REPRODUCTIVE BEHAVIOR AND SEXUAL DIMORPHISM OF A CAPRELLID AMPHIPOD
REPRODUCTIVE BEHAVIOR AND SEXUAL DIMORPHISM OF A CAPRELLID AMPHIPOD
复制标题
圆足类足足动物的繁殖行为和性二态性
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
E. Caine
中科院分区：
文献类型：
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作者：
E. Caine
laeviuscula Mayer的生殖顺序为：配对形成-雌性蜕皮-交配-配对脱离-产卵。雄虫在交配前用第五感觉足部抱住雌虫，并在交配前剥去雌虫的外骨骼。雌性携带的卵数是雌性大小的函数，携带的幼鱼数量明显低于相同大小的雌性携带的卵数。其中一些卵可能起到了护理卵的作用。头头长度被确定为该物种性别二态性分析的最佳特征。性成熟标本中，雄性的1号和2号沉积岩差异生长较快，而雌性的3-7号沉积岩差异生长较快。除了表现出生长速度外，雌性的育儿袋和2号颌足目的插入点也表现出明显的性别二态性。这种差异可能与雌雄生殖无关，雄性的性别二态性可能是对雄性在交配前相互攻击的反应。
The reproductive sequence of Caprella laeviuscula Mayer consisted of pair formation, female molting, copulation, pair disengagement, and egg laying. The male held the female with the fifth pereiopods during precopula and removed the exoskeleton of the female prior to copulation. The number of eggs carried by the female was a function of female size, and the number of juveniles carried was significantly lower than the number of eggs carried by similarly sized females. Some of the eggs may have functioned as nurse eggs. Cephalon length was determined to be the best character for analysis of sexual dimorphism in this species. Among sexually mature specimens, males had more rapid differential growth of pereionites 1 and 2, while female pereionites 3-7 grew more rapidly. In addition to exhibited growth rates, sexual dimorphism was evident in the brood pouch of females, and in the point of insertion of gnathopod 2. The differences could not be related to male-female reproduction, and sexual dimorphism of males probably is a response to the male-male aggressive interactions during precopulation.