Abstract
Studies on the effects of temperature on the activities of Embden-Meyerhof (EM) glycolysis, and the hexose monophosphate shunt (HMP) in fishes have dealt mainly with exotic and/or acclimated fishes. This study reports the effects of short-term reductions in temperature on EM and HMP activity in two closely related species of temperate fishes (Sebastes spp.) and its possible relation to the thermal distribution of the species. Thermal distribution data were collected by SCUBA for S. mystinus and S. serranoides in King Harbor, Redondo Beach, California, USA. Activities of the pathways were determined in liver-tissue studies, using glucose-14C and liquid scintillation techniques following the method of Hochachka (1968) with modifications. The data were analyzed by distribution-free methods. Tissue studies indicated HMP activity in both species at lowered temperature (5°C), but only in S. serranoides at 15°C. Results indicate that S. mystinus is capable of instantaneous temperature compensation, possibly related to its tendency to occupy cold waters.
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Communicated by J.S. Pearse, Santa Cruz
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Helly, J.J. The effect of temperature and thermal distribution on glycolysis in two rockfish species (Sebastes). Mar. Biol. 37, 89–95 (1976). https://doi.org/10.1007/BF00386783
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DOI: https://doi.org/10.1007/BF00386783