Oocyte development ofMetapenaeopsis dalei(Penaeidae, Decapoda, Crustacea)
作者:
HIDEO SAKAJI,
KOTARO TSUCHIYA,
SUSUMU SEGAWA,
期刊:
Invertebrate Reproduction & Development
(Taylor Available online 2000)
卷期:
Volume 38,
issue 1
页码: 7-12
ISSN:0792-4259
年代: 2000
DOI:10.1080/07924259.2000.9652431
出版商: Taylor & Francis Group
关键词: Oocyte development;Metapenaeopsis dalei;penaeid shrimp;cortical crypt;multiple spawning
数据来源: Taylor
摘要:
Oocyte development in the small penaeid shrimpMetapenaeopsis daleiwas studied histologically. Seven stages were distinguished, namely (1) oocytes 10μm in diameter are strongly basophilic and spherical, (2) weakly basophilic ooplasm appears around the germinal vesicle, (3) follicle cells appear, (4) lipid globules appear in the ooplasm, (5) yolk granules start to appear in the ooplasm, (6) the germinal vesicle shrinks and migrates marginally, (7) the follicle cells disappear. This is the first report of a fully matured penaeid oocyte without cortical crypts which release materials forming a jelly coat when the eggs are exposed to seawater. Since ovulated oocytes occur in the same section of the ovary as earlier stages,M. daleiis concluded to be a multiple spawner which has short spawning intervals.
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