Trophic ecology of Mustelus schmitti (Springer, 1939) in a nursery area of northern Patagonia |
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| Authors: | Juan Manuel Molina Andrea López Cazorla |
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| Affiliation: | 1. Royal Netherlands Institute for Sea Research (NIOZ), Department of Marine Ecology, P.O. Box 59, NL-1790 AB Den Burg, The Netherlands;2. Alfred Wegener Institute for Polar and Marine Research (AWI), Wadden Sea Station Sylt, D-25992 List, Germany;1. National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Alaska Fisheries Science Center, 7600 Sand Point Way NE, Seattle, WA 98115, USA;2. Institute of Marine Science, University of Alaska Fairbanks, Fairbanks, AK 99775, USA;1. Department of Integrative Biology, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33613, USA;2. Department of Biology, University of Tampa, 401 W. Kennedy Blvd, Tampa, FL 33606, USA;3. Department of Biomaterials, Max Planck Institute of Colloids & Interfaces, Am Muehlenberg 1, D-14476 Potsdam, Germany |
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| Abstract: | Mustelus schmitti is an endangered endemic shark of the southwest Atlantic, and an important economical resource in Argentina, Brazil and Uruguay. The objective of this study was to describe the trophic ecology of M. schmitti in Anegada Bay, its feeding strategy and diet composition, along with the possible dietary shifts, due to season, sex, ontogeny and the different geographical features of the bay. Our results show that M. schmitti is a carnivorous opportunistic predator, feeding on a variety of benthic invertebrates. The diet presented seasonal and ontogenetic variations, while no differences in diet composition were observed between sexes or the different sampling sites. This species behave as a generalize feeder, with a wide trophic spectrum and a diverse diet. |
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