Abstract
Routine metabolic rates of green sturgeon (Acipenser medirostris) from hatching to 31 days post hatch (dph) were determined under normoxic conditions. During the endogenous feeding stage that comprised period from hatching to 15 dph, the oxygen consumption rate (MO2, μg O2 larva−1 h−1) increased 5-fold before yolk reserves became exhausted and MO2 rates steady. The allometric relationships between MO2 and body mass had mass exponents greater than 1.0 (b=1.64±0.21) and equal to 1.0 (b=1.04±0.07) during the endogenous and exogenous feeding phases, respectively. The magnitude and changes of MO2 rates in green sturgeon larvae reflected their early ontogeny, especially during the endogenous feeding phase when the increase in metabolic rates was associated with organogenesis, acquisition of organ functions, and the conversion of yolk sac into new tissues.
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Gisbert, E., Cech, J. & Doroshov, S. Routine metabolism of larval green sturgeon (Acipenser medirostris Ayres). Fish Physiology and Biochemistry 25, 195–200 (2001). https://doi.org/10.1023/A:1022260627062
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DOI: https://doi.org/10.1023/A:1022260627062
- green sturgeon
- larvae
- metabolic rate
- respirometry
- routine metabolism