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Feeding ecology of the green turtle Chelonia mydas in northern Peru

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dc.contributor.author Jimenez, A.
dc.contributor.author Pingo, S.
dc.contributor.author Alfaro-Shigueto, J.
dc.contributor.author Mangel, J. C.
dc.contributor.author Hooker, Y.
dc.date.accessioned 2019-01-25T16:36:29Z
dc.date.available 2019-01-25T16:36:29Z
dc.date.issued 2017
dc.identifier.uri https://hdl.handle.net/20.500.12866/4848
dc.description.abstract Diet and food preferences of the green turtle Chelonia mydas were analyzed based on digestive tract contents of dead specimens caught incidentally by an artisanal gillnet fishery in Sechura Bay, northern Peru. We examined 27 digestive tracts and identified 35 prey items. The sampled turtles were all juveniles (CCL = 53.7 +/- 1.2 cm, range 40.5-67.0 cm). The prey items were grouped into six categories: algae, cnidarians, mollusks, arthropods, chordates and garbage/anthropogenic debris. The items with the highest Frequency of Occurrence values (% FO) were: Caulerpa filiformis (77.8%), Loligo gahi (eggs) (51.9%) and Rhodymenia corallina (44.4%). By weight (% W), the most important items, were L. gahi (eggs) (33.3%), Stomolophus sp. (7.3%) and Aphos porosus (6.5%). According to the Preponderance Index (%IP), the preponderant item was L. gahi (eggs) with 6.1% and 61.2% during winter-spring and summer-autumn, respectively. According to the Resultant Weight index (Rw) of wet items, the most important items were: C. filiformis (13.1%), L. gahi (eggs) (10.5%), R. corallina (7.4%), plastic (7.5%), Gigartina chamissoi (5.1%). Garbage/anthropogenic debris was common in the digestive tracts analyzed. Plastic items had a frequency of occurrence of 44.4%. A greater diversity of food items was observed during summer and autumn. This study shows that juvenile C. mydas forage on a variety of resources. We recommend that conservation plans, land use planning and future management plans in the Sechura Bay include green turtles as a sentinel species for monitoring biodiversity of marine resources and the degree of pollution in the Bay. en_US
dc.language.iso eng
dc.publisher SciELO
dc.relation.ispartof urn:issn:0718-560X
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Peru en_US
dc.subject Fisheries en_US
dc.subject Marine & Freshwater Biology en_US
dc.subject gulf-of-california en_US
dc.subject bahia magdalena en_US
dc.subject baja-california en_US
dc.subject Chelonia mydas en_US
dc.subject coastal foraging area en_US
dc.subject colombian pacific en_US
dc.subject diet en_US
dc.subject east pacific en_US
dc.subject gorgona-national-park en_US
dc.subject sea-turtles en_US
dc.subject Sechura en_US
dc.subject small-scale fisheries en_US
dc.subject trophic ecology en_US
dc.title Feeding ecology of the green turtle Chelonia mydas in northern Peru en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.3856/vol45-issue3-fulltext-8
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.00 es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#4.01.08
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.11

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