Effect of temperature on embryonic and larval development of bream (Abramis brama L.) |
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| Authors: | Dariusz Kucharczyk Miroslaw Luczynski Roman Kujawa Piotr Czerkies |
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| Institution: | (1) Department of Fisheries, Olsztyn University of Agriculture and Technology, Oczapowskiego 5, 10-718 Olsztyn-Kortowo, Poland;(2) Department of Basic Fishery Sciences, Olsztyn University of Agriculture and Technology, Oczapowskiego 5, 10-718 Olsztyn-Kortowo, Poland |
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| Abstract: | Influence of water temperature on embryonic and larval development of bream (Abramis brama L.) was stdied. Eggs of bream were incubated at eight constant water temperatures between 13.2 and 26.8°C. The temperature
of 21.1°C gave highest hatching success, with no abnormalities in the eleutheroembryos and lowest mortality observed between
eyed egg stage and the time of hatching. Developmental rate increased with increasing temperature. Duration of embryonic development
(y; hours) decreased with increasing incubation temperature (x; °C) according to the formula: y=910.1−65.88 x+1.318 x2. Larvae were reared at eight constant temperatures ranging from 13.5 to 34.0°C. The instantaneous growth rate in wet weight
increased with increasing test temperature from 13.5 to 29.9°C, and then decreased at higher temperatures. Individual growth
of fish and biomass production rate were highest at 27.9°C. This temperature is considered optimal when food availability
and photoperiod are no limiting factors. |
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| Keywords: | Developmental rate hatching success incubation time survival growth |
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