Trophodynamics and diet overlap of small pelagic fish species in the Bay of Biscay

Handle URI:
http://hdl.handle.net/10754/579839
Title:
Trophodynamics and diet overlap of small pelagic fish species in the Bay of Biscay
Authors:
Bachiller, E; Irigoien, Xabier ( 0000-0002-5411-6741 )
Abstract:
Small pelagic fish are the link between planktonic production and higher trophic levels. Competition for resources may play a role in the population dynamics of species, some of them probably standing out from the others due to greater feeding success. It is therefore important to understand the trophic niche of species overlapping both spatially and temporally. In this study, we have investigated the diet, prey preference, trophic niche breadth and diet overlap of the 8 major small pelagic species (anchovy, sardine, sprat, Atlantic and Mediterranean horse mackerel, bogue, Atlantic mackerel and Atlantic chub mackerel) inhabiting the Bay of Biscay. Results indicate that all fish feed mainly on calanoid copepods, incorporating larger prey like euphausiids and decapods to complete their diet. Differences in ingested prey diversity seem to be more limited by the available zooplankton at sea than by a specific diet preference by fish species, resulting in an overall high diet overlap, especially within clupeids but also between clupeids and other (larger) predator species. Consumption estimations for different prey groups could therefore determine whether such a large diet overlap between small pelagic fish, together with spatial co-occurrence, results in competition or enhances the effects of intraguild predation, which is important in terms of an ecosystem approach to fisheries management.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Trophodynamics and diet overlap of small pelagic fish species in the Bay of Biscay 2015, 534:179 Marine Ecology Progress Series
Publisher:
Inter-Research Science Center
Journal:
Marine Ecology Progress Series
Issue Date:
27-Aug-2015
DOI:
10.3354/meps11375
Type:
Article
ISSN:
0171-8630; 1616-1599
Additional Links:
http://www.int-res.com/abstracts/meps/v534/p179-198/
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorBachiller, Een
dc.contributor.authorIrigoien, Xabieren
dc.date.accessioned2015-10-18T14:33:23Zen
dc.date.available2015-10-18T14:33:23Zen
dc.date.issued2015-08-27en
dc.identifier.citationTrophodynamics and diet overlap of small pelagic fish species in the Bay of Biscay 2015, 534:179 Marine Ecology Progress Seriesen
dc.identifier.issn0171-8630en
dc.identifier.issn1616-1599en
dc.identifier.doi10.3354/meps11375en
dc.identifier.urihttp://hdl.handle.net/10754/579839en
dc.description.abstractSmall pelagic fish are the link between planktonic production and higher trophic levels. Competition for resources may play a role in the population dynamics of species, some of them probably standing out from the others due to greater feeding success. It is therefore important to understand the trophic niche of species overlapping both spatially and temporally. In this study, we have investigated the diet, prey preference, trophic niche breadth and diet overlap of the 8 major small pelagic species (anchovy, sardine, sprat, Atlantic and Mediterranean horse mackerel, bogue, Atlantic mackerel and Atlantic chub mackerel) inhabiting the Bay of Biscay. Results indicate that all fish feed mainly on calanoid copepods, incorporating larger prey like euphausiids and decapods to complete their diet. Differences in ingested prey diversity seem to be more limited by the available zooplankton at sea than by a specific diet preference by fish species, resulting in an overall high diet overlap, especially within clupeids but also between clupeids and other (larger) predator species. Consumption estimations for different prey groups could therefore determine whether such a large diet overlap between small pelagic fish, together with spatial co-occurrence, results in competition or enhances the effects of intraguild predation, which is important in terms of an ecosystem approach to fisheries management.en
dc.language.isoenen
dc.publisherInter-Research Science Centeren
dc.relation.urlhttp://www.int-res.com/abstracts/meps/v534/p179-198/en
dc.rightsArchived with thanks to Marine Ecology Progress Seriesen
dc.subjectDiet compositionen
dc.subjectPrey preferenceen
dc.subjectDiet overlapen
dc.subjectSmall pelagic fishen
dc.subjectBay of Biscayen
dc.titleTrophodynamics and diet overlap of small pelagic fish species in the Bay of Biscayen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalMarine Ecology Progress Seriesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionMarine Research Division, AZTI Foundation, Herrera Kaia Portualdea, z/g 20110, Pasaia (Gipuzkoa), Spainen
dc.contributor.institutionPelagic Fish Research Group, Institute of Marine Research (IMR), PO Box 1870, Nordnes 33, 5817 Bergen, Norwayen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorIrigoien, Xabieren
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