摘要
根据卵巢形态及切片组织学观察，把日本蟳的卵巢发育分为六期：未发育期、发育早期、发育期、将成熟期、成熟期及恢复期。分析采集的样本结合调查可知：日本的雌雄比约为１：１，繁殖季节一年二次，即４—５月份和８—９月份，产卵所需的环境条件为Ｔ２０—２８℃，ｄ１．０１５－１．０２０，ＰＨ８．０—８．２，它的产卵量较少，平均产卵量约为８．５万／只。
According to morphology of ovary and observations on histological sections, ovary development of eharybdis (eharybdis) Japonica (A. mmilne-Edwards) is divided into sixstages: undeveloped stage, early developing stage, developing stage, sub-mature stage,mature stage, and restorative stage, The results of sample analysis and investigations show that sex rate is 1: 1.The reproductive season is Twice one year from April to May and fromAugust to September.The evvironmental conditions of laying egg are temperature 20 28℃, speacial gravity 1. 015- 1. 020, and pH 8. 0-8. 2.The nummber of laid eggs is quitefew with an average of eighty-five thousands per a female.
关键词
日本XUN
繁殖
生物学
Charybdis (eharybdis) Japonica (A. Mime-Edwards),Reproduetivehabits
