Size-at-age and sex variability of plastic values in Ocellated wrasse, Symphodus ocellatus (Linnaeus, 1758) (Labridae, Perciformes), in northern part of the Black Sea

• Date: 2018
• Main Authors: Peskov, V.N., Manilo, L.G.
• Format: Article
• Language: English
• Published: Національний Науково-природничий музей НАН України 2018
• Series: Збірник праць Зоологічного музею
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/161321
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Size-at-age and sex variability of plastic values in Ocellated wrasse, Symphodus ocellatus (Linnaeus, 1758) (Labridae, Perciformes), in northern part of the Black Sea / V.N. Peskov, L.G. Manilo // Збірник праць Зоологічного музею. — 2018. — Вип. 49 — С. 3-15. — Бібліогр.: 30 назв. — англ.

The paper presents the results of a study of the size-at-age and sex variability of plastic characters in the late ontogenesis of Ocellated wrasse, Symphodus ocellatus (Linnaeus, 1758) from the northern part of the Black Sea. It is established, that males and females can be differentiated into small and large individuals based on absolute values of 26 plastic characters. Differences between these groups are highly reliable in all characters. According to the relative values, the differences are significant for 14 characters in males , and 6 characters in females. The expression of sex differences in S. ocellatus increases with age both in absolute and relative values of plastic characters. Among large and small individuals of the Ocellated wrasse, males are significantly larger than females. The structure of the expression and the directionality of sex differences in the Ocellated wrasse also are changed.