管角螺的繁殖生物学  

Reproductive biology of Hemifusus tuba (Gmelin)

作　　者：潘英[1] 庞有萍 罗福广[1] 陈锋华[1] 王强哲 

机构地区：[1]广西大学动物科学技术学院,广西南宁530004 [2]北海市水产技术推广站,广西北海536000

出　　处：《水产学报》2008年第2期217-222,共6页Journal of Fisheries of China

基　　金：广西科学研究与技术开发计划项目(桂科攻0537010-1C);广西科学基金项目(桂科青0640007)

摘　　要：研究了管角螺（Hemifusus tuba Gmelin）繁殖方式、繁殖季节、繁殖力、孵化及稚、幼螺发育过程。研究结果表明，管角螺在广西沿海每年只有一个繁殖期（4—5月，水温24～28℃）。管角螺的整个胚胎发育阶段都在卵囊内进行，属直接发生型，出膜后即为稚螺，其繁育过程没有自由生活的浮游幼虫阶段。繁殖期内亲螺有多次交尾现象，平均每个雌螺产卵2．1次，产卵囊20．4个，每个卵囊平均含有卵子2115粒，个体繁殖力4．3万粒。水温24～29℃时稚螺孵出时间为29～30d，孵化率98％。90d后发育为5．0cm的幼螺。Hemifusus tuba （Gmelin） is a commercially valued species that naturally lives in the South China Sea. In order to study the reproductive biology of H. tuba, 216 mature individuals captured from the North Bay were measured. The reproductive habit, season and reproductive capacity, hatching development and development course of naiad and young H. tuba were determined, and the whole process embryonic development was observed and photographs were taken continuously. Based on the annual change of cultural experiments, it was concluded that the reproductive season of H. tuba was from April to May （24 - 28℃） every year in inshore Guangxi. The course of embryonic development occurred completely in egg capsule of H. tuba. It belongs to the direct developmental type. After hatching, it directly become naiad H. tuba and had no free life stage of larva. The parents mate many times in a reproductive period. The female spawns 2.1 times and lays 20.4 egg capsules in the average every reproductive period. The individual reproductive capacity is 43 thousands on the average. There are average 2 115 zygotes in an egg capsule, and the diameter of eggs was 240- 320 μm, and only 10- 30 could develop into naiads among them. Under 24 - 29 ℃, the naiad hatched after 29- 30 days. Hatching rate is 98 %. The juvenile developed into naiad and grew into 5.0 cm young H. tuba after 90 days. The reproductive habit, season and reproductive capacity, hatching development and development course of naiad and young were first reported in H. tuba. These results would provide the important scientific basis for the large-scale artificial reproduction and the resources protection of H. tuba. And the optimal season of artificial reproduction is from April to May.

关 键 词：管角螺 受精卵 繁殖生物学 胚胎发育 

分 类 号：S917[农业科学—水产科学]