Assessing the trophic position of two sharks from the open waters of the southeastern Pacific Ocean

• Klarian, Sebastian A. ^[1] ; Cornejo, Augusto ^[2] ; Sallaberry-Pincheira, Pauline ^[1] ; Barría, Patricio ^[3] ; Meléndez, Roberto
  1. [1] Universidad Andrés Bello

     Universidad Andrés Bello

     Santiago, Chile

     
  2. [2] Museo Nacional de Historia Natural
  3. [3] Instituo de Fomento Pesquero

  Mostrar afiliaciones +
• Localización: Latin American Journal of Aquatic Research, ISSN-e 0718-560X, ISSN 0716-1069, Vol. 44, Nº. 2, 2016, págs. 429-432
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Stable isotope analyses for shortfin mako (Isurus oxyrinchus) and blue sharks (Prionace glauca) were conducted to assess their trophic position in two periods of time (before 1980 and after 2000) in the Southeastern Pacific waters (SEP). Both sharks showed that their trophic position decreased over time (P < 0.05). Many factors could be involved in this change such as dietary shifts, prey availability, or indirect fishing effects in SEP waters.