摘要
研究了泥螺的繁殖方式、繁殖季节、繁殖力、受精卵的孵化、幼虫发育及变态和稚、幼螺的发育过程。泥螺在浙江沿海每年的繁殖期为3-11月,5-6月和9-10月为繁殖高峰繁殖期内亲螺有一次交配多次产卵现象,平均每个亲螺产卵3-4次,每次产卵群1个,每个卵群平均含有受精卵 6282个,个体繁殖力18 848.4-25128.0粒。在水温28.5℃条件下,面盘幼虫孵化时间为72h,孵化率为93.8％。幼虫经过2-8d浮游生活后进入匍匐生活,28-30d后发育变态成为稚螺,50d后成为幼螺。
The reproductive habit, reproductive season, reproductive capacity, hatch, development and metamorphosis of larvae, and development course of naiad young Bul-Lacta exarata were studied in this paper. Its reproductive period is from March to November every year on inshore of Zhejiang Province. The parents mate one time and spawn many times in a reproductive period, averagely spawning 3-4 times and laying an egg group with 6 282 zygotes on average. The individual reproductive capacity is 18 848. 4- 25 128. 0 on average. Under 28. 5℃ , the veliger larvae are hatched after 72h, with a hatch rate of 93. 8%. The larvae develope into groveling period after 2-8 days, into naiads after 28-30 days, and grow into young snails after 50 days.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2003年第1期30-35,T002,共7页
Journal of Tropical Oceanography
