Feeding ecology of the green turtle Chelonia mydas in northern Peru

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...

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Autores principales:	Jiménez,Astrid, Pingo,Sergio, Alfaro-Shigueto,Joanna, Mangel,Jeffrey C, Hooker,Yuri
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2017
Materias:	diet Chelonia mydas Sechura Peru small-scale fisheries
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2017000300008
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spelling	oai:scielo:S0718-560X20170003000082017-09-14Feeding ecology of the green turtle Chelonia mydas in northern PeruJiménez,AstridPingo,SergioAlfaro-Shigueto,JoannaMangel,Jeffrey CHooker,Yuri diet Chelonia mydas Sechura Peru small-scale fisheries 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 Aphosporosus (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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.45 n.3 20172017-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2017000300008en10.3856/vol45-issue3-fulltext-8
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	diet Chelonia mydas Sechura Peru small-scale fisheries
spellingShingle	diet Chelonia mydas Sechura Peru small-scale fisheries Jiménez,Astrid Pingo,Sergio Alfaro-Shigueto,Joanna Mangel,Jeffrey C Hooker,Yuri Feeding ecology of the green turtle Chelonia mydas in northern Peru
description	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 Aphosporosus (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.
author	Jiménez,Astrid Pingo,Sergio Alfaro-Shigueto,Joanna Mangel,Jeffrey C Hooker,Yuri
author_facet	Jiménez,Astrid Pingo,Sergio Alfaro-Shigueto,Joanna Mangel,Jeffrey C Hooker,Yuri
author_sort	Jiménez,Astrid
title	Feeding ecology of the green turtle Chelonia mydas in northern Peru
title_short	Feeding ecology of the green turtle Chelonia mydas in northern Peru
title_full	Feeding ecology of the green turtle Chelonia mydas in northern Peru
title_fullStr	Feeding ecology of the green turtle Chelonia mydas in northern Peru
title_full_unstemmed	Feeding ecology of the green turtle Chelonia mydas in northern Peru
title_sort	feeding ecology of the green turtle chelonia mydas in northern peru
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2017000300008
work_keys_str_mv	AT jimenezastrid feedingecologyofthegreenturtlecheloniamydasinnorthernperu AT pingosergio feedingecologyofthegreenturtlecheloniamydasinnorthernperu AT alfaroshiguetojoanna feedingecologyofthegreenturtlecheloniamydasinnorthernperu AT mangeljeffreyc feedingecologyofthegreenturtlecheloniamydasinnorthernperu AT hookeryuri feedingecologyofthegreenturtlecheloniamydasinnorthernperu
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Feeding ecology of the green turtle Chelonia mydas in northern Peru

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