Associations between fish and jellyfish in the NW Mediterranean
| Autor: | Ana Sabatés, Vanesa Raya, Uxue Tilves, Veronica Fuentes, Mercedes Blázquez |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España) |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Mediterranean climate Jellyfish Ecology biology Caranx rhonchus 010604 marine biology & hydrobiology Cotylorhiza tuberculata Zoology Juvenile fish Aquatic Science Trachurus mediterraneus biology.organism_classification Rhizostoma pulmo 010603 evolutionary biology 01 natural sciences biology.animal Trachurus trachurus Ecology Evolution Behavior and Systematics |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 14 pages, 7 figures, 4 tables Fish–jellyfish associations were studied close to Barcelona (NW Mediterranean) during the summer period from 2008 to 2014. Jellyfish and their associate juvenile fish were collected, identified, counted, and measured. Fish behaviour was described by visual field observations and laboratory experiments were performed to determine the survival of the associated fish after being in contact with the jellyfish. In addition, the possible contribution of jellyfish to the dietary composition of the fish was assessed using a combination of biomarkers. Trachurus mediterraneus, Trachurus trachurus, and Caranx rhonchus were associated with the jellyfish Rhizostoma pulmo and Cotylorhiza tuberculata. Trachurus mediterraneus was the most frequent species and their size during the association ranged between 8.4 and 66 mm standard length. The size and number of T. mediterraneus were slightly correlated with the size of R. pulmo, but not with that of C. tuberculata, although more numerous fish were found swimming with C. tuberculata. Behaviour studies showed that juvenile fish swam around jellyfish and into their oral arms seeking shelter without suffering any pain. This survival capability was corroborated by experimental work in which all the specimens of T. mediterraneus survived after being in contact with both jellyfish species. Stable isotopes and fatty acids also revealed an important contribution of R. pulmo and C. tuberculata to T. mediterraneus diet. Defining better the associations between jellyfish and juvenile fish will help to understand the effects of the association on the survival and recruitment of fish species potentially ecologically and economically relevant This work was supported by the projects CTM2010-18874 and CTM2015-68543-R (Spanish Ministry of Economy and Competitiveness). UT was supported by a predoctoral fellowship of the FPI program (Spanish Ministry of Economy and Competitiveness) |
| Databáze: | OpenAIRE |
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