The Impact of Fisheries Discards on Scavengers in the Sea

Type Book section
Date 2018
Language English
Author(s) Depestele Jochen1, Feekings Jordan2, Reid David G3, Cook Robin4, Gascuel Didier5, Girardin Raphael6, Heath Michael4, Hernvann Pierre-Yves5, Morato Telmo7, Soszynski Ambre7, Savina-Rolland MarieORCID8
Affiliation(s) 1 : Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Oostende, Belgium
2 : National Institute of Aquatic Resources, DTU Aqua, Technical University of Denmark, Hirtshals, Denmark
3 : Marine Institute, Oranmore, County Galway, Ireland
4 : Department of Mathematics and Statistics, University of Strathclyde, Glasgow, UK
5 : Université Bretagne Loire, Agrocampus Ouest, UMR 985 Ecology and Ecosystem Health, Rennes, France
6 : Ifremer, Channel and North Sea Fisheries Research Unit, Boulogne sur Mer, France
7 : Marine and Environmental Sciences Centre (MARE), Institute of Marine Research (IMAR) and OKEANOS Research Unit, Universidade dos Açores, Horta, Portugal
8 : Ifremer, Fishery Technology and Biology Laboratory, Lorient, France
Book The European Landing Obligation, S. S. Uhlmann et al. (eds.), 2018. ISBN 978-3-030-03307-1 ISBN 978-3-030-03308-8 (eBook) https://doi.org/10.1007/978-3-030-03308-8.Chap.7, pp.129-162
DOI 10.1007/978-3-030-03308-8_7
Keyword(s) Carrion, Discard consumption, Food subsidies, Food web models, Scavengers
Abstract

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 areas, but generally this is unlikely to be the case. But it is challenging to identify how important discards might be to scavengers, as they are taxonomically diverse and vary in the role they play in scavenging interactions.

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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 (2018). The Impact of Fisheries Discards on Scavengers in the Sea. In The European Landing Obligation, S. S. Uhlmann et al. (eds.), 2018. ISBN 978-3-030-03307-1 ISBN 978-3-030-03308-8 (eBook) https://doi.org/10.1007/978-3-030-03308-8.Chap.7, pp.129-162 (Springer Nature). https://archimer.ifremer.fr/doc/00473/58436/