ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2015-05-19
    Print ISSN: 1866-7511
    Electronic ISSN: 1866-7538
    Topics: Geosciences
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
  • 3
    Publication Date: 2021-05-19
    Description: Larvae of the chironomid midges (blood worms) are known as use full live food for cultured aquatics. There are endemic blood worms in sediments of the earthponds of Bafgh area at center of Iran. This study tended to identification of two chironomid species, Chironomus aprilinus Meigen, 1830 and Dicrotendipes sudanicus Freeman, 1959 & 1961, from Iran as a new record. Culture of blood worms was successful in glass thanks with 16h. light, at 24-26°C temperature. Eggs were incubated after 14 days. Suitable concentration of harvesting is 1-2 egg masses (1250eggs/m2). Enrichment of earthponds or plastis thanks including sedime is offered for culture of chironomid larvae. Collectors prepared with low cost materials are useful for collection of egg masses. May, June and July are the best time for egg collection. Large blood worms are mainly avalable in winter. Results of body analysis of the larvae indicated high dry matter with good quality.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biotechnic ; Chironomid ; Identification ; Culture ; Collector ; Brackish water ; Chironomidae ; Aquatic ; Larvae ; Blood worm ; Sediments ; Species ; Chironomus aprilinus ; Chironomus aprilinus ; Feed ; Feeding
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 48pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2021-05-19
    Description: Iran is one of ten disaster countries in terms of water crisis. Also, deficit of agricultural soil is a limiting agent for development of agronomy. Moreover, production of organic crops is very important for health nutrition. Tilapia is an important commercial fish because of its fast growth, tolerance to environmental conditions and diseases, possibility of intensive culture, low costs of production and marketable flavor. Production of aquatic and agricultural crops in an aquaponic system would ask these expectations. Aquaponic system that includes combination of hydroponics and water recycling systems was examined for modulated culture of tilapia and agricultural crops at the present study. Tilapia fries with 6.2g and 5.9g mean weight and stocking density of 40/m^3 were respectively stocked in two 2.5m^3 tanks at September 2013 for 9 months. Fish culture in the two tanks tended to 17.2kg/m^3 and 19kg/m^3 fish production with 658g and 596 mean final weigth, 98% and 100% survival and 1.4 and 1.6 food conversion rate (FCR), respectively. Plants were implanted using grow beds, floating rafts and nutrient film methods. Monthly production of mint, basil, lettuce, cucumber, tomato, pepper were 1.14, 0.5-0.8, 1.32, 2.7-4, 2.03-3.4 and 1.1 kg/m^2 crops, respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Aquaponics ; Greenhouse ; Tilapia ; Crops ; Fish culture ; Hydroponics ; Fish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 40pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2021-05-19
    Description: Rainbow trout with initial weight of25g were stocked 24 peace/m of earth ponds with 3000 m area. Each pond was divided into 2 portions with synthetic meshes and 120 days feeding trail was conducted to evaluate effects of aeration system on growth factors of this species. This project included 3 treatments and 6 repeat. Water resource was a semi deep well with salinity of II ppt and temperature of 2400C witch after enter to the earth ponds water temperature was decrease to suitable temperature for rainbow trout (lower than 2000). During the time monthly mean of water temperature was 10.270C-21.1 8QC dissolved oxygen 5.04-10.44 mg/lit and pH 8.03-9.1 L Ponds water salinity was about 11 ppt and had low change because of the low evaporation and exchange of water ponds. Feeding did with dry pellet and fish biomass was determined at fortnightly intervals and daily feed levels adjusted accordingly. At the end of period culture, growth factors (final weight, Daily growth, survival rate, feed conversion ratio and specific growth rate) were determined in model of completely randomized design by ANOVA method. Results showed that aeration in culture of rainbow trout in brackish water earth ponds has no significant effects in exchange of water ponds and growth factors.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rainbow trout ; Brackish Water ; Earth pond ; Aeration
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 71pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2021-05-19
    Description: This project was conducted in five independent experiments in appropriate tanks with suitable aeration and water fellow. Temperature: an experiment designed to evaluate the effect of temperature on growth and survival of tilapia fry by using four thermal regimes consist of 22, 25, 28 and 31 °c in three replicates. Fries with initial wight of .014 g were stocked in plastic container with 10 liter capacity at the rare of 5/liter. Fish were fed on rainbow trout commercial food at a rate of 30 % of biomass 5 times per day. The results showed that some growth indices such as final body weight, daily growth rate, specific growth rate and weight gain increased by increasing water temperature significantly. Although fry survival increased by increasing temperature but these differnces were not significant. the results suggest that in larviculture of Nile tilapia water temperatue should not be less than 28°c. Density: compressibility of Nile tilapia fry was studied by using plastic container with 13 liter capacity. Fry with initial weigh of .034 g were stocked in four treatments 10, 15, 20 and 30 fry/l with four replicates. They fed on rainbow trout food according to their biomass five times per day during the light period. The results showed that some growth indices such as average of final body weight, daily growth rate, specific growth rate and survival decreased by increasing stocking density significantly, while feed