Filling gaps in the ecological knowledge on Auchenipteridae catfishes (Ostariophysi: Siluriformes): first data for Trachelyichthys exilis
| Autor: | Tiago Magalhães da Silva FREITAS, Jansen ZUANON |
|---|---|
| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Acta Amazonica, Vol 52, Iss 2, Pp 158-161 (2022) |
| Druh dokumentu: | article |
| ISSN: | 0044-5967 1809-4392 |
| DOI: | 10.1590/1809-4392202102582 |
| Popis: | ABSTRACT The feeding habit of Trachelyichthys exilis is described for the first time, with additional comments on its growth type and size at sexual maturity. We analyzed 42 specimens from the Amanã Reserve (Amazonas state, Brazil) collected with a seine net amidst stands of floating herbaceous vegetation during the dry season of 2002. Stomach contents revealed a predominantly carnivorous habit (tending to piscivorous), an isometric growth type, and size at maturity around 5.5 cm standard length. Based on the biological characteristics of the consumed prey, we presume that T. exilis forage actively during the twilight/night around and among the root tangle of herbaceous vegetation, preying upon nocturnally active animals such as small fishes and aquatic invertebrates, and/or close to the water surface, where diurnally active prey usually rests. Our findings provide essential information to fill knowledge gaps on the natural history of auchenipterid catfishes, especially on trophic ecology. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|