Trophic plasticity of tetra-fish, Psalidodon aff. fasciatus (Cuvier, 1819) (Characidae), in an Atlantic Forest stream of Northeast Brazil
| Autor: | INGRID CAROLINE C. PIRES, FABIANE B. SOUZA, ANDRÉ T. DA SILVA |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Anais da Academia Brasileira de Ciências, Vol 96, Iss 2 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1678-2690 0001-3765 45779074 |
| DOI: | 10.1590/0001-3765202420230652 |
| Popis: | Abstract Trophic plasticity is a distinctive feature of freshwater fishes, representing an essential strategy for fish living in resource-variable environments. We analyzed the stomach contents of individuals sampled in two Atlantic Forest streams to identify the primary food sources consumed by Psalidodon aff. fasciatus and verify the existence of spatial, seasonal, and ontogenetic variations. The diet was determined by analyzing the stomach contents using the Volume Method to quantify the importance of food items. In general, Psalidodon aff. fasciatus was classified as an omnivorous species, consuming mainly insects, plant material, and filamentous algae. The results also showed significant effects for all factors considered (spatial, seasonal, and ontogenetic). Finally, Psalidodon aff. fasciatus demonstrated considerable trophic plasticity, which can result in better use of available resources in the environment and improved resource partitioning, reducing intraspecific and interspecific competition. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|