文章摘要
曾志南.三倍体僧帽牡蛎生殖腺发育观察[J].水产学报,1998,22(2):
三倍体僧帽牡蛎生殖腺发育观察
OBSERVATION ON GONADAL DEVELOPMENT IN TRIPLOID OSTREA CUCULLATA
投稿时间:2014-05-06  修订日期:2014-05-06
DOI:
中文关键词: 僧帽牡蛎 三倍体 生殖腺 组织学 发育
英文关键词: Ostrea cucullata, Triploid, Gonad, Histology
基金项目:
作者单位地址
曾志南 福建省水产研究所 福建省水产研究所
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中文摘要:
      在僧帽牡蛎繁殖盛期,详细观察了二倍体、三倍体僧帽牡蛎生殖腺外部形态特征,比较了成熟卵母细胞卵径和核径。结果表明,外观上三倍体生殖腺发育较二倍体差,三倍体成熟卵母细胞卵径和核径分别比二倍体大19.6%和17.6%,体积分别比二倍体增加70.3%和64.2%。组织切片检查结果:二倍体生殖腺发育正常。三倍体生殖腺发育受阻,大都在增殖期和休止期,一部分个体可发育至生长期和成熟期,并能产生成熟的卵子和精子。在三倍体中还观察到3个雌雄同体个体。三倍体雌雄性比为7∶1。此外,本文还就三倍体生殖腺发育受阻和雌雄同体现象进行了讨论。 更多还原
英文摘要:
      During the pea k perio d of it s repr oduct ion, e xter nal mo rphy log ical f eatur es o f go nad w ere under careful o bserv at ion for diploid a nd t riplo id oy ster, Ostr ea cucullata, and w ith a compar iso n of mature o ocy tes and their nuclei in size. The r esult s revealed that go nad in t riplo ids showed poo r develo pment re lat ive to diploids by appear ances, the diameter o f mature oo cytes a nd the ir nuclei of t riplo ids w ere 19. 6% and 17. 6% larger than tho se o f diplo ids, and w ith 70. 3% and 64. 2% larger in vo lume. Histo lo gical sectio ns pr esented that unlike diplo ids, gonadal development w as retarded in t riplo ids, of which the majo rity remained in sta ges of pr olifer at ion and spent , and only some of them dev eloped to growth and mature stages and produce mature o ocy tes and sperm. Three hermaphro dites wer e o bserv ed in t riplo ids sampled, w hich the sex ra tio w as female 7: ma le 1. In addit io n, retardat ion o f go na dal develo pment and hermaphro dit ic phenome no n of tr iplo ids are discussed in this paper .
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