Publications des scientifiques de l'IRD

Receveur A., Allain V., Ménard Frédéric, Lebourges Dhaussy Anne, Laran S., Ravache A., Bourgeois K., Vidal Eric, Hare S. R., Weimerskirch H., Borsa Philippe, Menkès Christophe. (2022). Modelling marine predator habitat using the abundance of its pelagic prey in the tropical South-Western Pacific. Ecosystems, 25 (6), 757-779. ISSN 1432-9840.

Titre du document
Modelling marine predator habitat using the abundance of its pelagic prey in the tropical South-Western Pacific
Année de publication
2022
Type de document
Article référencé dans le Web of Science WOS:000683652800001
Auteurs
Receveur A., Allain V., Ménard Frédéric, Lebourges Dhaussy Anne, Laran S., Ravache A., Bourgeois K., Vidal Eric, Hare S. R., Weimerskirch H., Borsa Philippe, Menkès Christophe
Source
Ecosystems, 2022, 25 (6), 757-779 ISSN 1432-9840
Understanding the ecological mechanisms underpinning distribution patterns is vital in managing populations of mobile marine species. This study is a first step towards an integrated description of the habitats and spatial distributions of marine predators in the Natural Park of the Coral Sea, one of the world's largest marine-protected areas at about 1.3 million km(2), covering the entirety of New Caledonia's pelagic waters. The study aims to quantify the benefit of including a proxy for prey abundance in predator niche modelling, relative to other marine physical variables. Spatial distributions and relationships with environmental data were analysed using catch per unit of effort data for three fish species (albacore tuna, yellowfin tuna and dolphinfish), sightings collected from aerial surveys for three cetacean guilds (Delphininae, Globicephalinae and Ziphiidae) and foraging locations identified from bio-tracking for three seabird species (wedge-tailed shearwater, Tahiti petrel and red-footed booby). Predator distributions were modelled as a function of a static covariate (bathymetry), oceanographic covariates (sea surface temperature, chlorophyll-a concentration and 20 degrees C-isotherm depth) and an acoustically derived micronekton preyscape covariate. While distributions were mostly linked to bathymetry for seabirds, and chlorophyll and temperature for fish and cetaceans, acoustically derived prey abundance proxies slightly improved distribution models for all fishes and seabirds except the Tahiti petrel, but not for the cetaceans. Predicted spatial distributions showed that pelagic habitats occupied by predator fishes did not spatially overlap. Finally, predicted habitats and the use of the preyscapes in predator habitat modelling were discussed.
Plan de classement
Limnologie biologique / Océanographie biologique [034] ; Sciences du monde animal [080] ; Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
MER DE CORAIL
Localisation
Fonds IRD [F B010082668]
Identifiant IRD
fdi:010082668
Contact