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Trophic ecology of the black drum, Pogonias cromis (Sciaenidae), in Mar Chiquita coastal lagoon (Argentina)
Author(s) -
Blasina G. E.,
Barbini S. A.,
Díaz de Astarloa J. M.
Publication year - 2010
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.2010.01459.x
Subject(s) - sciaenidae , trophic level , biology , predation , ecology , abundance (ecology) , benthic zone , foraging , predator , fishery , ecomorphology , fish <actinopterygii> , habitat
Summary This is the first documentation on the feeding habits of the black drum, Pogonias cromis , in waters of South America. The aim of the investigation was to determine the trophic ecology of P. cromis in the Mar Chiquita coastal lagoon (37°32′–37°45′S; 57°19′–57°26′W) from stomach content analyses of 109 P. cromis specimens. Samples in various sizes were collected monthly using various types of fishing gear. The results showed that this species is a benthic predator focusing on bivalves and crabs. permanova results indicated significant seasonal differences in the diet. This pattern reflected seasonal changes in prey abundance and availability, which produced changes in both foraging strategy and trophic niche breadth. This indicates that P. cromis is a versatile predator, adapting its feeding strategy in response to a seasonal shift of prey abundance, and indicating an opportunist behavior.