【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=9×10-5TL2.3116,雄性是W=9×10-6TL2.9007。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。更多还原

【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=9×10-5TL2.3116 for female and W=9×10-6TL2.9007 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.更多还原