Abstract

Visual observations performed by members of the International Public Organization Association of Underwater Activities of Crimea and Sevastopol have allowed for obtaining the abundance characteristics of brown meagre (Sciaena umbra Linnaeus, 1758) in the Crimean Black Sea waters. There have been 290 observations completed with an average duration of 4 h each and 64 fish specimens examined with a length (SL) of 31.4 ± 0.9 cm and weight of 830 ± 65 g in adult fish and SL 13.5 ± 0.2 cm and weight of 78 ± 4 g in juveniles. The state of the species has not been evaluated as threatened. The distribution density is 2000–3100 ind./ km². Adult fish up to 4 years old and ≤1000 g in weight account for 70% of the shoaling stock; individuals more than 1500 g in weight are few in numbers. Juveniles commonly form separate aggregations.

中文翻译：

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基于呼吸暂停潜水的视觉水下观测的黑海克里米亚半岛海岸上的布朗微弱的夏亚（Sciaenidae）的新数据

摘要

国际公共组织克里米亚和塞瓦斯托波尔水下活动协会的成员进行的目视观察已经获得了克里米亚黑海水域中褐色微薄鱼的丰度特征（Sciaena umbra Linnaeus，1758年）。已完成290次观察，平均每次持续4h，检查了64条鱼标本，成年鱼的长度（SL）为31.4±0.9 cm，重量为830±65 g，SL为13.5±0.2 cm，重量为78幼体±4 g。该物种的状态尚未被评估为受威胁。分布密度为2000–3100 ind./ km ²。年龄在4岁以下且重量≤1000g的成鱼占浅滩存量的70％；体重超过1500克的人数量很少。少年通常形成单独的聚集体。