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- Title
Diet Composition and Feeding Strategy of the New World Silverside <italic>Odontesthes argentinensis</italic> in a Temperate Coastal Area (South America).
- Authors
Thompson, Gustavo A.; Volpedo, Alejandra V.
- Abstract
Abstract: The diet composition and feeding strategy of the New World silverside <italic>Odontesthes argentinensis</italic> were evaluated in a temperate coastal area during austral summer. This species is an economically significant resource for the fishing industry in South America. The food preference of <italic>O. argentinensis</italic> varied with its size‐class: the smallest size‐classes preferred diatoms and annelids, larger size‐classes seemed to prefer barnacle cypris larvae, and the largest size‐classes showed a preference for decapod megalopa larvae. Plankton samples were dominated by calanoid and cyclopoid copepods; however, contrary to what was expected, <italic>O. argentinensis</italic> showed negative selectivity for both groups. A selectivity index indicated that <italic>O. argentinensis</italic> selects the food it eats with regard to prey availability in the environment. The information obtained in this study demonstrates the importance of knowing the food preference of <italic>O. argentinensis</italic> to obtain a better condition factor, which will be key to its potential farming in closed systems.
- Subjects
ODONTESTHES; SILVERSIDES; ANIMAL feeding; ANIMAL nutrition; PREDATION
- Publication
Marine & Coastal Fisheries: Dynamics, Management & Ecosystem Science, 2018, Vol 10, Issue 1, p80
- ISSN
1942-5120
- Publication type
Article
- DOI
10.1002/mcf2.10005