水産養殖研究開発ジャーナル

概要

Assessment of Water Temperature on Growth Performance and Protein Profile of Rainbow trout Oncorhynchus my kiss (Walbaum, 1792)

Bimlendu Kumar Mishra, Monowar Alam Khalid, Shyam Narayan Labh

Thermoregulation in poikilothermic animals is influenced by thermal variations. It is known that fish ectotherms are highly influenced by thermal variability during development, which leads to important modifications at several metabolic levels such as growth and its physiology. Thus, the aim of this study was to investigate the effect of varied water temperature on growth performance and protein profiles of rainbow trout Oncorhynchus my kiss [1]. Altogether six varied temperatures as T1(8-10 o C), T2 (10-12 o C), T3 (12-14 o C), T4 (14-16 o C) , T5 (16-18 o C) and T6 (18-20 ° C) were fixed with the help of aquarium heater in 18 aquaria (three replicates) considered as six treatments and normal feeding (45% protein) were done at the rate of 3% of bodyweight twice daily for 90 days. At the end of the feeding trial cent per cent survival rate was recorded in T4 temperature treated group of fish while in other the survival rate was 99.6, 97.3, 96.4, 95.7 and 93.13% respectively. Mean weight gain (2 times) and specific growth rate (SGR) were significantly (P18°C) results in slow growth, reduce protein level and increase mortality level.