Abstract

Based on the Russian fishery-biological data, an attempt was made to assess the stock status of Atlantic bonito Sarda sarda in the northeastern part of the Atlantic Ocean using the length-based spawning potential ratio (LBSPR) method. Values of the parameters of the Bertalanffy equation are calculated for Atlantic bonito: the theoretical maximum length of an individual is 75.6 cm and growth coefficient is 0.41. The values of the length where 50 and 95% of the fish are mature are 44.7 and 57.0 cm, respectively. The resulting estimate of the spawning potential ratio (0.28) is lower than the biological target reference point (0.40) and formally indicates an overfishing status of the stock.

中文翻译：

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对大西洋东北部大西洋Bon鱼（Sarda sarda）种群状况的初步评估

摘要

根据俄罗斯的渔业生物学数据，尝试使用基于长度的产卵潜力比（LBSPR）方法评估大西洋东北部的Atlantic鱼Sarda sarda的种群状况。贝塔朗菲方程的参数值是针对大西洋鱼计算的：一个人的理论上最大长度为75.6厘米，生长系数为0.41。50％和95％的鱼成熟的长度值分别为44.7和57.0 cm。所产生的产卵潜力比（0.28）估计值低于生物目标参考点（0.40），并正式表明种群的过度捕捞状况。