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A global perspective on the trophic geography of sharks

  • Christopher S. Bird
  • , Ana Veríssimo
  • , Sarah Magozzi
  • , Kátya G. Abrantes
  • , Alex Aguilar
  • , Hassan Al-Reasi
  • , Adam Barnett
  • , Dana M. Bethea
  • , Gérard Biais
  • , Asuncion Borrell
  • , Marc Bouchoucha
  • , Mariah Boyle
  • , Edward J. Brooks
  • , Juerg Brunnschweiler
  • , Paco Bustamante
  • , Aaron Carlisle
  • , Diana Catarino
  • , Stéphane Caut
  • , Yves Cherel
  • , Tiphaine Chouvelon
  • Diana Churchill, Javier Ciancio, Julien Claes, Ana Colaço, Dean L. Courtney, Pierre Cresson, Ryan Daly, Leigh De Necker, Tetsuya Endo, Ivone Figueiredo, Ashley J. Frisch, Joan Holst Hansen, Michael Heithaus, Nigel E. Hussey, Johannes Iitembu, Francis Juanes, Michael J. Kinney, Jeremy J. Kiszka, Sebastian A. Klarian, Dorothée Kopp, Robert Leaf, Yunkai Li, Anne Lorrain, Daniel J. Madigan, Aleksandra Maljković, Luis Malpica-Cruz, Philip Matich, Mark G. Meekan, Frédéric Ménard, Gui M. Menezes, Samantha E.M. Munroe, Michael C. Newman, Yannis P. Papastamatiou, Heidi Pethybridge, Jeffrey D. Plumlee, Carlos Polo-Silva, Katie Quaeck-Davies, Vincent Raoult, Jonathan Reum, Yassir Eden Torres-Rojas, David S. Shiffman, Oliver N. Shipley, Conrad W. Speed, Michelle D. Staudinger, Amy K. Teffer, Alexander Tilley, Maria Valls, Jeremy J. Vaudo, Tak Cheung Wai, R. J.David Wells, Alex S.J. Wyatt, Andrew Yool, Clive N. Trueman
  • University of Southampton
  • National Oceanic and Atmospheric Administration
  • University of Porto
  • College of William and Mary
  • James Cook University Queensland
  • University of Barcelona
  • Sultan Qaboos University
  • Institut français de recherche pour l'exploitation de la mer
  • FishWise
  • Cape Eleuthera Institute
  • Université de La Rochelle
  • Stanford University
  • University of the Azores
  • CSIC - Estación Biológica de Doñana (EBD)
  • UMR7372 CNRS-La Rochelle Université
  • Laboratoire de Biogéochimie des Contaminants Métalliques
  • Florida International University
  • Consejo Nacional de Investigaciones Científicas y Técnicas
  • Université catholique de Louvain
  • University of Alaska Fairbanks
  • Bayworld
  • Save Our Seas Foundation-D'Arros Research Centre (SOSF-DRC)
  • University of Cape Town
  • Health Sciences University of Hokkaido
  • Departamento do Mar IPMA
  • Great Barrier Reef Marine Park Authority
  • Aarhus University
  • University of Windsor
  • University of Namibia
  • University of Victoria BC
  • Universidad Andrés Bello
  • University of Southern Mississippi
  • Shanghai Ocean University
  • CNRS
  • Harvard University
  • Simon Fraser University
  • Sam Houston State University
  • University of Western Australia
  • Aix-Marseille University
  • Griffith University Queensland
  • University of St Andrews
  • CSIRO
  • Texas A&M University at Galveston
  • Texas A&M University
  • Universidad de Bogotá Jorge Tadeo Lozano
  • University of Newcastle
  • Universidad Autónoma de Campeche
  • University of Massachusetts
  • WorldFish Timor-Leste
  • Centre Oceanogràfic de les Balears
  • Nova Southeastern University
  • City University of Hong Kong
  • The University of Tokyo
  • National Oceanography Centre Southampton
  • Centre for the Environment Fisheries and Aquaculture Science

Research output: Contribution to journalArticlepeer-review

132 Scopus citations

Abstract

Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits in trophic interactions between sharks found in different habitats. We show that populations of shelf-dwelling sharks derive a substantial proportion of their carbon from regional pelagic sources, but contain individuals that forage within additional isotopically diverse local food webs, such as those supported by terrestrial plant sources, benthic production and macrophytes. In contrast, oceanic sharks seem to use carbon derived from between 30° and 50° of latitude. Global-scale compilations of stable isotope data combined with biogeochemical modelling generate hypotheses regarding animal behaviours that can be tested with other methodological approaches.

Original languageEnglish
Pages (from-to)299-305
Number of pages7
JournalNature Ecology and Evolution
Volume2
Issue number2
DOIs
StatePublished - Feb 1 2018

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