Finding of the European Hake Merluccius merluccius (Merlucciidae) off the Black Sea Shore of Crimea

IF 0.5 4区生物学 Q4 FISHERIES Journal of Ichthyology Pub Date : 2024-03-25 DOI:10.1134/s003294522401003x

D. N. Kutsyn, I. Yu. Tamoykin, I. V. Vdodovich, T. N. Klimova, P. I. Donchik

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Abstract

The paper describes the first finding of the European hake Merluccius merluccius (Linnaeus, 1758) in the northern part of the Black Sea, off the coast of Crimea, in December 2022 with a sea surface temperature of 13°C. The individual was found in the catch of a bottom trap installed at a depth of 24 m. The specimen with a total body length of 30.6 cm and a weight of 213.5 g was a sexually mature 3 years old male. According to the results of back-calculations obtained during the analysis of the otolith section, the individual growth of the caught fish occurred as follows: the total length was 17.7, 25.5, and 30.6 cm by the end of the first, second, and third years of life, respectively. No food items have been found in the gastrointestinal tract of the caught specimen. The geographical variability of the hake life cycle is considered. The species reaches its maximum size and age at high latitudes and at low water temperatures. Presumably, the maximum size and age of the hake in the Black Sea may be slightly higher than in the Mediterranean Sea, but lower than in the Northeast Atlantic. The prospects for further resettlement and increase in the number of the hake in the Black Sea are analyzed. Apparently, low salinity and competition with the native ichthyofauna may prevent successful naturalization of the species. However, the continuation of the trend of increasing salinity of the Black Sea under warming conditions will increase the possibilities of the hake naturalization.

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在克里米亚黑海沿岸发现欧洲无须鳕（Merluccius merluccius）（Merlucciidae

摘要本文描述了 2022 年 12 月在克里米亚海岸外的黑海北部首次发现欧洲无须鳕 Merluccius merluccius (Linnaeus, 1758)，当时海面温度为 13°C。标本体长 30.6 厘米，体重 213.5 克，为性成熟的 3 岁雄性个体。根据耳石切片分析得出的反向计算结果，被捕获鱼类的个体生长情况如下：第一、第二和第三年的总长度分别为 17.7 厘米、25.5 厘米和 30.6 厘米。在捕获标本的胃肠道中未发现任何食物。考虑到无须鳕生命周期的地理变异性。该物种在高纬度和低水温条件下达到最大体型和最大年龄。据推测，黑海无须鳕的最大体型和最大年龄可能略高于地中海，但低于东北大西洋。分析了无须鳕在黑海进一步定居和数量增加的前景。显然，低盐度和与本地鱼类的竞争可能会阻碍该物种的成功归化。不过，在气候变暖的条件下，黑海盐度持续上升的趋势将增加无须鳕归化的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Ichthyology Multiple-

CiteScore

1.00

自引率

28.60%

发文量

期刊介绍： Journal of Ichthyology is an international peer-reviewed journal published in collaboration with the Russian Academy of Sciences. It covers original studies in fish taxonomy, evolution, molecular biology, morphology, species diversity, zoological geography, genetics, physiology, ecology, behavior, reproduction, embryology, invasions, and protection. Some problems of applied ichthyology are also covered. The journal welcomes manuscripts from all countries in the English or Russian language.