【摘要】 对三疣梭子蟹胚胎切片做显微观察 ,至第二期卵内状幼体阶段才见形态结构明显的生殖腺。其外观囊状 ,内部具空腔 ,细胞排列成管状 ,开口于胚胎表面。左右两个生殖腺以管状结构相连。更多还原

【Abstract】 Gonads were observed in the section of the second egg zoea stage of swimming crabs, Portunus trituberculatus with a microscope.The gonads appearance is saclike,inside has a cavity,and cells arrange like a strand that opens to the surface of the embryo.One embryo has two gonads linking with a tube structure.更多还原