Blackwell Publishing Journal Backfiles 1879-2005
Rates of maximum food consumption and growth were determined for immature mandarin fish Siniperca chuatsi (47·2—540·2 g) and Chinese snakehead Channa argus (45·0—546·2 g) at 10, 15, 20, 25, 30 and 35) C. The relationship between maximum rate of food consumption (C max), body weight (W) and temperature (T) was described by the multiple regression equations: InC max=−4·880+0·597 InW+0·284T−0·0048T2 for the mandarin fish, and In C max=−6·718+ 0·522 InW+0·440T−0·0077T2 for the Chinese snakehead. The optimum temperature for consumption was 29·6) C for the mandarin fish and 28·6) C for the Chinese snakehead. The relationship between growth rate (G), body weight and temperature was ln(G+0·25)=−0·439−0·500 lnW+0·270T−0·0046T2 for the mandarin fish, and ln(G+0·25)=−6·150+ (0·175−0·026T) lnW+0·571T−0·0078T2 for the Chinese snakehead. The weight exponent in the growth–weight relationship was −0·83 for the mandarin fish, but decreased with increasing temperature for the Chinese snakehead. The optimum temperature for growth was 29·3) C for the mandarin fish, but tended to decrease with increasing weight for the Chinese snakehead, being 30·3) C for a 45-g fish, and 26·1°C for a 550-g fish.
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