Premium
Higher water temperature enhances dietary carbohydrate utilization and growth performance in Labeo rohita (Hamilton) fingerlings
Author(s) -
Alexander C.,
Sahu N. P.,
Pal A. K.,
Akhtar M. S.,
Saravanan S.,
Xavier B.,
Munilkumar S.
Publication year - 2011
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/j.1439-0396.2010.01095.x
Subject(s) - labeo , carbohydrate , protein efficiency ratio , zoology , biology , amylase , feed conversion ratio , lactate dehydrogenase , food science , biochemistry , fish <actinopterygii> , enzyme , fishery , body weight , endocrinology
Summary A 60‐day experiment was conducted to delineate the effect of three dietary levels of gelatinized carbohydrate (GC) on growth, nutrient‐utilization and body composition of Labeo rohita fingerlings (avg. wt 6.5 ± 0.3 g) reared at two water temperatures (ambient‐AT (26 ± 0.8 °C) and 32 °C). Two hundred and sixteen fingerlings were randomly distributed into six treatments in triplicates. Three semi‐purified isonitrogenous diets were prepared with graded levels of GC viz. D 1 : 40%, D 2 : 50% and D 3 : 58%. Growth rate, feed efficiency and protein efficiency ratio were significantly (p < 0.05) higher in 50% GC and 32 °C reared groups than their AT counterparts. Hepato Somatic Index was higher in AT reared groups compared to 32 °C reared counterparts. Apparent digestibility co‐efficient of carbohydrate was significantly (p < 0.05) higher at 32 °C reared groups but decreased with increasing carbohydrate (GC) levels. Fish reared at 32 °C showed significantly (p < 0.05) higher amylase, protease and hexokinase activities while glucose‐6‐phosphate dehydrogenase and glucose‐6‐phosphatse were significantly (p < 0.05) higher at ambient temperatures. The results obtained in present study indicated that L. rohita could utilize higher level (50%) of dietary carbohydrate at 32 °C.