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Linking size-based trophodynamics and morphological traits in marine fishes

2019-03Journal article Restricted access
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dc.contributor.authorRios, Maria F.
dc.contributor.authorVenerus, Leonardo A.
dc.contributor.authorKarachle, Paraskevi K.
dc.contributor.authorReid, William D. K.
dc.contributor.authorErzini, Karim
dc.contributor.authorStergiou, Konstantinos I.
dc.contributor.authorGalvan, David E.
dc.date.accessioned2020-07-24T10:52:46Z
dc.date.available2020-07-24T10:52:46Z
dc.date.issued2019-03
dc.description.abstractThe rule of thumb in marine trophodynamics indicates that the bigger an organism, the higher its trophic level (TROPH). This generalization leads to the assumption that fishes increase their TROPH with growth. However, a recent review showed that for many species, TROPH does not increase with body size, suggesting that size-independent feeding is not rare in marine fishes. Here, we assessed some morphological traits of marine fishes that could potentially be used as indicators for the ability to vary TROPH with body size. Stable isotope values of nitrogen were used as a proxy TROPH. The specific objectives were as follows: (a) to evaluate the relationship between the oral gape and the trophodynamic trend and (b) to quantify the relevance of 11 external morphological traits in determining the size-based trophodynamics. We used random forest models to identify the morphological traits that would help predict which species would have the potential to increase TROPH with growth and which would have not. The selected traits included the pelvic fin relative position, the dorsal fin shape, total length, and relative mouth size. Our results also showed a marked relationship between the rate of increase in the oral gape and TROPH. The analyses presented here provide the first comprehensive and quantitative review aiming at linking the trophodynamics of marine fishes with external morphological traits.
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1111/faf.12347
dc.identifier.issn1467-2960
dc.identifier.issn1467-2979
dc.identifier.urihttp://hdl.handle.net/10400.1/14403
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.subjectBody-size
dc.subjectStable-isotopes
dc.subjectTrophic position
dc.subjectFeeding-habits
dc.subjectPrey capture
dc.subjectMouth
dc.subjectLocomotion
dc.subjectAbundance
dc.subjectForm
dc.subjectPredators
dc.titleLinking size-based trophodynamics and morphological traits in marine fishes
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage367
oaire.citation.issue2
oaire.citation.startPage355
oaire.citation.titleFish and Fisheries
oaire.citation.volume20
person.familyNameErzini
person.givenNameKarim
person.identifier.ciencia-idD917-7133-341A
person.identifier.orcid0000-0002-1411-0126
person.identifier.ridM-5216-2013
person.identifier.scopus-author-id7004015948
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublicatione20f0e2d-3085-4c37-9e98-260dc9faddea
relation.isAuthorOfPublication.latestForDiscoverye20f0e2d-3085-4c37-9e98-260dc9faddea

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