摘要
通过观察体腔生殖细胞发育的季节变化,研究广西海区方格星虫繁殖周期。研究样本采自北海市大冠沙至白虎头海区3个站点,1999年1月至2000年2月每月定期采集。观察结果表明,方格星虫雌雄异体;体腔内的生殖细胞最初成团附着在具有运动能力的滋养细胞上,卵原细胞经过细胞增殖期(1～2μm)、细胞质生长期(3～30μm)、滤泡膜形成期(30～70μm)、胶质膜形成期(70～160μm)和成熟期(≥160μm)5个发育时期;精原细胞的发育经过细胞增殖期、细胞生长期、细胞分化期和成熟期4个发育时期。方格星虫体腔内全年都有生殖细胞存在,卵细胞分期成熟,分批产卵。广西海区方格星虫繁殖期于每年4-9月,繁殖盛期为5-8月。
The development of germ cells of peanut worms, Sipunculus nudus, proceeding with seasonal alternating was observed by optical microscope to study reproductive cycle of the population in the sea of Guangxi. Samples were collected monthly from January 1999 to February 2000 at three sites along the coastal sea from Daguansha to Baihutou in southern Beihai. Observations in this study have bring to light as follow: All individuals observed were dioecious. The earliest germ cells of both males and females were small in size and appeared in clumps attached to nurse cells of motive activity. The oocytes underwent five stages of development: cell multiplication (1-2μm in diameter), plasmic growth (3-30μm), follicle formation(30-70μm ), jelly coat formation(70-160μm) and mature egg with germinal vescle disappeared (≥160μm). The spermatocytes underwent 4 stages: cell multiplication, plasmic growth, cell differentiation and maturity. The germ cells were found in the coelom all the time of a year. The spawning of this population in Guangxi's sea area took place several times from April to September each year and peaked from May to August.
出处
《水产学报》
CAS
CSCD
北大核心
2002年第6期503-509,共7页
Journal of Fisheries of China
基金
广西科学院科技基金(9806)
广西自然科学基金(0009015)
