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首页> 外文期刊>Fisheries Research >Age determination and growth of juveniles of the European hake,Merluccius merluccius (L., 1758), in the northern Tyrrhenian Sea (NWMediterranean)
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Age determination and growth of juveniles of the European hake,Merluccius merluccius (L., 1758), in the northern Tyrrhenian Sea (NWMediterranean)

机译：在第勒尼安海北部（NWMediterranean），欧洲无尾鳕（Merluccius merluccius）（L.，1758年）的年龄确定和生长

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摘要

The aim of the present study was to provide an estimation of growth of juvenile European hake, Merluccius merluccius (L., 1758) (Osteichthyes; Merlucciidae), by means of the analysis of otolith daily increments. Hake specimens were collected during trawl surveys carried out in the northern Tyrrhenian Sea (NW Mediterranean). The sagittae were removed from hakes <=20 cm total length. Left otoliths were ground and polished to obtain thin frontal sections. Otolith microstructure was analysed under a compound green light- polarising microscope. A power curve with intercept was fitted to the length-age data to describe the growth of M. merluccius. According to the growth curve, a mean length of 18 cm was reached at the end of the first year of life. The validation of the otolith increment periodicity was performed by means of two indirect methods.
机译：本研究的目的是通过分析耳石每日增加量，提供对欧洲无尾幼鱼Merluccius merluccius（L.，1758）（Osteichthyes; Merlucciidae）生长的估计。在第勒尼安海北部（地中海西北部）进行的拖网调查期间收集了无须鳕标本。从总长度<= 20 cm的无须鳕中除去矢状茎。将左耳石磨碎并抛光以获得薄的额叶部分。在复合绿光偏振显微镜下分析耳石的微结构。将具有截距的幂曲线拟合到长度-年龄数据，以描述M. merluccius的生长。根据生长曲线，生命的第一年末平均长度达到18厘米。耳石增量周期性的验证是通过两种间接方法进行的。

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