长期低温条件对海蜇横裂生殖的影响

Long-term Low Temperature Effect on Jellyfish Strobilation

采用实验生态学手段,研究了长期低温条件对海蜇螅状体保育存活率和横裂生殖效率的影响。结果表明:海蜇横裂生殖后的螅状体经过1a的长期低温保育后,其存活率约33%,显著高于不采用低温条件保育螅状体的成活率。横裂生殖后的螅状体经长期低温保育后仍具有横裂生殖能力,碟状幼体释放率仍然高达15%,其横裂生殖能力可与正常螅状幼体相比。采用长期低温环境条件,可以有效地提高海蜇螅状体的存活率,并可以恢复促进海蜇的横裂生殖效率,相关结果可以为海蜇苗种生产提供参考和指导。

By means of methods in experimental ecology,the survival rate of jellyfish scyphistomae bred under long-term low temperature conditions,and the effects of these conditions on the jellyfish strobilation are studied.It is shown in the study results that after scyphistomae reproduced from jellyfish strobilation has been bred under one-year long low temperature conditions,its survival rate is about 33%,significantly higher than that of scyphistomae without low temperature breeding conditions.Although those survivors have been bred under low temperature conditions for a long time,they still have their strobilation ability,and the ephyrae release rate is as high as 15%.Those ephyrae lavae will have their strobilation ability comparable with the ability of scyphistomae lavae bred under normal conditions.Therefore the long-term low temperature conditions are favourable to effectively raise the survival rate of jellyfish scyphistomae larvae and to improve jellyfish strobilation efficiency.These relevand results might be used as reference and guidance for jellyfish lava production.