海洋科学2017，Vol.41Issue(7)：51-58,8.DOI:10.11759//hykx20161214005
池养黑鲷性逆转组织学观察
Histological observation of sex change in the cultivated black porgy, Acanthopagrus schlegeli
摘要
Abstract
The black porgy, Acanthopagrus schlegeli, is a popular and commonly farmed fish that undergoes a male-to-female sex change at 3 years of age. However, the process by which the black porgy changes sex remains unclear.In order to determine this process,the gonadal development and sex change of A.schlegeli at the 3–4 year mark was studied by collecting samples regularly and analyzing samples with histological methods. Results showed that in bisexual gonads, the testicular tissue developed more predominantly, and some oogonia and primary oocytes remained in the smaller ovarian tissue from January to May. Approximately 15% of 3-year-old black porgy were females during the spawning season. The testicular tissue then began to regress and ovarian tissue started to grow after the spawning periods (June–July), with full regression of the testis accompanying the development of vitel-logenic oocytes. The trend survey of the gonad dissection showed that the testicular tissue began to grow gradually at the end of September, and remained up in November and December in a subset of fish 3 years of age and older. There was an equal distribution of fish with bisexual gonads, ovaries, and testicles (each group accounted for one third of the sample population) by the end of December. In addition, annual changes in the gonado-somatic index and hepato-somatic index were analyzed. This study outlines the natural sex change process of A. schlegeli, and may provide guidance on breeding research for hermaphrodite fish.关键词
黑鲷(Acanthopagrusschlegeli)/雌雄同体/性逆转/性腺系数/肝脏系数Key words
Acanthopagrus schlegeli/hermaphrodite/sex change/gonado-somatic index/hepato-somatic index分类
农业科技引用本文复制引用
陈淑吟,张志勇,刘海林,许津,祝斐,贾超峰,张志伟,任忠宏..池养黑鲷性逆转组织学观察[J].海洋科学,2017,41(7):51-58,8.基金项目
江苏省水产三新工程重大项目(D2015-17) （D2015-17）
南通市应用基础研究计划(MS12015071, MS12015070) Aquatic Sanxin Engineering Major Project of Jiangsu Province, No.D2015-17 （MS12015071, MS12015070）
Applied Basic Research Plan of Nantong, Jiangsu Province, No.MS12015071, No.MS12015070 （）