conversion rate increased by increasing stocking density. Considering the experiment, it could be suggested that lower stocking density (10/l) resulted the best growth efficiency and survival of Nile tilapia fry. On the other hand, compering the results of growth and survival rate(84%) in two stocking densites(15 and 20/l) showed that it is passible to culture Nile tilapia fry at the stocking density of 20fry/l in suitable condition. Salinity: A study conducted to evaluate the effect of salinity on growth and survival rate of Nile tilapia fry by using six salinity levels (0, 4, 8, 12, 16 and 20 ppt) with three replicates. Fry fed on rainbow trout food five times per day during the light period. Results showed that some growth indices such as average of final body weight, daily growth rate, specific growth rate and survival rate increased by increasing salinity levels up to 8 ppt significantly, and then decreased by increasing salinity levels up to 20 ppt. according to the experiment, it seems that larviculture of Nile tilapia in brackish water is available and the best results achives at 8 ppt. considering the results of growth and survival rate at 16 ppt showed that Salinity up to 16 ppt was tolerable, although reduced the growth and survival of Nile tilapia fry. Photoperiod: the objective of this study was to examine the effects of photoperiod on growth and survival rate of Nile tilapia fry by planning four treatments (6L:18D, 12L:12D, 18L:6D and 24L:0D) and four replicates. Light provided by tow fluorescent lamps those set at a distance of 60 cm above the tanks and worked by an automatic timer. Fry fed on rainbow trout food five times per day. Results showed that average of final body weight, daily growth rate and specific growth rate were loest in 6L:18D and these indices increased by increasing light duration. these differences were not significant among 6L:18D and 12L:12D. but the differences between 6L:18D with 18L:6D and 24L:0D were significant. Evaluation of survival rate showed that photoperiod did not significant effect on survival in all treatments. These finding suggests that a 12L:12D cycle be adequate in case of larval rearing. Cannibalism: An experiment designed to determine the occurrence of cannibalism among 5 different size groups of (5, 10, 20 and 30 g with fry 0.45 g) Nile tilapia population (fry / fingerling) under two stocking densities (1 / 2 and 1 / 4 fingerling / fry) with three replicates in the poly etilen tanks in brackish water condition. Fry were counted at 6, 24, 48, 72, 96, 120 and 144 hours after stocking in two methods (feeding and no feeding). In the feeding trial fingerling were fed on rainbow trout food two times per day. The results showed that cannibalism became more intense as the size difference increased. After passing time cannibalism rate increased. Also results showed increasing fry density causes increasing cannibalism in both treatments (feeding and without feeding). Feeding fingerlings (predator) was effective in reducing cannibalism.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Oreochromis niloticus ; Fry ; Temperature ; Stocking density ; Salinity ; Photo period ; Cannibalism ; Brackish Water ; Growth ; Survival ; Tilapia ; Larvae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 48pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2021-05-19
    Description: Tilapia is the second cultured fish in the world. Up to 135 countries produces tilapia. Intensive culture systems of tilapia such as cage culture are recently developed because of limitations of water resources. In Iran, studies about tilapia were started in National Research Center of Saline Water Aquatics from November 2008 and some aspects of tilapia aquaculture and culture systems are surveyed. Investigation about cage culture of Nile tilapia, Oreochromis niloticus was performed in two culture periods of 2012 and 2014 in fresh and brackish water conditions of Iran for the first time. Stocking densities of fish in the cages were 25, 50, 75, 100, 125 and 150 fish/m^3 . 100g fish stocked reached 272-331 g during 80 days in the first study. However, 50g fish stocked reached 329-450 g during 145 days in the second study. Results of cage culture of tilapia in fresh and brackish water conditions showed ranges of FCR: 1.56-3.72 and 1.08-1.87, DGR: 1.63-2.91 and 2.14-2.92 g/day, SGR: 0.63-1.12 and 1.29-1.54, production: 5.98-38 and 7.17-41.6 kg/m^3 , respectively. Stocking densities 75-125 fish/ m^3 were appropriate especially in fish reared in brackish water cages.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Tilapia ; Cage ; Culture ; Density ; Oreochromis niloticus ; Nile tilapia ; Agriculture ponds
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 44pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2021-05-19
    Description: Culture of beluga (Huso huso) in new conditions such as inland brackish water necessitates studying nutritional requirements and effects of different diets on gonadic and somatic growth as well as physiological condition. In this research 74 beluga each 4 years old cultured in brackish water of earthen ponds in Bafgh Fisheries Research Station, were selected and distributed in 8 circular cement ponds. Feeding was done in 4 formulated diets with fixed protein level and 4 energy levels (400, 425, 450, 475kcal/l00g). Samples were biopsied at the start and the end of the experiment to determine sexuality and stage of maturation. To study gonad tissues, the hematoxylin-eosin method was used. Results indicated that somatic and gonadic growth indices were affected by diets. Somatic growth overlapped in both sexes. Sexual maturation stages were not the same in males and females and transition from stage II in males was more rapid than females. Considering the results in this study, diet treatments influenced on somatic growth in both sexes and gonadic growth in females. We conclude that somatic and especially gonadic growth in brackish water is suitable. Therefore, inland brackish water environment can be regarded suitable for beluga cultivation.
