原著論文
駿河湾産サクラエビSergia lucens (Hansen) の産卵生態に関する研究 （2） 頭胸甲長と産卵数と卵径の変化
2012 年 59 巻 2 号 p. 82-87
詳細
2012 年 59 巻 2 号 p. 82-87
Reproductive features of Sergia lucens of the 1993 and 1995 year-classes were investigated during the spawning season from June to November, 1994 and 1996. Mean carapace length of the 1995 year-class was smaller than the 1993 year-class, presumably due to lower temperature in the environment. The relationship between fecundity and egg size was correlated with low fecundity and large eggs in the early spawning period and with high fecundity and small eggs during the highest spawning period. The fecundity however lowered when the carapace length exceeded 12.0 mm during the late spawning period. Total fecundity of one individual during its lifetime was estimated to be 12000–13500. The fact that shrimp size and fecundity varies among year-classes is invaluable information for management and conservation from the fishery resources point of view.
