In-situ Observations of Symbionts on Medusae Occurring in Japan, Thailand, Indonesia and Malaysia <Article>

Ohtsuka Susumu

Kondo Yusuke

Sakai Yoichi

Shimazu Takeshi

Shimomura Michitaka

Komai Tomoyuki

Yanagi Keisuke

Fujita Toshihiko

Nishikawa Jun

Miyake Hiroshi

B. A. Venmathi Maran

Go Akio

Nagaguchi Kazumitsu

Yamaguchi Shuhei

Dechsakulwatana Chutiwan

Srinui Khwanruan

Putchakarn Sumaitt

Mulyadi

Mujiono Nova

Sutomo

Yusoff Fatimah Md.

広島大学総合博物館研究報告

Bulletin of the Hiroshima University Museum

[PISSN] 1884-4243

[EISSN] 1884-3999

[NCID] AA12459864

During an ecological investigation on symbionts of medusae in Eastern and Southeastern Asian waters, seven species of hydro- and scypho-medusae were found to harbor a wide variety of invertebrates and fishes: the isopod Idotea metallica and the nudibranch Fiona pinnata on the chondrophoran Vellela vellela; the actiniarian Peachia quinquecapitata on the leptomedusa Aequorea coerulescens; the butterfish Psenopsis anomala and the hyperiid amphipod Hyperia galba associated with the semaestome Chrysaora melanaster; H. galba on the semaestome Aurelia limbata; metacercariae of three species found in the mesogloea of a semaestome, Aurelia sp.; the ophiuroid Ophiocnemis marmorata, the caridean shrimp Latreutes spp., and the shrimp scad Alepes djedaba on the rhizostome Rhopilema hispidum; the swimming crab Charybdis feriata and A. djedaba on the rhizostome Versuriga anadyomene. Juveniles of benthic organisms such as crabs and ophiuroids seem to become hitchhikers for dispersal, while juvenile fish utilize medusae as refugia against predation. Since the previous and present studies have shown that edible rhizostomes are associated with many kinds of symbionts, fisheries for these jellyfishes possibly hinder the recruitment of symbionts such as decapods, ophiuroids and fish.

Anti-Predation

Dispersal

Host

Medusa

Rhizostome

Symbiont

Zoology [ 480 ]

eng

広島大学総合博物館

Copyright (c) 2010 広島大学総合博物館 Hiroshima University Museum

[ISSN] 1884-4243

[NCID] AA12459864