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Size Fluctuation in The Eggs and Newly Hatched Larvae of Captive Turbot (Scophthalmus Maximus)

Published online by Cambridge University Press:  11 May 2009

Lesley Ann Mcevoy
Affiliation:
Department of Environmental and Evolutionary Biology, University of Liverpool, Port Erin Marine Laboratory, Port Erin, Isle of Man
John Mcevoy
Affiliation:
School of Biological Sciences, University College, Singleton Park, Swansea, SA 8PP

Extract

The aims of this study were to ascertain if individual turbot females show a seasonal decline in their egg-size when kept in conditions of constant temperature, and to relate turbot egg-size to the length and yolk-sac index of the emergent larva. Each female showed a significant seasonal egg-size decline and there was a positive correlation between egg-size and the length and yolk-sac index of the subsequent larva. However, larval length was not related to yolk-sac index, nor was the ratio of yolk-sac index: larval length related to egg-size. The maximum mean egg-size tended to increase with the female's weight and length. The implications of these findings are discussed in terms of the general ecology of turbot and its culture.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1991

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