    Keywords: Fisheries
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  • 179
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    Agricultural Development Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19925 | 4230 | 2020-10-26 05:25:33 | 19925 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Keywords: Fisheries
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    Type: monograph
    Format: application/pdf
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  • 180
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19919 | 4230 | 2021-02-14 02:13:30 | 19919 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Aplocheilichthys pumilus is a small cyprinodont commonly found in shallowswampy areas around Lake Victoria. In the lagoons the species was especiallycommon in the shallow grass swamps and in the slightly deeper water amongst stands of Typha and Cyperus flanking the main lagoon.
    Keywords: Fisheries
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  • 181
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    UFFRO | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19929 | 4230 | 2020-09-04 02:32:20 | 19929 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Preliminary analyses for some of the major physicochemicalfeatures of River Nzoia, in Western Kenya, effluent to LakeVictoria are given. Some fear is expressed concerning the possible chemical, physical and consequently biological pollution from the effluents of a paper factory situated along the course of the river.
    Keywords: Fisheries
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  • 182
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    East African Freshwater Fisheries Research Organization | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19916 | 4230 | 2020-10-20 04:41:39 | 19916 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Haplochromis longirostris belongs to the piscivorous group of Haplochromis of Lake Victoria, although Greenwood (1962) and Welcomrne (1965) have bothIshown that' insects also form a significant component of the diet. The present study was intended to investigate in detail the predatory behaviour of H. longirostrisboth in aquaria and in the field, but the programme was interrupted afterIonly a few months work.
    Keywords: Fisheries
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  • 183
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    Uganda Freshwater Fisheries Research Organization (UFFRO) | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/19933 | 4230 | 2016-02-23 10:23:12 | 19933 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-05
    Description: Following the collapse of the East African Community on30th June, 1977 Ugandan fisheries research employees who werestationed in Kenya and Tanzania were recalled by the UgandaGovernment. The return of these officers strengthened the staff position of the Department. Formally the Headquarters of the East African Freshwater Fisheries Research Organization(EAFFRO), the institution was re-named the Uganda FreshwaterFisheries Research Organization (UFFRO) and the UgandaGovernment took up the full responsibility for running andmaintaining the Department. The Annual report presents activities and achievements during the reporting period 1977.
    Keywords: Fisheries
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  • 184
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Fisheries
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Fisheries
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Fisheries ; Sociology
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    Format: 220-232
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Fisheries
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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
    Publication Date: 2021-07-08
    Description: 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).
    Keywords: Fisheries
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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/20158 | 4230 | 2016-02-25 13:25:15 | 20158 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Fisheries
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    Format: application/pdf
    Format: 93-105
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  • 190
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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
    Publication Date: 2021-07-08
    Description: 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
    Keywords: Fisheries ; Law
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    Format: 233-243
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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
    Publication Date: 2021-07-08
    Description: 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
    Description: On title page: The Ugandan Version
    Keywords: Fisheries
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Fisheries ; Pollution
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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
    Publication Date: 2021-07-08
    Description: 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).
    Description: On title page: The Ugandan Version
    Keywords: Fisheries
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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
    Publication Date: 2021-07-08
    Description: 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
    Description: On title page: (The Ugandan Version)
    Keywords: Fisheries
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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
    Publication Date: 2021-07-08
    Description: 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).
    Keywords: Ecology ; Fisheries
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20280 | 4230 | 2016-03-05 09:29:52 | 20280 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: Prior to introduction of non-native fish species into Lakes Victor i a, Kyoga and Nabugabo, the three lakes suppor ted diverse fish fauna representing 13 families consisting of six cichlid genera and fifteen non-cichlid genera. There were about 50 non-cichlid species and over 300 cichlids consisting of mainly haplochromines (Graham 1929, worthington 1929, Greenwood 1960). Many of the species were commercially and scientifically important and provided a rich variety of protein source to choose from. Following introduction of the Nile perch and several tilapiines species, most of the native species were drastically reduced and some have apparently disappeared. The few remaining species appear to be restricted in distribution due to the presence of the Nile perch. They are mainly confined to refugia such as marginal macrophytes, rocky outcrops and small satellite lakes which are separated from the areas of introduction by swamps
    Description: Nile Perch (Uganda) Project: 3-P-86-0137
    Keywords: Fisheries
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20282 | 4230 | 2020-11-09 03:08:03 | 20282 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: Oreochromis esculentus (Graham, 1929) is endemic to the Victoria and Kyoga lake basins. It was the most important commercial fish species not until the introduction of gill-nets (1905 to 1916), that it declined and became very rare in the main water bodies of lakes Victoria and Kyoga. However, some populations appeared to have survived in some minor lakes in these basins which form valuable reservoirs for the species and could be used in restocking of the main lakes.
