Reproductive Biology of Yellowfin Tuna (Thunnus albacares) in Tropical Western and Central Pacific Ocean
文献类型： 外文期刊
作者： Shi, Xiaofei 1 ; Zhang, Jian 1 ; Wang, Xiao 4 ; Wang, Yixi 1 ; Li, Cheng 1 ; Shi, Jiangao 5 ;
作者机构： 1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China
2.Shanghai Ocean Univ, Natl Engn Res Ctr Ocean Fisheries, Shanghai 201306, Peoples R China
3.Shanghai Ocean Univ, Minist Educ, Key Lab Sustainable Exploitat Ocean Fisheries Res, Shanghai 201306, Peoples R China
4.Shanghai Kai Chuang Deep Sea Fisheries Co Ltd, Shanghai 200082, Peoples R China
5.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
关键词： Thunnus albacares; spawning season; sex ratio; sexual maturity; gonadosomatic index
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： A total of 756 yellowfin tuna (Thunnus albacares) caught by a Chinese drifting longliner in the tropical western and central Pacific Ocean (WCPO) from May 2018 to March 2019 were investigated to describe the reproductive biology of the species. Generalized linear model and polytomous logistic regression for the ordinal response model were employed to assess the effects of biometric and spatiotemporal factors (such as individual fork length (FL), fishing depth, dissolved oxygen, and month) on the reproductive traits of yellowfin tuna. The results showed that FLs ranged from 87 to 163 cm, averaging 115.8 cm (SD = +/- 14.2) for females and 121.8 cm (SD = +/- 16.8) for males. The proportion of males in the sampled fish was 0.61 (SD = +/- 0.29), and larger males (>130 cm) were proportionally predominant. Analyses based on the monthly variation of the gonadosomatic index and monthly proportion of sexual maturity stages of the gonads showed that the main spawning period of yellowfin tuna lasts from September to December. In addition, the 50% first maturity FLs of males and females were 111.96 cm (SD = +/- 1.04) and 119.64 cm (SD = +/- 1.30), respectively. This study provides new information on the reproductive development of T. albacares in the tropical WCPO region. These reproductive parameters reduce uncertainty in current stock assessment models, which will ultimately assist the fishery in becoming sustainable for future generations.
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