    Description: Published
    Keywords: Nutritional requirements ; Inland fisheries ; Ovaries ; Cultured organisms ; Huso huso ; Brackish ; Testes ; Diets ; Growth ; Fish physiology ; Sexual maturity ; Gonads
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.91-104
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2021-05-19
    Description: Fish meal production has been fixed in the world because of a limitation in fish stocks. On the other hand, demand of fish meal is growing daily and consequent the cost, too. Therefor, attention to the other protein sources is nessesary. Some plant protein sources, especially oilseeds, have valuable potentials for replacing fish meal because of relative high production in the world and Iran and low cost. According to existing information and availability, cottonseed meal and canola meal were selected as oilseeds; and Azolla was considered whether to be controlled in north provinces of Iran as weed. Growth indices (WG and SGR), food (FCR) and protein efficiency (PER and PCE) of fingerling Nile tilapia Oreochromis niloticus were evaluated in 3 synchronous examinations with 12 treatments and 36 replications. Groups of control, canola meal (at rates of 25, 50, 75 and 100%), cottonseed meal (at rates of 15, 25, 35 and 45%), as the replacements of expensive protein sources (fish meal and soybean meal), and azolla (at rates of 13, 21 and 29% of diet) were studied. Growth indices, total food intake and protein intake of control group were higher than all diets contained plant protein sources. They decreased with plant protein increasing in every grous, separagely (p〈0.05). FCR and protein efficiency indices didn’t show any significant differences (p〉0.05) between control and canola meal (at rates of 25 and 50%), cottonseed meal (at rates of 15, 25 and 35%) and azolla (at rates of 13 and 21%). All plant protein ingredients were unpalatable, and consequent total food intake, protein consumption and growth decreased. It will be expected that Canola meal and cottonseed meal replace expensive protein sources at the rates of 50 and 35% respectively, and azolla use at the rate of 21% in diets If the problem in palatability solves.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Diet ; Black tilapia ; Replacement ; Low-cost and native materials ; Oreochromis niloticus ; Material
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 57pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2021-05-19
    Description: The aim of the present study is the environmental impact assessment of tilapia (Tilapia nilotica) farming project in brackish water of Bafgh, with goals to achieve localization of technology and knowledge of tilapia fish production, employment and the possibility to controlled development in other areas. Desired range, located in northwest of Daranjir desert (Inland Salt Water Fishes Research Station, Bafgh). Total area used for the project includes three indoor hall for breeding operation, nursery (juvenile breeding) and fattening. Besides these, three 3000 m 3 available earth ponds has been considered as a potential area breeding after setting apart the quarantine. In order to achieve sustainable development of breeding this fish, impact assessment of this project development in which both environmental and social - economic effects are considered, it seems essential and project will be accomplished more confidently. So, after considering the technical characteristics of the project, the immediate, direct and indirect impact area were determined and environmental aspects of area identified. Matrix methods was utilized for the environmental impact assessment. The most important operational activities, including greenhouse structures implementation and water conveyance facilities, including excavation and embankment, channel, piping, lining of channels and their accessories including inlet and outlet valves, concrete, stone, porcelain, walling up , roof, construction of drainage network and access roads. Based on investigation, accessibility of the region, compatibility with the other land uses, lack of monuments in the area, not covered with the sensitive habitats range, the lack of permanent river flow, low quality of underground water and end up underground water flows in downstream desert and evaporated which result in impossibility of escaping introduced fish from the farm and the use of existing spaces in the first half of the year to product lead to make fewer infrastructure costs and increase revenue, are the main criteria for the sustainable development of this species culture in the area. Considering the executed studies and results of the matrix assessment construction and operation phases, it was concluded that there is no considerable destructive impacts related to the project. Therefore due to the fact that 50% of means in rows and columns of the matrix were not less than -3.1 so, we proposed execution of it with rehabilitation plans. Therefore, some strategies and plans to consider reducing the negative effects and enhance positive effects of the project, including monitoring programs, were proposed.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental impact assessment ; EIA ; Tilapia ; Brackish water ; Tilapia nilotica
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 138pp.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...