Data/hora: 01/06/2024 06:13:37

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Prey preferences of adult sea bass Dicentrarchus labrax in the northeastern Atlantic: implications for bycatch of common dolphin Delphinus delphis
Autores: | Spitz, Jerome; Chouvelon, Tiphaine; Cardinaud, M.; Kostecki,; Lorance, Pascal.
Data: | 2013-03
Ano: | 2013
Palavras-chave: | Chesson's index; Marine top predator; Prey selection; SIAR; Stable isotope; Stomach content.
Resumo: | In the northeastern Atlantic, adult sea bass (Dicentrarchus labrax) is one of largest fish living on the shelf, and this species has important commercial value. However, pelagic trawl fisheries that target sea bass have negative operational interactions with common dolphins (Delphinus delphis). Our goal was to determine the diet of adult sea bass in the Bay of Biscay from stomachcontent and stable-isotope analyses, and explore the dietary overlap between sea bass and common dolphins. We found that sea bass primarily target small pelagic fish, most notably mackerel (Scomber scombrus), scads (Trachurus spp.), anchovy (Engraulis encrasicolus), and sardine (Sardina pilchardus). These four species also dominated the diets of common dolphins. This overlap in feeding preferences could increase the risk of dolphins being caught by trawl fisheries while feeding among sea bass, and may be an underlying mechanism to explain the high rate of common dolphin bycatch observed in the pelagic trawl fishery for sea bass in the Bay of Biscay. Understanding the foraging ecology and trophic interactions of predator species is an essential step for identifying and resolving management issues in the northeastern Atlantic and other marine ecosystems.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00125/23625/21485.pdf

DOI:10.1093/icesjms/fss200

Editor: | Oxford Univ Press
Relação: | http://archimer.ifremer.fr/doc/00125/23625/
Formato: | application/pdf
Fonte: | Ices Journal Of Marine Science (1054-3139) (Oxford Univ Press), 2013-03 , Vol. 70 , N. 2 , P. 452-461
Fonte: | 2013 International Council for the Exploration of the Sea. Published by Oxford University Press. All rights reserved.