摘要
用4L:20D、8L:16D、12L:12D和24L:0D四种光周期条件培养罗氏沼虾状幼体,观察其存活率和生长、发育情况.研究结果表明,随着光照时间的延长,特别是在连续照明的条件下,与最短的光照条件相比,幼体的存活率及体长生长率分别提高15.7%和2.2%/d,而育成P1(仔虾)的时间却相应缩短了10d.
The experiments were carried out on the iceal larvae of Macrobrachium rosenbergii(De Man) to exadrine the effect of photoperiod on survival and growth in body length.The larvae were reared from first iceal stage to postlarval stage under 4L:20D,8L:16D, 12L : 12D and 24L:0D photoperiods, separately.There were significant differences in survival and growth rate. Reared in long-day especially under continuous illumination, rates of survival and growth of larvae were 15.7% and 2.2%/d higher respectively. Metamorphosis was 10 d faster than that in short -day.
出处
《暨南大学学报(自然科学与医学版)》
CAS
CSCD
1996年第1期69-73,共5页
Journal of Jinan University(Natural Science & Medicine Edition)
基金
国务院侨办重点学科科研基金
关键词
罗氏沼虾
幼体
光周期
存活率
生长率
Macrobrachium rosenbergii larvae, photoperiod, survival, growth rate