Effects of temperature, body size and feeding on rates of metabolism in young‐of‐the‐year haddock |
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| Authors: | M A Peck† L J Buckley‡ D A Bengtson§ |
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| Institution: | Graduate School of Oceanography, University of Rhode Island, South Ferry Road, Narragansett, Rhode Island, 02882, U.S.A.,; URI‐NOAA CMER Program Office, Graduate School of Oceanography, University of Rhode Island, South Ferry Road, Narragansett, Rhode Island, 02882, U.S.A. and; Department of Fisheries, Animal and Veterinary Science, University of Rhode Island Kingston, Rhode Island, 02881, U.S.A. |
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| Abstract: | The mean rate of oxygen consumption (routine respiration rate, R R, mg O2 fish?1 h?1), measured for individual or small groups of haddock Melanogrammus aeglefinus (3–12 cm standard length, L S) maintained for 5 days within flow‐through respiratory chambers at four different temperatures, increased with increasing dry mass ( M D). The relationship between R R and M D was allometric ( R R = α M b ) with b values 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 ) and M D on mean R R was described by  indicating a Q 10 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 of R R 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 ( R SDA) was c . 3% of consumed food energy, a value half that found for larger gadoid juveniles and adults. |
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| Keywords: | body size haddock juvenile respiration SDA temperature |
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