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热带东太平洋海域拟锥齿鲨的繁殖生物学特性
引用本文:刘维,戴小杰.热带东太平洋海域拟锥齿鲨的繁殖生物学特性[J].南方水产,2008,4(2):21-25.
作者姓名:刘维  戴小杰
作者单位:1. 海南省水产研究所,海南海口,570206
2. 上海水产大学海洋学院,上海,200090
基金项目:三大洋金枪鱼渔业科学观察员项目 , 上海市捕捞学重点学科资助项目
摘    要:研究根据科学观察员在热带东太平洋海域2次调查,调查时间和海域分别为2003年7~11月的03°S~17°S,96°W~146°W范围,2006年2~11月的05°N~10°S,134°W~173°W范围。调查共测定了202尾拟锥齿鲨(Pseudocarcharias kamoharai)的样本,并对其进行分析。结果表明,拟锥齿鲨全长(TL)与全重(W)的关系,雌性是W=9×10^-5TL^2.3116,雄性是W=9×10^-6TL^2.9007。其雌雄性比接近1:1。雌性拟锥齿鲨的总性腺重量随体长增加而增加,增加幅度较大;雌性拟锥齿鲨性成熟的最小TL约为89cm,雄性大约在85~100cm。雌体怀仔数量平均为3.85尾。出生时的TL约为40cm左右。

关 键 词:拟锥齿鲨  繁殖生物学  金枪鱼延绳钓  热带东太平洋
文章编号:1673-2227-(2008)02-0021-05
修稿时间:2007年10月9日

Reproductive biology characteristics of Pseudocarcharias kamoharai in the tropical Eastern Pacific Ocean
LIU Wei,DAI Xiaojie.Reproductive biology characteristics of Pseudocarcharias kamoharai in the tropical Eastern Pacific Ocean[J].South China Fisheries Science,2008,4(2):21-25.
Authors:LIU Wei  DAI Xiaojie
Institution:LIU Wei,DAI Xiaojie(1.Hainan Fisheries Research Institute,Haikou 570206,China;2.College of Marine Science and Technology,Shanghai Fisheries University,Shanghai 200090,China)
Abstract:Based on the scientific observer's surveys in tropical Eastern Pacific Ocean covering areas 03°S~17°S,96°W~146°W and 05°N~10°S,134°W~173°W during July~Nov.2003 and Feb.~Nov.2006 respectively,202 specimens of crocodile sharks(Pseudocarcharias kamoharai)were collected and analysed.The result showed that the relationship between total length and total weight of crocodile is W=9×10^-5TL^2.3116 for female and W=9×10^-6TL^2.9007 for male.The sex ratio of crocodile shark was nearly 1:1.Female crocodile shark's total gonad weight was increased with the growth of total length,female crocodile shark adult matured at about 89 cm,males adult about 85~100 cm.The brood of crocodile is 3.85,and size at birth is 40 cm.
Keywords:crocodile shark  Pseudocarcharias kamoharai  reproductive biology  tuna longline fishery  tropical Eastern Pacific Ocean
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