Life history strategy of Aurelia aurita (Cnidaria, Scyphomedusae) and its impact on the zooplankton community of Tokyo Bay
Life history strategy of Aurelia aurita (Cnidaria, Scyphomedusae) and its impact on the zooplankton community of Tokyo Bay
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DOI：
10.1016/1054-3139(95)80074-3
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发表时间：
1995-06
影响因子：
3.3
通讯作者：
M. Omori;H. Ishii;Ai Fujinaga
中科院分区：
文献类型：
--
作者：
M. Omori;H. Ishii;Ai Fujinaga
从1990年5月至1992年12月，对东京湾普通黄鳍金枪鱼的生活史进行了为期32个月的调查。3厘米直径的年轻水母发生从四月。增长迅速。这一群体的一些标本达到25厘米，并在7月/8月产卵，然后尺寸减小或死亡。其他的则在10月产卵时达到最大尺寸，超过20厘米。相当数量的成熟个体在第二年产卵后仍然存在，并且尺寸减小。环境温度降低到15°C以下似乎会引起Ephyridine的释放，释放高峰出现在12月/2月。温度的下降可能是海湾中横裂的暗示。对捕食率的初步分析表明，在夏季A. auritamae可能会导致锐蜱的数量急剧下降，但不会明显影响较小的桡足类Oithona davisae，这仍然是全年丰富。
The life history of the common jellyfishAurelia auritain Tokyo Bay was investigated by monthly sampling over a 32-month period from May 1990 to December 1992. Young medusae of 3 cm diameter occur from April. Growth was rapid. Some specimens of this cohort reach 25 cm and spawn by July/August and then decrease in size or die. Others reach a maximal size of > 20 cm by October, when spawning takes place. A considerable number of mature individuals remain after spawning the next year and decrease in size. Release of ephyrae seems to be induced by a lowering of environmental temperature to below 15°C, with peak release occurring in December/February. A drop in temperature may be the cue for strobilation in the bay. Preliminary analysis of predation rate indicates that in summerA. auritamay lead to a sharp decrease inAcartia omoriidensity, but does not markedly affect the smaller copepodOithona davisae, which remains abundant throughout the year.