海洋科学2017，Vol.41Issue(10)：33-40,8.DOI:10.11759/hykx20170603002
中西太平洋镰状真鲨的生物学信息初步研究
Preliminary study of biological information for silky shark in the Western and Central Pacific Ocean
摘要
Abstract
The silky shark,Carcharhinusfalciformis,is a common bycatch species in the tuna longline fishery.As one of the main species in the oceanic food web,the silky shark plays an important role in maintaining the stability and diversity of the marine ecosystem.Silky sharks were listed as an endangered species in Appendix-Ⅱ of the Convention on International Trade in Endangered Species of Wild Fauna and Flora published on October 1,2017.In this study,to examine the fork length,body weight,reproduction,and feeding behavior of silky sharks,China's national tuna fisheries observers collected 1 150 specimens from the central and western Pacific Ocean (7°S-9°N,149°E-150°W).The analysis results show the following:(1) The dominant fork length of males and females was 60-150 cm and 80-180 cm,respectively.The mean female fork length was significantly larger than that of males;(2) There is no significant difference in the relationship between the fork length and round weight of male and female silky sharks (ANCOVA,P＞0.05),and this relationship can be expressed as WR =9 × 10 6 × LF2.9712;(3) The captured female-male ratio was almost 1:1;(4) The relationship between clasper length and fork length in the silky shark can be expressed by Lc =0.1492 × LF-6.5;(5) The number of embryos per litter ranged between 4-15 embryos,the average number of embryos was 8,and the total length of the embryos ranged between 24-56 cm;(6) The dominant feeding grade is level 0,followed by 1,which account for 51.77％ and 35.07％,respectively.关键词
镰状真鲨/生物学信息/中西太平洋Key words
Silky shark/biological characteristics/Western and Central Pacific Ocean分类
农业科技引用本文复制引用
丁朋朋,戴小杰,高春霞,吴峰,王腾..中西太平洋镰状真鲨的生物学信息初步研究[J].海洋科学,2017,41(10):33-40,8.基金项目
上海大学生创新创业训练计划项目(201710) （201710）
大洋渔业资源可持续开发教育部重点实验室开放基金(200908) （200908）
农业部远洋渔业观察员项目(08-25)Innovation and Entrepreneurship Training Project Program for College Student in Shanghai,No.201710 （08-25）
Open-end Fund of key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,No.200908 （）
Scientific Observer Program of Chinese Distant-water Fishery,No.08-25 （）
