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| Depestele, Jochen; Feekings, Jordan; Reid, David G; Cook, Robin; Gascuel, Didier; Girardin, Raphael; Heath, Michael; Hernvann, Pierre-yves; Morato, Telmo; Soszynski, Ambre; Savina-rolland, Marie. |
| A scavenger is an animal that feeds on dead animals (carrion) that it has not killed itself. Fisheries discards are often seen as an important food source for marine scavengers so the reduction of discards due to the Landing Obligation may affect their populations. The literature on scavenging in marine ecosystems is considerable, due to its importance in the trophic ecology of many species. Although discards undoubtedly contribute to these species’ food sources, few can be seen to be solely dependent on carrion (including discards). Ecosystem models predicted that discards contributed very little to the diet of scavengers at a regional scale. A reduction in discards through the Landing Obligation may therefore affect populations for a few species in some... |
| Tipo: Text |
Palavras-chave: Carrion; Discard consumption; Food subsidies; Food web models; Scavengers. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00473/58436/61011.pdf |
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| Depestele, Jochen; Rochet, Marie-joelle; Doremus, Ghislain; Laffargue, Pascal; Stienen, Eric Willem Maria. |
| Fishery discards subsidise the food supply of a large community of scavenging seabirds, thus significantly influencing seabird ecology. Seabird preference for certain types of discards determines the number and composition of discards available for non-avian marine scavengers. To quantify both portions of discards temporally as well as spatially, we have used a modelling framework that integrates the spatial and temporal variation in seabird distribution, seabird attraction to fishing vessels and discard distribution. The framework was applied to a case study in the Bay of Biscay, where a wide variation in discard consumption was observed across seabird foraging guilds, discard types, periods and locations. Seabirds removed about one-quarter of the Bay of... |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00334/44507/44201.pdf |
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| Depestele, Jochen; Rochet, Marie-joelle. |
| Discards generated from marine fisheries have significantly affected species populations and community composition of seabirds through mechanisms such as competition, predator–prey interactions and nutrient transfer. Our understanding of the fate of discards beyond seabird scavenging is fragmented, but it is likely that similar mechanisms come into play. This study contributes in resolving this knowledge gap by quantifying the amount and composition of discards that become available to scavengers other than seabirds. The key was nevertheless found in revealing seabird discard consumption, as seabirds are likely the first in taking profit of fishery discards due to their high mobility. Their selective consumption determines the composition and amount of... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00310/42146/41458.pdf |
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