The Metabolic Rate of the Minnow, Phoxinus phoxinus (L.) (Pisces: Cyprinidae), in Relation to Ration, Body Size and Temperature

1 January 1988

journal article
Published by JSTOR in Functional Ecology

Vol. 2 (2) , 157
https://doi.org/10.2307/2389690

Abstract

Metabolic rate of the minnow, Phoxinus phoxinus (L.), was estimated in the laboratory at five ration levels (starvation - ad libitum) and four temperatures (5-15^⚬C); the live weight of the fish was 1-5.4 g. The metabolic rate of starved fish (R_s, J day^-1) was related to fresh body weight (W, mg) and temperature (T, ^⚬C) by the equation: R_s = aW^b1e^b2T. At each temperature, rate of feeding metabolism increased linearly with increased feeding rate. At maximum rations, total metabolic rate was 3.4-5.8 times the rate for starved fish. The following empirical equation described the relationship between rate of feeding metabolism (R_f, J day^-1), feeding rate (C, J day^-1), body weight (W, mg) and temperature (T, ^⚬C): R_f = a+b₁C+b₂(CWT).

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