上海海洋大学学报2024，Vol.33Issue(3)：715-727,13.DOI:10.12024/jsou.20230604255
金乌贼生长与性腺发育特征及初次性成熟胴长估算
Characteristics of growth and gonadal development and estimation of first sexual maturity mantle length of Sepia esculenta
摘要
Abstract
Sepia esculenta as an important cephalopod resource in China,has high economic and nutritional value.This paper was based on a trawl survey of Sepia esculenta samples collected in the central part of the East China Sea(123.0°E-127.5°E,27.5°N-31.5°N)from September of the same year to March of the following year from 2017 to 2021,and analyzed their mantle length and body mass composition,gonadal development,and the first sexual maturity mantle length L50.The results showed that the dominant mantle length groups of both female and male individuals in the Sepia esculenta are 81-120 mm and 81-140 mm,respectively;the dominant body mass groups are 41-280 g and 41-200 g,respectively.Individuals with low gonadal development in the Sepia esculenta grow faster than individuals with high gonadal development;and females grow faster than males.During the investigation period,the gonads developed over time;no I stage individuals were found in the group with a mantle length of over 161 mm.The results using the logistic equation and polynomial mantle length and body mass model to estimate L50 are:124.30 mm and 127.98 mm for females,129.18 mm and 142.44 mm for males,respectively.The L50 estimated based on the polynomial mantle length and body mass equation has a better fitting effect.The Sepia esculenta has obvious seasonal reproductive characteristics,with a breeding period of 1-3 months during the sampling period;during maturity,females transit more energy from body growth to gonadal development,and their change in growth mode is significantly earlier than males;to facilitate fishing by fishermen and ensure that all individuals have reached maturity,it is recommended that the minimum opening length of the Sepia esculenta in the central waters of the East China Sea should be greater than 142 mm.关键词
金乌贼/初次性成熟胴长/逻辑斯蒂方程/多项式模型/东海Key words
Sepia esculenta/first sexual maturity mantle length/logistic equation/polynomial model/the East China Sea分类
农业科技引用本文复制引用
薛薇,徐海龙,郭荣佩,方舟..金乌贼生长与性腺发育特征及初次性成熟胴长估算[J].上海海洋大学学报,2024,33(3):715-727,13.基金项目
国家自然科学基金青年项目(42306117) （42306117）
上海市科技创新行动计划(19DZ1207502) （19DZ1207502）
农业农村部外海渔业开发重点实验室开放课题(LOF 2018-02) （LOF 2018-02）
