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Using stable isotopes analysis to understand ontogenetic trophic variations of the scalloped hammerhead shark at the Galapagos Marine Reserve.
Cerutti-Pereyra, Florencia; Salinas-De-León, Pelayo; Arnés-Urgellés, Camila; Suarez-Moncada, Jennifer; Espinoza, Eduardo; Vaca, Leandro; Páez-Rosas, Diego.
Afiliação
  • Cerutti-Pereyra F; Charles Darwin Research Station, Charles Darwin Foundation, Puerto Ayora, Galapagos Islands, Ecuador.
  • Salinas-De-León P; Charles Darwin Research Station, Charles Darwin Foundation, Puerto Ayora, Galapagos Islands, Ecuador.
  • Arnés-Urgellés C; Save Our Seas Foundation Shark Research Center and Guy Harvey Research Institute, Nova Southeastern University, Dania Beach, Florida, United States of America.
  • Suarez-Moncada J; Charles Darwin Research Station, Charles Darwin Foundation, Puerto Ayora, Galapagos Islands, Ecuador.
  • Espinoza E; Galápagos National Park Directorate, Puerto Ayora, Galápagos, Ecuador.
  • Vaca L; Galápagos National Park Directorate, Puerto Ayora, Galápagos, Ecuador.
  • Páez-Rosas D; Migramar Marine Research and Conservation Network, Olema, California, United States of America.
PLoS One ; 17(6): e0268736, 2022.
Article em En | MEDLINE | ID: mdl-35687546
Changes in life-history requirements drive trophic variations, particularly in large marine predators. The life history of many shark species is still poorly known and understanding their dietary ontogeny is a challenging task, especially for highly migratory species. Stable isotope analysis has proven as a useful method for examining the foraging strategies of sharks and other marine predators. We assessed the foraging strategies and ontogenetic changes of scalloped hammerhead sharks, Sphyrna lewini, at Galapagos Marine Reserve (GMR), by analysing δ13C and δ15N signatures in different maturity stages. Our isotopic results suggest ontogenetic shifts in resource use between sub-adult and adult stages, but not between adult and juvenile stages. Carbon isotopic signatures found in the juvenile stage were enriched in contrast to sub-adults (~0.73‰) suggesting a combination of the maternal input and the use of coastal resources around the Galapagos Islands. Adult female sharks also showed enrichment in δ13C (~0.53‰) in comparison to sub-adult stages that suggest feeding in high primary productivity areas, such as the GMR. This study improves the understanding of the trophic ecology and ontogenetic changes of a highly migratory shark that moves across the protected and unprotected waters of the Eastern Tropical Pacific.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tubarões Limite: Animals Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Equador País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tubarões Limite: Animals Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Equador País de publicação: Estados Unidos