摘要
研究了卵胎生硬骨鱼褐菖 (Sebastiscusmarmoratus)的精巢结构和生殖周期。褐菖精巢属于小叶型。每年 8～ 9月 ,精巢处于精原细胞增殖期。初级精原细胞分裂增殖 ,产生次级精原细胞。后者和支持细胞组成精小囊。 10月～翌年 1月进入精子发生期。精小囊中的生殖细胞进一步发育 ,逐渐形成精子。 2～ 7月是精子退化吸收期 ,精巢中仅有初级精原细胞和残余的精子。在生殖季节 ,精子经由输出管和输精管运至尿殖突 。
The testicular structure and reproductive cycle of ovoviviparous teleost, Sebastiscus marmoratus was studied in this paper.The testes of S marmoratus are lobular type.In August and September of every year,the testes are at the stage of spermatogonic proliferation,when primary spermatogonia divide and develope into secondary spermatogonia,which and Sertoli cells form spermatogenic cysts.From October to next January,the testis enters spermatogenesis.During this stage,germ cells in the spermatogenic cysts develope into sperms gradually.February till July is the stage of sperm degeneration and absorption,when there are only primary spermatogonia and some remains of sperms.During reproductive time,sperms are transfered to urinogenital papilla via vasa efferentia and vasa deferentia,and enter the female reproductive tracts by the way of internal fertilization.
