Rate of heat dissipation by gametes and larval stages of Mytilus edulis |
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Authors: | M Sprung J Widdows |
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Institution: | (1) Institute for Marine Environmental Research, Natural Environment Research Council, Prospect Place, The Hoe, PL1 3DH Plymouth, Devon, England;(2) Present address: Zoologisches Institut III, Physiologische Ökologie, Universität zu Köln, Weyertal 119, D-5000 Köln 41, Germany |
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Abstract: | Heat dissipation of sperm, eggs and various stages of the planktonic larvae of the mussel Mytilus edulis L. was recorded directly at 15°C. The absolute heat dissipation increased steadily over all stages examined. The massspecific heat dissipation also increased during early embryogenesis from the fertilized egg to the D-larval stage. Starting from the early veliconcha stage, however, the mass-specific rate of heat dissipation declined from about 90 m W g-1 with increasing body size with a weight exponent of-0.35. A comparison with literature data revealed a consistently higher metabolic activity than previously estimated by indirect calorimetry for gametes and larvae. |
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