| Abstrakt: |
The mean rate of oxygen consumption(routine respiration rate,RR, mg O2 fish−1 h−1), measured for individual or small groups of haddockMelanogrammus aeglefinus(3–12 cm standard length,LS) maintained for 5 days within flow-through respiratory chambers at four different temperatures, increased with increasing dry mass( MD). The relationship betweenRR andMD was allometric( RR = α M b) withbvalues of 0·631, 0·606, 0·655 and 0·650 at 5·0, 8·0, 12·0 and 15·0° C, respectively. The effect of temperature( T) andMD on meanRR was described byindicating aQ10 of 2·27 between 5 and 15° C. Juvenile haddock routine metabolic scope, calculated as the ratio of the mean of highest and lowest deciles ofRR measured in each chamber, significantly decreased with temperature such that the routine scope at 15° C was half that at 5° C. The cost of feeding( RSDA) wasc. 3% of consumed food energy, a value half that found for larger gadoid juveniles and adults. [ABSTRACT FROM AUTHOR] |
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