中国水产科学2017，Vol.24Issue(3)：488-496,9.DOI:10.3724/SP.J.1118.2017.16280
钝缀锦蛤繁殖周期和胚胎发育
The reproductive cycle and embryonic development of the bivalve molluskTapes conspersus
摘要
Abstract
The marine bivalve molluskTapes conspersus is mainly distributed in tropical and subtropical waters of the southwestern Pacific Ocean, including coastal areas of China, Japan, Philippines, India, Indonesia, Australia and New Zealand. The species is relatively new to shellfish mariculture, having potentially high economic value and good prospects for development. This study used biological productivity methods to investigate the species' reproductive cycle, gonad development, fatness, breeding season, embryo development and larval development in the period from August 2013 to July 2014. In the examination of its breeding cycle, the gonadogenesis ofT. conspersus presented a unimodal gametogenic cycle, with one spawning season annually. The gonad development of the species could be divided into five stages: proliferating stage, growing stage, maturing stage, spawning stage and resting stage. This shellfish's mode of reproduction is oviparity, with a slightly greater gonad development among males than female. The species displays gonochorism, with a female to male ratio of 1:1. The spawning season was recorded as from October to March. Peaks in spawning occurred in March, October and November, at water temperatures of 20.3?24.6℃. Fatness peaked at 33.43% in August, and the lowest measure of fatness was in April at ~18.31%. The cultivation of embryos and larvae revealed demersal, elliptically shaped eggs, and the egg diameter ranged from 70 to 80μm. Under the conditions of water temperatures of 24?26℃ and salinities of 28?32, the fertilized eggs developed into D-shaped larvae, 90?110μm in length, within 16 hours of hatching. After 7?8 days, the D-shaped larvae then developed into late-umbo larvae, 210?230μm in length. Thereafter, the late-umbo larvae developed into juvenile mollusks within 4?5 days. These observations provide a foundation for the artificial breeding and protection of genetic resources ofT. conspersus.关键词
钝缀锦蛤/繁殖周期/性腺发育/肥满度/胚胎发育Key words
Tapes conspersus/reproductive cycle/gonad development/fatness/embryo development分类
农业科技引用本文复制引用
巫旗生,文宇,曾志南,王晓清,宁岳,祁剑飞,罗娟,贾圆圆..钝缀锦蛤繁殖周期和胚胎发育[J].中国水产科学,2017,24(3):488-496,9.基金项目
现代农业产业技术体系建设专项(nycytx-47) （nycytx-47）
福建省种业创新与产业化工程项目(2014s1477-9) （2014s1477-9）
福建省属公益类科研院所基本科研专项(2015R1003-13) （2015R1003-13）
福建省海洋生物增养殖与高值化利用重点实验室项目(2015fjscq03). （2015fjscq03）
