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The Occurrence of Ophiocnemis marmorata (Echinodermata:Ophiuroidea) Associated with the Rhizostome Medusa Rhopilema hispidum (Cnidaria:Scyphozoa)

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Journal of Ocean University of China 2008年第4期7卷 421-424页

作者： govindan kanagaraj Pithchai Sampath Kumar André C. Morandini Center of Advanced Study in Marine Biology Annamalai University Nucleus of Ecology and Social-Environmental Development of Macaé (NUPEM/UFRJ) Federal University of Rio de Janeiro (UFRJ)C. P. 119331Macaé27910-970RJBrazil

The association of scyphomedusae with invertebrates has been long known in the literature; especially with hyperiids amphipods. The association of echinoderms with jellyfish is not common and rarely recorded. We reported the association of the ophiuroid Ophiocnemis marmorata with the rhizostome scyphomedusa Rhopilema hispidum collected in Vellar estuary (on the southeast coast of India). O. marmorata is supposed to be a filter feeding ophiuroid,quite common in soft bottom of shallow waters. The brittle stars possibly seek for food supply,shelter and protection through the association.

关键词：水母印度棘皮类蛇尾纳

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Field and Laboratory Observations on Predation and Prey Selectivity of the Scyphomedusa Chrysaora *** in Southeast Indian Waters

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Journal of Ocean University of China 2011年第1期10卷 47-54页

作者： govindan kanagaraj Pazhaniyappan Ezhilarasan Pitchai Sampathkumar André C.Morandini Velayudhan pillai Sivakumar Southeastern Institute of Marine Biology Thomas Nagar Department of Zoology V.O.Chidambaram College Centre of Advanced Study in Marine Biology Departamento de Zoologia Instituto de BiociênciasUniversidade de So Paulo

Chrysaora ***,one of the most abundant medusae species in India,seems to be an important predator in the coastal waters of Bay of *** ability of Chrysaora *** to feed at maximum rate in high prey concentrations implies that this jellyfish can efficiently exploit dense prey patches,at least for a short *** study presents preliminary information regarding digestion and feeding rate upon copepods in a warm water *** ingestion rate of the average-sized medusae Chrysaora *** is well balanced in nature,which in turn implies that this jellyfish is tuned for optimal utilization of available prey *** with earlier research indicates that prey escape speed is one important factor governing which prey will be captured.A full understanding of predation mechanics awaits further investigation of both predator and prey ***,because of the scarcity of long-term quantitative population data most insights have to be made ***,low abun-dance of Chrysaora *** in the water column during summer (May 2007) and the overall annual abundance seem not to con-siderably affect the zooplankton population,especially *** present work contributes to the knowledge of prey-predator relationship of the forgotten fauna in Indian waters,which is especially crucial for understanding the process of ecological recovery of coastal water environment.

关键词：被捕食印度河比照实验室东南亚动物种群沿岸海域环境生态

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