Isotopic niches of four commercially important pelagic elasmobranch species captured by the small-scale driftnet fishery of northern Peru

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dc.contributor.authorAlfaro-Cordova, E.es_ES
dc.contributor.authorDel Solar, A.es_ES
dc.contributor.authorGonzalez-Pestana, A.es_ES
dc.contributor.authorAlfaro-Shigueto|, J.es_ES
dc.contributor.authorMangel, J.C.es_ES
dc.date.accessioned6/22/2022 13:33
dc.date.accessioned2022-09-30T17:01:47Z
dc.date.available6/22/2022 13:33
dc.date.available2022-09-30T17:01:47Z
dc.date.issued2018
dc.description.abstractDespite the high landings of elasmobranch in Peru, little is known about some aspects of their basic biology, including their trophic ecology. The present study aims to provide basic information regarding the isotopic niche and trophic interactions of four pelagic elasmobranchs of commercial importance in northern Peru (Alopias spp., Galeorhinus galeus, Sphyrna zygaena, and Mobula japanica). One hundred and twenty-four samples were collected from fishing activities between January and December 2015 and processed for stable isotopes analysis (δ13C and δ15N), using Bayesian statistics to describe their isotopic niche. Differences between species were assessed using PERMANOVA and PERMDISP, allowing testing length, sex, and latitude as covariates. These combined results suggest trophic redundancy among sharks. However, unique areas of no overlap in the SEAC of all species could evidence a broad niche with a low interaction between these sharks. M. japanica had no overlap with any shark species, which indicates a trophic niche that is distinct from other elasmobranch top predators. Increasing sample size and including temporal covariates should help define these isotopic niches better, either by merging or splitting the studied elasmobranchs into more specific groupings. Further complementary studies are required to better understand trophic interactions within the pelagic community ecosystems. © 2018, Escuela de Ciencias del Mar. All rights reserved.es_ES
dc.formatapplication/pdfes_ES
dc.identifier.doi10.3856/vol46-issue2-fulltext-24es_ES
dc.identifier.urihttps://doi.org/10.3856/vol46-issue2-fulltext-24
dc.language.isoenges_ES
dc.publisherEscuela de Ciencias del Mares_ES
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/es_ES
dc.sourceLatin American Journal of Aquatic Researches_ES
dc.subjectAgricultural and Biological Scienceses_ES
dc.subjectEarth and Planetary Scienceses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#4.01.00es_ES
dc.titleIsotopic niches of four commercially important pelagic elasmobranch species captured by the small-scale driftnet fishery of northern Perues_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
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