文章摘要
王丹丽,赖伟.拟老年低额溞的生长与生殖[J].水产学报,1990,14(4):304~312
拟老年低额溞的生长与生殖
ON GROWTH AND PRODUCTION OF SIMOCEPHALUS VETULOIDES SARS
投稿时间:1989-10-01  修订日期:1990-02-01
DOI:
中文关键词: 拟老年低额溞  生长  生殖
英文关键词: Simocephatus vetuloides  growth  production
基金项目:
作者单位
王丹丽 浙江水产学院 舟山 
赖伟 华东师范大学 舟山 上海 
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中文摘要:
      在 12-23℃、20℃和30℃三种温度下,观察了拟老年低额溞(Simocephalusvetuloides Sars)的生长与生殖。其生长随龄数的增加而变慢,寿命因温度升高而缩短。在12—23℃时,寿命为45.80±20.54天,各成龄的果汁产仔数为205.12个,产仔率(a 值)为11.96;20℃时,寿命为50.20.9.86天,累计产仔数为205.21个,产仔率为10.22;30℃时,上述各项均小于前二者。根据实验结果,拟老年低额溞的适温范围为 15—20℃。 于20℃温度下,将该溞分二组培养,其中一组每5天更新20%培养液。更添食物,能延长寿命,提高产仔量,增加产仔次数,缩短产仔间隔天数。
英文摘要:
      The growth and reproduction of the Simocephalus vetuloides Sars at 12-23℃, 20℃ and 30℃ has been studied in the laboratory. The growth rate varies with the number of instars. Most of growth curves show an initial high rate in the juveniles, an intermediate rate in the young adults and a low rate in the older adults. The total life span on a decrescent basis varies with the increasing of temperature.This species produces about 205. 12 yaungs in 45.80± 20.54 days of its life span at 12--23℃, 205-21 youngs in 50.20±9.86 days of its life span at 20℃ and 97.79 yaungs in 29.20±2.15 days of its life span at 30℃. This species has a higher rate of young production (a=11.96,10.22) at 12-23℃ and 20℃ than at 30℃ (a=8.21). The results of these experiments show a appropriate temperature in 15-20℃.The culture of S'.vetuloides are divided into 2 groups at 20℃. one is in original medium, and the another is in new medium by changing every 5 days. Rich food can promote it's life Span. The sum of young and the sum of broods are increased,and interval of praduations are shortened.
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