Effects of temperature, body size and feeding on rates of metabolism in young-of-the-year haddock

Authors: Peck, M. A.; Buckley, L. J.¹; Bengtson, D. A.²

Source: Journal of Fish Biology, Volume 66, Number 4, April 2005 , pp. 911-923(13)

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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 Q₁₀ 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.

Keywords: body size; haddock; juvenile; respiration; SDA; temperature

Document Type: Regular paper

DOI: http://dx.doi.org/10.1111/j.0022-1112.2005.00633.x

Affiliations: 1: URI-NOAA CMER Program Office, Graduate School of Oceanography, University of Rhode Island, South Ferry Road, Narragansett, Rhode Island, 02882, U.S.A. and 2: Department of Fisheries, Animal and Veterinary Science, University of Rhode Island Kingston, Rhode Island, 02881, U.S.A.

Publication date: 2005-04-01