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

Sebastian A. Klarian, Augusto Cornejo, Pauline Sallaberry-Pincheira, Patricio Barría, Roberto Meléndez


DOI: https://doi.org/10.3856/vol44-issue2-fulltext-25

Abstract


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.


Klarian S, Cornejo A, Sallaberry-Pincheira P, Barría P, Meléndez R. Assessing the trophic position of two sharks from the open waters of the southeastern Pacific Ocean. Lat. Am. J. Aquat. Res.. 2017;44(2): 429-432. Available from: doi:10.3856/vol44-issue2-fulltext-25 [Accessed 22 Apr. 2019].
Klarian, S., Cornejo, A., Sallaberry-Pincheira, P., Barría, P., & Meléndez, R. (2017). Assessing the trophic position of two sharks from the open waters of the southeastern Pacific Ocean. Latin American Journal of Aquatic Research, 44(2), 429-432. doi:http://dx.doi.org/10.3856/vol44-issue2-fulltext-25