Abstract

ONAY, Hatice. First approximation of the growth and the spawning period of Symphodus ocellatus (Linnaeus, 1758) (Pisces: Labridae) in the southeastern Black Sea. Cienc. mar [online]. 2023, vol.49, e3316.  Epub Dec 08, 2023. ISSN 0185-3880.  https://doi.org/10.7773/cm.y2023.3316.

The aim of this study was to provide a first approximation of the growth, reproduction, and length-weight relationships ofSymphodus ocellatusin the southeastern Black Sea, Turkey. A total of 320 specimens (273 males, 47 females) were collected between June 2015 and May 2016, and their biological parameters were estimated for each sex and both sexes combined. Total length ranged from 6.90 to 13.70 cm and the parameters (a,b) in the power length-weight relationships werea= 0.065 andb= 2.38 for males anda= 0.102 andb= 2.20 for females. Age was successfully estimated by commonly accepted procedures for otolith analysis. The von Bertalanffy growth parameters from the otolith age estimation wereL ∞= 12.66 cm,k= 0.764, andt 0 = -1.151 (0-3 years) for males, andL ∞= 14.15 cm,k= 0.764, andt 0 = -0.188 (1-3 years) for females. The monthly gonadosomatic index values reflected a spawning period between April and July, with a spawning peak in May-June. The present study provides the first estimate of the growth and reproduction ofS. ocellatusin the southeastern Black Sea of Turkey and compares the results with those from other areas.

Keywords : condition factor; age estimation; length-weight relationship; spawning period; Symphodus ocellatus.

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