海月水母(Aurelia sp.1)水螅体在空气中暴露存活研究

VIABILITY OF SCYPHISTOMAE OF AURELIA sp.1 EXPOSED IN THE AIR

在实验室内研究了海月水母水螅体交替淹没在海水、暴露在空气中的存活情况,分析了其在潮间带存活的可能性。结果表明,整个实验过程中,暴露15min组,海月水母水螅体存活率均为100%。暴露30min组,25h后,水螅体存活率为82.22%。暴露45min组,2.75h时,存活率显著降低为73.33%;25h后,存活率下降为46.67%。暴露1h组,在3h时,水螅体存活率显著降低为46.67%;25h时存活率为26.67%。暴露2h组,4h时,水螅体存活率显著降低为2.38%;8h后水螅体全部死亡。整个实验过程中,海月水母水螅体暴露在空气中半数死亡的时间约57min,根据实验结果,初步推测海月水母水螅体可能在低潮带生存,而在高、中潮带不可能存活。

In the laboratory, the viability of scyphistomae ofAurelia sp. 1 being exposed in air and in the seawater by turn are studied. The possibility of living in the intertidal zone was also analyzed. At the exposed 15min group, the viabil- ity rates of the scyphistomae are 100% in the experiment. At the exposed 30min group, its viability rate is 82.22% after twenty-fifth hour. At the exposed 45rain group, the scyphistomae＇s viability rate dramatically falls to 46.67% after twenty-fifth hour. At the exposed 1 hour group, the viability of the scyphistomae drop significantly to 46.67% after the third hour, then they fall to 26.67% after the twenty-fifth hour. At the exposed 2 hour group, the viability of the scyphistomae reduce significantly to 2.38% after 4h, then all the scyphistomae died is about 57 minute. According to the results, relia sp. 1 may survive in lower intertidal zone. scyphistomae are dead after 8h. The time when half of the it is preliminarily presumed that the scyphistomae of Aurelia sp. 1 may survive in lower intertidal zone.