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Study on spermatophore storage and dehiscence in crab

Abstract

【中文摘要】 甲壳动物在海洋中分布广泛,有多种精子传输方式,大部分产生精荚,粘于雌体腹部或通过交接器输送到纳精囊中[1]。研究表明,在蟹类交配、精子转移、贮存和受精等过程中,存在如精子竞争和亲体保护,多次受精等众多复杂事件[2-4]。这些过程主要是以蟹类纳精囊为核心展开,为此本文综述了纳精囊的结构和功能,精子活力的维持、精荚形态、精子竞争和转移等近年研究进展,旨为相关研究提供参考。1精荚的接受和贮存1.1纳精囊的一般结构短尾类精子贮存结构比较多样。通常蟹类在交配时获得雄蟹排出的精液,在雌蟹受精囊(sem inal receptacyles)即纳精囊(spermatheca)中贮存很长时间。蟹类的纳精囊结构都很相似,一般可分为4个区,分别为输卵管、纳精囊囊部、阴道及阴户(图1[5],图2[6])。许多蟹类的纳精囊已有过研究[7-24]。纳精囊是输卵管和卵巢相联部位前段的膨大,阴道开在纳精囊基部,开口在卵孔处。纳精囊由前端腺质层和后端几丁质区组成,其后端与具几丁质内膜的阴道相联。未交配时,纳精囊很薄、呈现白色、经度方向为透明的扁平囊[10]。前端腺体层由两层组成,最外层为很薄的上皮,呈现膜状,由有核的上皮细胞组成,内上皮很厚,... 【英文摘要】 In general,crab receives copious quantities of seminal fluid during mating,and stores them in special seminal receptacles,viz.spermatheca,for a prolonged period.The spermatheca of the advanced brachyuran crabs has been described for many species.The spermatheca is a dilation of the proximal region of the oviduct connecting it to the ovary.The vagina leads from the base of the spermatheca and opens outside the ovipore.Some crabs have the special structure,such as valve-like tissue,bursa,intermediate chamber....国家“八六三”资助项目(2002AA603013

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