偏顶蛤的性腺发育和生殖周期
DOI:
CSTR:
作者:
作者单位:

1. 大连海洋大学 水产与生命学院, 辽宁 大连 116023; 2. 农业部北方海水增养殖重点实验室, 辽宁 大连 116023

作者简介:

宁军号(1988–), 男, 硕士研究生, 主要从事水产动物繁育方面研究. E-mail: ningjunhaook@126.com

通讯作者:

中图分类号:

S917

基金项目:

国家海洋局海洋公益项目(201105016); 辽宁省科技攻关重大项目(2011203003).


Gonadal development and the reproductive cycle of Modiolus modiolus
Author:
Affiliation:

1. College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China; 2. Key Laboratory of Mariculture & Stock Enhancement in the North China Sea, Ministry of Agriculture, Dalian 116023, China

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为了探讨偏顶蛤的繁殖规律, 自 2013 年 10 月至 2014 年 9 月, 每月采集大连海区野生偏顶蛤(Modiolus modiolus)样品 1 次, 测定采样点水温, 采用组织学方法分析其性腺的季节变化。结果表明, 偏顶蛤性腺发育以 1 年 为 1 个周期, 可分为增殖期、生长期、成熟期、排放期、休止期 5 个时期。偏顶蛤卵子的发生可分为卵原细胞期、 生长初期、生长中期、生长后期和成熟期。雄性生殖细胞的发生经历了精原细胞、初级精母细胞、次级精母细胞、 精细胞和精子等时期, 精原细胞分为 A 型和 B 型 2 种类型。该海区偏顶蛤性腺指数和肥满度最低值均出现在 1 月, 分别为 17.54%和 18.23%; 二者最高值均出现在 8 月, 分别为 32.25%和 38.43%。偏顶蛤繁殖期为 6—11 月, 繁殖期 水温在 16.8~22.1℃; 雌雄性腺发育基本同步, 雄性发育略快, 雌雄异体, 二者性比接近 1∶1。本研究为偏顶蛤的 天然资源保护及大规模人工增养殖的开展提供了基础资料。

    Abstract:

    The wild Modiolus modiolus resource has experienced a dramatic decline in abundance over the past few decades because of overfishing, declining seawater quality, and a lack of proper protection. The reproductive cycle and gonadal development of M. modiolus from the coast of Heishijiao, Dalian city were investigated from October 2013 to September 2014 to develop management strategies and optimize hatchery-based seed production. Specimens were col- lected monthly, and seawater column temperatures were recorded simultaneously. Shell size, total weight, tissue weight, and gonad weight of M. modiolus were measured to calculate fatness and the gonadosomatic index, and histological techniques were used to analyze the seasonal gonadal cycle. The histological analysis showed a unimodal gametogenic cycle with one spawning season (August–October) annually. Although shellfish gonadal development stages have no unified standard, M. modiolus gonadal development was divided into five stages according to previous studies: the pro- liferating stage, growing stage, maturing stage, spawning stage, and resting stage. Oogenesis was divided into the oogo- nial stage, early growth stage, middle growth stage, late growth stage, and mature stage, according to the oocyte devel- opmental characteristics and the proportions of different oocyte developmental stages in the follicle. Spermatogenesis of M. modiolus included five stages of spermatogonium, primary spermatocyte, secondary spermatocyte, spermatid, and spermatozoon. Spermatogonia were morphologically divided into types A and B. Type A spermatogonia distributed in all developmental stages, and their nuclear chromatin was arranged loosely. Type B spermatogonia occurred during the proliferating stage, and the nuclear chromatin was concentrated. Thus, types A and B spermatogonia were considered differentiated cells and stem cells, respectively. The peak gonadosomatic index of 32.25% and fatness of 38.43% were observed in January, and the maximum values for both occurred in August. The breeding season was from June to No- vember, when the average seawater temperature was 16.8–22.1℃. M. modiolus gonads matured by the end of May, but they did not spawn until August of the rainy season, indicating that the mature gonads of the parental shellfish only pro- vided a material basis for reproduction and that the reproductive process requires particular conditions for induction, such as temperature and salinity. The developmental rate of the male gonad was slightly faster than that of the female. Gonochorism existed, and the female to male ratio was 1︰1. These results provide basic information about M. modio- lus reproduction to help with natural resources protection, and will aid in developing a large-scale artificial breeding program.

    参考文献
    相似文献
    引证文献
引用本文

宁军号,常亚青,宋坚,胡盼,经晨晨.偏顶蛤的性腺发育和生殖周期[J].中国水产科学,2015,22(3):469-477
NING Junhao, CHANG Yaqing, SONG Jian, HU Pan, JING Chenchen. Gonadal development and the reproductive cycle of Modiolus modiolus[J]. Journal of Fishery Sciences of China,2015,22(3):469-477

复制
相关视频

分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2015-05-13
  • 出版日期:
文章二维码