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The food of common bream (Abramis brama L.) in a biomanipulated water supply reservoir Texto completo
2012
Zapletal, T., Mendelova Univ., Brno (Czech Republic). Ustav Zoologie, Rybarstvi, Hydrobiologie a Vcelarstvi | Mares, J., Mendelova Univ., Brno (Czech Republic). Ustav Zoologie, Rybarstvi, Hydrobiologie a Vcelarstvi | Jurajda, P., Akademie Ved, Brno (Czech Republic). Ustav Biologie Obratlovcu | Vsetickova, L., Akademie Ved, Brno (Czech Republic). Ustav Biologie Obratlovcu
Food composition of Abramis brama was studied in the shallow, meso-eutrophic Hamry reservoir (Czech Republic). Fish were sampled during the daytime in the pre-spawning period (April), the post-spawning (June), summer (July) and autumn (October) in 2011. The bream sampled comprised two main size groups: small (124-186 mm) and large (210-315 mm) standard length. Twenty specimens of each size group (except April - 40 large fish) were taken for analysis on each sampling occasion. Food composition was evaluated using gravimetric methods. Over the whole season, detritus and aquatic vegetation were the dominant dietary items taken. During summer, the diet of large bream comprised mainly aquatic vegetation. Benthic macroinvertebrates and zooplankton formed a minor part of bream diet over the whole season. Specific food habits of bream could be explained by specific conditions within the reservoir and available food resources.
Mostrar más [+] Menos [-]Nutritional value of five marine phytoplankton species isolated from Philippine water as food for the larvae of Penaeus monodon Texto completo
1983
Feeding experiments were conducted to test the nutritional value of five marine phytoplankton species namely: Chaetoceros calcitrans, Tetrasemis sp., Dunaliella sp., Nannochloris sp. and Chlorella sp. isolated from panay , Philippines to the larvae of Penaeus monodon from nauplius to Mysis. Proximate analyses and determination fatty acid composition were made on the larvae were directly related to the level of Polyunsaturated fatty acids in the legal diets. Best results were obtained with Chaetoceros calcitrans, Tetraselmis sp. and Dunaliella sp as food.
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