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根据性腺发育的组织切片观察,岩虫(Marphysa sanguinea)性腺发育可分为增生期、成熟期、排放期和休止期4个阶段。通过连续两年每月对岩虫性腺组织切片观察可以确定,在山东省乳山海区的岩虫性腺发育为1年1个周期。12月至翌年6月为增生期;7~8月为成熟期;7月下旬至8月为排放期;9~11月为休止期,其中7月下旬至8月中旬为繁殖盛期。岩虫的性腺起源于体腔腹面生殖上皮。生殖细胞发生时不出现滋养细胞。除休止期外,生殖细胞持续发生,成熟时多次排放。雄性生殖细胞形成合胞体(syncytium),精子为原始类型。雌性生殖细胞不形成合胞体,卵母细胞在发育的早期阶段,卵黄发生期间从卵巢(生殖上皮)排入体腔中,并在体腔中发育。卵细胞成熟时,有卵外膜,结构复杂。
According to histological sections of gonadal development, gonadal development of the rock worm (Marphysa sanguinea) can be divided into four stages of proliferation, maturation, discharge and rest. By observing the sections of rock worm gonads each month for two consecutive years, we can confirm that the rock worm gonad development in Rushan sea area of Shandong Province is one year and one cycle. December to June next year for the proliferative phase; July to August for the mature period; late July to August for the discharge period; September to November for the rest period, of which late July to mid August for the breeding season. Rock worm gonads originate in the body cavity ventral reproductive epithelium. Germ cells do not appear when the occurrence of trophoblast cells. In addition to resting periods, germ cells continue to occur, multiple discharges at maturity. Male germ cells form syncytium, the original type of sperm. Female germ cells do not form syncytia, the oocytes are excreted from the ovary (genital epithelium) into the body cavity during the development of the egg yolk and develop in the body cavity during the development of the egg yolk. Egg cells mature, there are eggs outer membrane, the structure is complex.