    Description: All chapters begin page 1. On title page: Ugandan version. Chapter 6.
    Keywords: Fisheries
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    Fisheries Resources Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20283 | 4230 | 2020-09-04 01:28:52 | 20283 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: In this paper, the food and feeding habits of the surviving haplochromine cichlids was examined to assess whether the diet of the different trophic groups had changed and what role the haplochromine species still surviving in the lake are playing in the overall trophic ecology of the lake.
    Keywords: Biology ; Ecology ; Fisheries
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20284 | 4230 | 2016-03-07 09:18:24 | 20284 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: Many haplochromine cichlids coexisted in Lake Victoria before the upsurge of Nileperch. The introduction of the Nile perch led to depletion of many haplochromines andother fish species in Lake Victoria. The impact of Nile perch predation onhaplochromines differed for different haplochromine trophic groups. Yssichromisfusiformis (G) and Yssichromis laparogramma (G) are among the species that havesurvived in the lake. Yssichromis spp. was studied with the aim of determining theirtrophic role, food and feeding habits. Samples were collected from Bugaia, Buvumachannel and Napoleon Gulf in the northern part of Lake Victoria. The food ofYssichromis spp. varied with size of fish. Both Y fusiformis and Y laparogramma fed onCopepods, Cladocerans, Chaoborus and Chironomids. Juvenile Yssichromis spp. fedexclusively on zooplankton comprising Cyclopoid copepods, Calanoid copepods andCladocera. The relative importance of Chironomid larvae and Calanoid copepods washigher in Bugaia than in Buvuma channel while Cyclopoid copepods and Chironomidpupae were relatively less important in Bugaia. The main food items that Yssichromisspp. fed on in Buvuma channel were Chironomid larvae Cyclopoid copepods,Cladocerans and Calanoid copepods. In Napoleon Gulf, fish caught from commercialfishery of Rastrineobola argentea (P) had fed on Chaoborus and Chironomids. Overall,Yssichromis spp. fed on more zooplankton in Buvuma than in Bugaia. Yssichromis spp.and R. argentea are presently the most abundant zooplanktivores in the northern part ofLake Victoria and are playing an important trophic role as major consumers ofzooplankton and insect larvae in the foodweb of the lake ecosystem. Yssichromis spp. arebridging the transfer of energy from the lower to the higher trophic levels as secondaryconsumers. The fishery is still not contributing to the direct conversion of the primaryproducts, the phytoplankton and detritus that were efficiently utilised by the diversehaplochromine trophic groups that existed before the Nile perch boom.
    Description: All chapters begin page 1. On title page: Ugandan version. Chapter 10.
    Keywords: Fisheries
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    Fisheries Research Institute | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/20288 | 4230 | 2016-03-05 09:38:34 | 20288 | National Fisheries Resources Research Institute, Uganda
    Publication Date: 2021-07-09
    Description: Catch effort data on which fisheries management regulations are sometimes based are not available for most lakes in Uganda. However, failure to regulate fishing gears and methodshas been a major cause of collapse of fisheries in the country. Fisheries have been damagedby destructive and non-selective fishing gears and methods such as trawling and beach seining, by use of gill nets of mesh size which crop immature fish and by introduction ofmechanised fishing. Selectivity of the gears used to crop Lates niloticus 1. (Nile perch),Oreochromis niloticus 1. (Nile tilapia) and Rastrineobola argentea (Mukene) which are currently the most important commercial species in Uganda were examined in order torecommend the most suitable types, sizes and methods that should be used in exploiting thesefisheries . Gill nets of less than 127 mm mainly cropped immature Nile ti1apia and Nile perch. To protect these fisheries, the minimum mesh size of gill nets should be set at 127 mm.Seine nets of 5 mm do catch high proportions of immature Mukene while those of 10 mmcatch mainly mature Mukene. When operated inshore, both sizes catch immature Nile perchand Nile ti1apia as by-catch. To protect the Mukene fishery and avoid catching immature byecatch,a minimum mesh size of the Mukene net should have been 10 mm operated as Lamparatype net offshore but since most fishennen have been using the 5 mm seine for over five years the minimum size should not be allowed to drop below 5 mm pending further thoroughinvestigations. Beach seining, trawling and are destructive to fisheries and should beprohibited until data that may justify their use is available.
    Description: All chapters begin page 1. On title page: Ugandan version. Chapter 11B.
    Keywords: Fisheries
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