The new invader Beroe ovata Mayer 1912 and its effect on the ecosystem in the northeastern Black Sea

被引：0

作者：

Tamara A. Shiganova

Yulia V. Bulgakova

Stanislav P. Volovik

Zinaida A. Mirzoyan

Sergey I. Dudkin

机构：

[1] Russian Academy of Sciences,P. P. Shirshov Institute of Oceanology

[2] Russian Academy of Sciences,P. P. Shirshov Institute of Oceanology

[3] Institute of the Azov Sea Fishery Problems,State Unitary Enterprise Research

来源：

Hydrobiologia | 2001年 / 451卷

关键词：

Azov Sea; feeding; respiration; ichthyoplankton; zooplankton;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The abundance, biomass and distribution of the ctenophore, Beroe ovata Mayer 1912 were assessed along with several parameters associated with composition, respiration and feeding. Digestion time of B. ovata feeding on other ctenophores ranged from 4–5.5 h for Mnemiopsis leidyi A. Agassiz to 7–8 h for Pleurobrachia pileus (O. F. Müller). Daily ration was estimated as 20–80% of wet weight based on field observations of feeding frequency coupled with digestion time. Calculations indicate that the measured population of B. ovata ingested up to 10% of the M. leidyi population daily. A marked decrease in M. leidyi density was recorded. The abundance of zooplankton increased about 5-fold and ichthyoplankton about 20-fold compared with the same season in previous years following the M. leidyi invasion.

引用

页码：187 / 197

页数：10

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