Kartal Dilek Ulaba, Yeşilçiçek Tuncay, Kalaycı Ferhat
Tirebolu District Directorate of Agriculture and Forestry, Tirebolu, Giresun, 28500, Turkey.
Department of Fishing Technology, Faculty of Fisheries, Recep Tayyip Erdogan University, Rize, 53100, Turkey.
Sci Rep. 2025 Aug 19;15(1):30333. doi: 10.1038/s41598-025-15857-1.
This study investigates, for the first time, the biological characteristics and population dynamics of the golden grey mullet (Chelon auratus) captured along the Southeastern Black Sea coast. A total of 324 specimens, comprising 142 females (43.83%) and 182 males (56.17%), were analyzed. The total lengths of all samples ranged from 16.5 to 38.8 cm, with an average size of 26.9 ± 3.714 cm, body weights varied between 37.76 and 568.56 g, averaging 172.475 ± 72.240 g. The length-weight relationships were determined as W = 0.0129TL for females, W = 0.0150TL for males, and W = 0.0158TL for overall, indicating negative allometric growth (b < 3) across sexes and overall. Asymptotic length values (L) were calculated as 45.12 cm for females, 43.97 cm for males, and 44.54 cm for overall individuals with growth performance (Φ') values of 1.390, 1.382 and 1.386, respectively. The age-length relationships were determined as L = 45.12 (1-e) for females, L = 43.97 (1-e) for males, and L = 44.54 (1-e) for overall. The condition factor (K) ranged from 0.739 ± 0.103 in June 2020 to 0.963 ± 0.054 in October 2020. The population was predominantly composed of 3-year-old individuals (40.91%), with ages spanning 1 to 6 years. The total length at first maturity (Lm) was calculated as 21.87 cm for females and 21.45 cm for males. Gonadosomatic index (GSI) analyses indicated that the reproduction period occurred from August to September. The findings of this study contribute to a deeper understanding of the biological characteristics of C. auratus. These results will provide valuable data for future comparative studies and offer essential insights for policymakers aiming to promote sustainable fisheries management and the protection of golden grey mullet stocks in the Black Sea.
本研究首次调查了在黑海东南部沿岸捕获的金鲻（Chelon auratus）的生物学特性和种群动态。共分析了324个样本，其中包括142只雌性（43.83%）和182只雄性（56.17%）。所有样本的全长范围为16.5至38.8厘米，平均体长为26.9±3.714厘米，体重在37.76至568.56克之间，平均体重为172.475±72.240克。确定雌性的体长-体重关系为W = 0.0129TL，雄性为W = 0.0150TL，总体为W = 0.0158TL，表明各性别和总体均呈负异速生长（b < 3）。计算得出雌性的渐近体长值（L）为45.12厘米，雄性为43.97厘米，总体个体为44.54厘米，生长性能（Φ'）值分别为1.390、1.382和1.386。确定雌性的年龄-体长关系为L = 45.12 (1 - e)，雄性为L = 43.97 (1 - e)，总体为L = 44.54 (1 - e)。条件因子（K）范围从2020年6月的0.739±0.103到2020年10月的0.963±0.054。该种群主要由3岁个体组成（40.91%），年龄范围为1至6岁。计算得出雌性的初次性成熟体长（Lm）为21.87厘米，雄性为21.45厘米。性腺指数（GSI）分析表明繁殖期为8月至9月。本研究结果有助于更深入地了解金鲻的生物学特性。这些结果将为未来的比较研究提供有价值的数据，并为旨在促进可持续渔业管理和保护黑海金鲻种群的政策制定者提供重要见解。
