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Swimming and feeding in Periphylla periphylla (Scyphozoa, Coronatae)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Umeå University, Faculty of Science and Technology, Umeå Marine Sciences Centre (UMF). (UMFpub)
2008 (English)In: Marine Biology, Vol. 153, no 4, 653-659 p.Article in journal (Refereed) Published
Abstract [en]

Some western Norwegian fjords host extraordinarily abundant and persistent populations of the mesopelagic, coronate scyphomedusa, Periphylla periphylla. In these environments, from late autumn to spring, the medusae undertake regular diel vertical migrations into surface waters. From unique observations obtained with a remotely operated vehicle (ROV), including observations made without artificial light, we observed that 90% of the medusae swam with their tentacles in aboral position. Stomach content analyses of surface-collected specimens revealed that the medusae ate mainly calanoid copepods, but ostracods and large euphausiids were also prominent components of their diets. The clearance rate potential of P. periphylla, assessed from in situ observations and stomach contents, was comparable to that of similar-sized, epipelagic gelatinous species. Our findings suggest that P. periphylla behave as active predators in surface waters.

Place, publisher, year, edition, pages
2008. Vol. 153, no 4, 653-659 p.
Identifiers
URN: urn:nbn:se:umu:diva-11358DOI: 10.1007/s00227-007-0839-1OAI: oai:DiVA.org:umu-11358DiVA: diva2:151029
Available from: 2008-12-16 Created: 2008-12-16 Last updated: 2017-10-24Bibliographically approved

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Båmstedt, Ulf
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