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Dietary l ‐lysine requirement of fingerling stinging catfish, H eteropneustes fossilis ( B loch) for optimizing growth, feed conversion, protein and lysine deposition
Author(s) -
Farhat,
Khan Mukhtar A.
Publication year - 2013
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2011.03054.x
Subject(s) - heteropneustes fossilis , lysine , biology , catfish , zoology , weight gain , protein efficiency ratio , feed conversion ratio , gelatin , amino acid , biochemistry , fish <actinopterygii> , body weight , fishery , endocrinology
Dietary lysine requirement of fingerling H eteropneustes fossilis (6.96 ± 0.05 g) was quantified by conducting 12‐week feeding trial in a flow‐through system at 28°C. Casein–gelatin based isonitrogenous (38% CP) and isocaloric (14.7 kJ g −1 DE) amino acid test diets with six levels of dietary lysine (1.5%, 1.75%, 2.0%, 2.25%, 2.5%, 3.0% dry diet) were fed to apparent satiation in triplicates. Broken‐line and second‐degree polynomial regression analyses at 95% plateau of absolute weight gain (AWG; g fish −1 ), feed conversion ratio (FCR), protein deposition (PD; g fish −1 ) and lysine deposition (LD; g fish −1 ) exhibited lysine requirement between 2.0% to 2.3% of the dry diet, corresponding to 5.3–6.1% protein.