浙江沿海尖头斜齿鲨生物学特征的初步研究  

Preliminary study on biological characteristics of spadenose shark,Scoliodon laticaudus,caught from coastal waters of Zhejiang province

作　　者：朱江峰[1] 戴小杰[1] 李延[1] 

机构地区：[1]上海海洋大学海洋科学学院,上海200090

出　　处：《上海水产大学学报》2008年第5期635-639,共5页Journal of Shanghai Fisheries University

基　　金：上海市重点学科建设项目(T1101);上海水产大学青年科研基金项目(05-0148)

摘　　要：根据2005年2-3月、2006年10-12月和2007年1月、4-5月收集于浙江沿海的尖头斜齿鲨样品,初步分析长度、体重、肝重和翅重指数、摄食、成熟度等生物学特征。结果表明:全长与体重呈幂函数关系(W=5×10-5TL2.62),全长与叉长、全长与吻-尾基凹洼长(PCL)均呈线性相关。雌、雄性的摄食等级无明显差异,摄食强度普遍较低。肝重指数随个体的增大明显升高,而翅重指数随个体的增大变化不大。成熟雌性的全长范围为465～765mm,平均长度573mm(TL);成熟雄性的全长范围为476～761mm,平均长度579mm(TL),成熟雄性左右鳍脚均长54.6mm。Based on the specimens of spadenose shark, Scoliodon laticaudus, caught from coastal waters of Zhejiang Province during Feb. from Mar. 2005, Oct. from Dec. 2006, Jan. and Apr. fromMay. 2007, biological characteristics were analyzed. The relationship between total length （TL） and body weight （W） can be modeled as W=5×10^-5 TL^2.62, and relationship between total length and fork length （ FL）, total length and precaudal length （PCL） may also be fitted by simple linear models. No obvious differences were found between feeding intensity of females and males, and the feeding intensity of majority of specimens was relatively low. The hepatosomatic indices （HSI） increased as the individuals grew, while the fins weight indices （FWI） did not. The size at sexual maturity was 465 -765 mm （TL） for females, with the average of 573 mm （TL） , and 476 -761 mm（TL） for males, with the average of 579 mm （TL）. The mean length of the left and right claspers for mature males is 54.6 mm （TL）.

关 键 词：尖头斜齿鲨 浙江 沿海 生物学特征 成熟度 

分 类 号：S931.1[农业科学—渔业资源]