title: Biological observations on the crocodile shark Pseudocarcharias kamoharai.
abstract: Sex ratios and gravid characteristics were analysed for the crocodile shark Pseudocarcharias kamoharai from the tropical eastern Pacific Ocean. Gravid females ranged from 80 to 102 cm fork length (L(F) ). The mode litter size was four (two embryos per uterus), mean embryo length was linearly correlated with maternal length (r = 0·465, n = 32); there was no significant difference in L(F)  between female and male embryos.
authors.affiliation: College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China.
authors.forename: X J
authors.initials: XJ
authors.lastname: Dai
authors.forename: J F
authors.initials: JF
authors.lastname: Zhu
authors.forename: X J
authors.initials: XJ
authors.lastname: Chen
authors.forename: L X
authors.initials: LX
authors.lastname: Xu
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000818:Animals; D049628:Body Size; D005260:Female; D008297:Male; D010140:Pacific Ocean; D012098:Reproduction; D012621:Seasons; D012744:Sex Ratio; D012754:Sharks / Q000196:embryology / Q000502:physiology*; D052286:Viviparity, Nonmammalian