LIFE-HISTORY STRATEGY OF AURELIA-AURITA (CNIDARIA, SCYPHOMEDUSAE) AND ITS IMPACT ON THE ZOOPLANKTON COMMUNITY OF TOKYO-BAY

被引：92

作者：

OMORI, M ^{[1
]}

ISHII, H ^{[1
]}

FUJINAGA, A ^{[1
]}

机构：

[1] CENT RES INST ELECT POWER IND,ABIKO LAB,ABIKO,CHIBA 27011,JAPAN

来源：

ICES JOURNAL OF MARINE SCIENCE | 1995年 / 52卷 / 3-4期

关键词：

AURELIA; JELLYFISH; LIFE HISTORY; PREDATION; TOKYO BAY;

D O I：

10.1016/1054-3139(95)80074-3

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

The life history of the common jellyfish Aurelia aurita in 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 degrees 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 summer A. aurita may lead to a sharp decrease in Acartia omorii density, but does not markedly affect the smaller copepod Oithona davisae, which remains abundant throughout the year. (C) 1995 International Council for the Exploration of the Sea

引用

页码：597 / 603

页数：7

共 22 条

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