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Article

Respiration Rates, Metabolic Demands and Feeding of Ephyrae and Young Medusae of the Rhizostome Rhopilema nomadica

1
Department of Maritime Civilizations, Charney School of Marine Sciences & Recanati Institute for Maritime Studies, University of Haifa, Mt. Carmel, Haifa 31905, Israel
2
Steinhardt Museum of Natural History, Tel Aviv University, Tel Aviv 69978, Israel
*
Author to whom correspondence should be addressed.
Academic Editors: Alenka Malej and Agustín Schiariti
Diversity 2021, 13(7), 320; https://doi.org/10.3390/d13070320
Received: 9 June 2021 / Revised: 12 July 2021 / Accepted: 13 July 2021 / Published: 14 July 2021
(This article belongs to the Special Issue Patterns and Ecology of Jellyfish in Marine Environment)
Jellyfish (cnidarians and ctenophores) affect the marine food web through high feeding rates and feeding efficiency, but in contrast to their great importance in the ecosystem, our knowledge of their dietary requirements is limited. Here we present the results of respiratory and feeding trials of the rhizostome Rhopilema nomadica, the dominant scyphozoan in the waters of the Eastern Mediterranean, which often establishes massive swarms, mainly in the summer months. Through multiple measurements of oxygen demand in R. nomadica at bell diameters of 3–49 mm, we were able to assess its minimum energetic requirements. These, and the results of the feeding trials on individuals of the same bell diameter range, show that R. nomadica is a very efficient predator. When presented with prey concentrations of 100 prey items per liter, a single hourly feeding session provided between 1.15 and 3 times the estimated daily basal carbon requirement. Our findings suggest that R. nomadica is well adapted to its environment, the hyperoligotrophic waters of the eastern Mediterranean, able to efficiently exploit patches of plankton, possibly at rates even higher than what we observed under laboratory conditions. View Full-Text
Keywords: scyphomedusa; Eastern Mediterranean; minimum energetic demand; predation potential; feeding specialization scyphomedusa; Eastern Mediterranean; minimum energetic demand; predation potential; feeding specialization
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MDPI and ACS Style

Kuplik, Z.; Kerem, D.; Angel, D.L. Respiration Rates, Metabolic Demands and Feeding of Ephyrae and Young Medusae of the Rhizostome Rhopilema nomadica. Diversity 2021, 13, 320. https://doi.org/10.3390/d13070320

AMA Style

Kuplik Z, Kerem D, Angel DL. Respiration Rates, Metabolic Demands and Feeding of Ephyrae and Young Medusae of the Rhizostome Rhopilema nomadica. Diversity. 2021; 13(7):320. https://doi.org/10.3390/d13070320

Chicago/Turabian Style

Kuplik, Zafrir, Dani Kerem, and Dror L. Angel 2021. "Respiration Rates, Metabolic Demands and Feeding of Ephyrae and Young Medusae of the Rhizostome Rhopilema nomadica" Diversity 13, no. 7: 320. https://doi.org/10.3390/d13070320

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