Age and Growth of Diaphus brachycephalus in the South China Sea Using Sagittal Otolith Microstructure
文献类型： 外文期刊
第一作者： Tian, Han
作者： Tian, Han;Jiang, Yane;Zhang, Jun;Xu, Shannan;Chen, Zuozhi;Tian, Han;Zhu, Jiangfeng;Jiang, Yane;Zhang, Jun;Xu, Shannan;Chen, Zuozhi
作者机构：
关键词： Diaphus brachycephalus; otolith microstructure; age; growth; South China Sea
期刊名称：FISHES （ 影响因子：3.17； 五年影响因子：3.098 ）
ISSN：
年卷期： 2022 年 7 卷 4 期
页码：
收录情况： SCI
摘要： To obtain the growth and age characteristics of Diaphus brachycephalus in the South China Sea (SCS), specimens of D. brachycephalus were collected by a mid-water trawl in January and June 2015. The relationship between standard length (L) and body weight (W) was W = 0.00002699L(2.8789), with no significant differences between the two survey stations and the sexes. Microscopic observation of the sagittal otoliths revealed that the daily growth increments in each period were divided into the central zone, middle zone, and external zone. The age was determined by summing the daily growth increments of the three areas. The von Bertalanffy growth curve fitted to the relationship between age and L was shown as: L = 65.6[1 - exp{-0.0132(t - 6.94)}], r(2) = 0.935. The growth rate decreased from juvenile to adult, with a maximum rate of 0.436 mm day(-1). The back-calculated hatching dates of specimens were speculated to be from March to November, but predominantly occurred from April to May and from September to October.
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