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Effects of Temperature on the Respiratory Metabolism of Three Chesapeake Bay Bivalves

V. S. Kennedy and J. A. Mihursky
Chesapeake Science
Vol. 13, No. 1 (Mar., 1972), pp. 1-22
Stable URL: http://www.jstor.org/stable/1350546
Page Count: 22
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Effects of Temperature on the Respiratory Metabolism of Three Chesapeake Bay Bivalves
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Abstract

Respiratory rates of Macoma balthica, Mulinia lateralis and Mya arenaria were determined under an experimental design using acclimation and exposure temperatures ranging from 1 to 30 C. Rates decreased with increasing size and in general varied directly with temperature. However, high temperatures (30 C) depressed metabolism of cold-acclimated Mulinia and Mya. Very young Mya were less affected by high temperature (30 C) than were Mya a few months older. Mya and Mulinia demonstrated acclimation pattern III A. Small Macoma had pattern III B, which changed to IV C for larger animals. Macoma was least affected by high or low temperature stress, followed by Mya, then Mulinia. All three species were able to compensate for temperature change to a varying extent. Unseasonal artificial warming of the benthic environment could elevate metabolism of the species studied, which could lead to starvation if food were scarce, especially in winter.

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