Jellyfish as an alternative source of food for opportunistic fishes

Type Article
Date 2016-12
Language English
Author(s) Marques Raquel1, 2, Bouvier Corinne1, Darnaude Audrey M.1, Molinero Juan-Carlos3, Przybyla CyrilleORCID4, Soriano Solenn5, Tomasini Jean-Antoine1, Bonnet Delphine1
Affiliation(s) 1 : Univ Montpellier, Lab MARBEC, CC093,Pl Eugene Bataillon, F-34095 Montpellier 05, France.
2 : Univ Algarve, Fac Ciencias & Tecnol, Campus Gambelas, P-8005139 Faro, Portugal.
3 : GEOMAR Helmholtz Ctr Ocean Res Kiel, Marine Ecol Food Webs, Duesternbrooker Weg 20, D-24105 Kiel, Germany.
4 : Univ Montpellier, IRD, IFREMER, UMR MARBEC,CNRS, Chemin Maguelone, F-34250 Palavas Les Flots, France.
5 : Univ Montpellier, Stn Mediterraneenne Environm Littoral, 2 Rue Chantiers, F-34200 Sete, France.
Source Journal Of Experimental Marine Biology And Ecology (0022-0981) (Elsevier Science Bv), 2016-12 , Vol. 485 , P. 1-7
DOI 10.1016/j.jembe.2016.08.008
WOS© Times Cited 11
Keyword(s) Aurelia sp., Predation, Fish, Sparus aurata, Ingestion rate, Energy pathways
Abstract Although scientific interest on jellyfish ecology has substantially increased in the last decades, little is known on the role of potential predators shaping their population dynamics. Jellyfish were long considered as ‘dead ends’ within food webs, and therefore overlooked as potential food source for higher trophic levels, e.g. fishes. Here this question is tackled by using comprehensive laboratory experiments assessing fish predation on jellyfish. The approach included all the life stages (polyps, ephyrae and medusa) of Aurelia sp. versus more traditional aquaculture feeds in an easily farmed opportunistic fish, the gilthead seabream Sparus aurata (L.). Results revealed that all life stages of Aurelia sp. were accepted as a source of food by S. aurata, whose grazing pressure varies depending on the jellyfish life stage. Higher ingestion rates were observed on young stages (i.e. small medusa) indicating their higher vulnerability to fish predation and the potential negative impact this may have on Aurelia sp. population dynamics. These results provide new insights on the so far underestimated role fish predation can have on jellyfish population dynamics. In particular, opportunistic fish species, such as S. aurata may contribute to control jellyfish blooms, through top-down regulations of jellyfish biomass.
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Marques Raquel, Bouvier Corinne, Darnaude Audrey M., Molinero Juan-Carlos, Przybyla Cyrille, Soriano Solenn, Tomasini Jean-Antoine, Bonnet Delphine (2016). Jellyfish as an alternative source of food for opportunistic fishes. Journal Of Experimental Marine Biology And Ecology, 485, 1-7. Publisher's official version : https://doi.org/10.1016/j.jembe.2016.08.008 , Open Access version : https://archimer.ifremer.fr/doc/00349/46018/