The Levantine jellyfish Rhopilema nomadica and Rhizostoma pulmo swim faster against the flow than with the flow
| Autor: | Tamar Lotan, Dror Malul, Yizhaq Makovsky, Uri Shavit, Roi Holzman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
0209 industrial biotechnology Jellyfish Scyphozoa Flow (psychology) lcsh:Medicine 02 engineering and technology Rhopilema nomadica Biology Rhizostoma pulmo Article 03 medical and health sciences 020901 industrial engineering & automation Fluid dynamics biology.animal Animals lcsh:Science Swimming Multidisciplinary lcsh:R Motility Water velocity Models Theoretical biology.organism_classification Flume Eastern mediterranean 030104 developmental biology Oceanography Hydrodynamics Seawater lcsh:Q Algorithms |
| Zdroj: | Scientific Reports, Vol 9, Iss 1, Pp 1-6 (2019) Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-019-56311-3 |
| Popis: | Jellyfish locomotion and orientation have been studied in the past both in the laboratory, testing mostly small jellyfish, and in the field, where it was impossible to control the seawater currents. Utilizing an outdoor water flume, we tested the locomotion of jellyfish when swimming against and with currents of up to 4.5 cm s−1. We used adult jellyfish from two of the most abundant species in the eastern Mediterranean, Rhopilema nomadica and Rhizostoma pulmo, and measured their pulsation frequency and swimming speed relative to the water. While pulsation frequency was not affected by the water velocity, jellyfish swam faster against the current than with it. This finding suggests that jellyfish possess a sensory ability, whose mechanism is currently unknown, enabling them to gauge the flow and react to it, possibly in order to reduce the risk of stranding. |
| Databáze: | OpenAIRE |
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