Feeding and migration habits of white shark Carcharodon carcharias (Lamniformes: Lamnidae) from Isla Guadalupe inferred by analysis of stable isotopes d15N and d 13C
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| Format: | Artículo científico |
| Langue: | en |
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Universidad de Costa Rica
2014
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| author | Mario Jaime-Rivera |
| author_facet | Mario Jaime-Rivera |
| contents | Feeding and migration habits of white shark Carcharodon carcharias (Lamniformes: Lamnidae) from Isla Guadalupe inferred by analysis of stable isotopes d15N and d 13C Mario Jaime-Rivera Javier Caraveo-Patiño Mauricio Hoyos-Padilla Felipe Galván-Magaña Biología Key words Pinnipeds white shark mixing models feeding habits Stable isotope composition of marine top predator’s tissues provides insight information of its trophic ecology and migratory behavior. Previous reports have shown that dermal tissues could record longer patterns of hunting and movement. Based on this, the aim of this study was to describe the feeding and migratory habits of the white shark from Isla Guadalupe, using stable isotopic analysis of dermis. We considered a small subset of many possible prey taxa that the sharks could have eaten throughout their migration: pinnipeds, squid and tuna. We grouped the data in five focal areas: Gulf of California, Coast of California, Isla Guadalupe, SOFA and Hawaii. We performed a Bayesian mixing model to study the trophic ecology of this top predator. Average isotopic values for dermis tissue of white shark were δ 13 C (-14.5‰) and δ 15 N (19.1‰). Corrected white shark dermal mean values to resemble muscle were δ 13 C (-16.6‰) and δ 15 N (21.2‰). Mixing model data from dermis showed predation in offshore areas such the SOFA and a main importance of pinnipeds as prey of the white shark in Isla Guadalupe. Rev. Biol. Trop. 62 (2): 637-647. Epub 2014 June 01. 2014 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44931383019 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.62 |
| format | Artículo científico |
| id | redalyc_44931383019 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Feeding and migration habits of white shark Carcharodon carcharias (Lamniformes: Lamnidae) from Isla Guadalupe inferred by analysis of stable isotopes d15N and d 13C Mario Jaime-Rivera Biología Key words Pinnipeds white shark mixing models feeding habits Feeding and migration habits of white shark Carcharodon carcharias (Lamniformes: Lamnidae) from Isla Guadalupe inferred by analysis of stable isotopes d15N and d 13C Mario Jaime-Rivera Javier Caraveo-Patiño Mauricio Hoyos-Padilla Felipe Galván-Magaña Biología Key words Pinnipeds white shark mixing models feeding habits Stable isotope composition of marine top predator’s tissues provides insight information of its trophic ecology and migratory behavior. Previous reports have shown that dermal tissues could record longer patterns of hunting and movement. Based on this, the aim of this study was to describe the feeding and migratory habits of the white shark from Isla Guadalupe, using stable isotopic analysis of dermis. We considered a small subset of many possible prey taxa that the sharks could have eaten throughout their migration: pinnipeds, squid and tuna. We grouped the data in five focal areas: Gulf of California, Coast of California, Isla Guadalupe, SOFA and Hawaii. We performed a Bayesian mixing model to study the trophic ecology of this top predator. Average isotopic values for dermis tissue of white shark were δ 13 C (-14.5‰) and δ 15 N (19.1‰). Corrected white shark dermal mean values to resemble muscle were δ 13 C (-16.6‰) and δ 15 N (21.2‰). Mixing model data from dermis showed predation in offshore areas such the SOFA and a main importance of pinnipeds as prey of the white shark in Isla Guadalupe. Rev. Biol. Trop. 62 (2): 637-647. Epub 2014 June 01. 2014 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44931383019 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.62 |
| title | Feeding and migration habits of white shark Carcharodon carcharias (Lamniformes: Lamnidae) from Isla Guadalupe inferred by analysis of stable isotopes d15N and d 13C |
| topic | Biología Key words Pinnipeds white shark mixing models feeding habits |
| url | https://www.redalyc.org/articulo.oa?id=44931383019 |