%0 Journal Article
%T Structural Characteristics of Normal and Abnormal Embryos Attachment of Eriocheir sinensis
中华绒螯蟹正常附着胚胎与流产胚胎的结构特点
%A YING Xue-ping
%A
应雪萍
%J 动物学研究
%D 2005
%I Chinese Academy of Sciences
%X The structural features of normal and abnormal embryo attachment systems of the Chinese mitten crab Eriocheir sinensis were investigated by scanning electron microscopy. The results showed that the volume of in cubation fluid inthe brooding chamber increased 15 minutes after egg-laying, immersing the embryos in the incubation fluid and thus the egg envelop became very sticky immediately. The egg stalk was largely formed within 30 minutes and completed within 80 to 140 minutes after egg-laying, so that the egg envelop became strongly adherent to the ovigerous hairs. In normal embryos, the egg stalks were highly twisted and the embryos were attached to the ovigerous hair by the egg stalk or funiculus. Many villiform were found on egg stalks and a lot of mucus was also found on the ovigerous seta. In abnormal egg stalks, villiform were never found, though numerous epibionts were attached to the embryo surface and egg stalk. The mucus of ovigerous hair and the villiform of egg stalks may contribute to egg attachment. Because of the epibionts the structure of egg investment coat egg stalk and funiculus were changed, enhancing the attrition between embryos and making embryo respiration difficult. The death and loss of embryos occur because of the above reasons.
%K Eriocheir sinensis
%K Embryo loss
%K Scanning electron microscopy
%K Embryo attachment
中华绒螯蟹
%K 流产
%K 扫描电镜
%K 胚胎附着
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=7C502F1A6798ACE1B8C57E291C48C7F1&aid=C3436A935CB2320F&yid=2DD7160C83D0ACED&vid=96C778EE049EE47D&iid=E158A972A605785F&sid=9BA67A0B76A3DBA8&eid=E57FE519484CFB70&journal_id=0254-5853&journal_name=动物学研究&referenced_num=0&reference_num=20