| [trophic structure of river fish from corral de san luis, magdalena river basin, colombia caribbean]. | ecological studies of species, such as the stomach content analysis, allow us to recognize different trophic groups, the importance of trophic levels and the interrelationships among species and other members of the community. in this investigation, we studied food habits, feeding variation and trophic relationships of the fishes present in streams of the corral de san luis drainage, tubará, atlántico department, a part of the lower magdalena river basin in colombian caribbean. fish samples of a ... | 2016 | 29451765 |