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

• Published in: Journal of the Marine Biological Association of the United Kingdom
• Main Authors: Mcevoy, Lesley Ann, Mcevoy, John
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1991
• Subjects: Aquatic Science; Scophthalmus maximus; Turbot
• Online Access: http://dx.doi.org/10.1017/s0025315400053236; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400053236

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.