Miniatura

Fitxers

703544.pdf (1.77 MB)

Tipus de document

Article

Versió

Versió publicada

Data de publicació

2020-08-27

Tots els drets reservats

Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/171151

Fishing alters the ecological significance of colour morphs in a temperate coastal fish

Títol de la revista

Autors

Director/Tutor

ISSN de la revista

Títol del volum

Recurs relacionat

https://doi.org/10.3354/meps13440

Resum

Resource partitioning in polymorphic fish species is expected to be altered by human exploitation, as individual specialization is density dependent in many vertebrates. We tested this hypothesis using the ballan wrasse Labrus bergylta as a model species. We compared the isotope niches of the plain and spotted morphs of the species in a marine protected area (MPA) and in adjoining areas open to fishing, both off Galicia (NW Spain). Underwater visual census confirmed a threefold increase in the biomass of the ballan wrasse off Cíes Islands compared to areas open to recreational fishing, thus demonstrating that populations outside MPAs are well below carrying capacity. The stable isotope ratio of C revealed differences in the resource use patterns of plain and spotted ballan wrasses both in areas open and closed to fishing, as plain wrasses were always depleted in 13C compared to sympatric spotted ones. The stable isotope ratio of N showed that plain ballan wrasses foraged consistently at a higher trophic level than spotted ones in areas of high population density closed to recreational fishing, whereas differences did not exist or were reversed in areas open to fishing. These results demonstrate that the pattern of trophic resource partitioning two morphs of the ballan wrasse is density-dependent and that plain and spotted ballan wrasses likely had different ecological niches in pristine ecosystems.

Matèries

Indústria pesquera, Ecologia de les costes, Influència de l'home en la natura

Matèries (anglès)

Fisheries, Coastal ecology, Effect of human beings on nature

Citació

Col·leccions

Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

Citació

CARDONA PASCUAL, Luis, REÑONES, Olga, GOURAGINE, Adam, SAPORITI, Fabiana, AGUILAR, Àlex, MORANTA, Joan. Fishing alters the ecological significance of colour morphs in a temperate coastal fish. _Marine Ecology Progress Series_. 2020. Vol. 648, núm. 179-190. [consulta: 27 de febrer de 2026]. ISSN: 0171-8630. [Disponible a: https://hdl.handle.net/2445/171151]

Exportar metadades

JSON - METS

Compartir registre