| Remarks |
Currently known from the upper Gaira and Rio Frio drainages, in the Sierra Nevada of Santa Marta, Caribbean coastal drainages of northern Colombia; captured in streams characterized by relatively rapid water current, running over rocky and sandy bottoms with high transparency; the pH was near neutral, dissolved oxygen and percent saturation of oxygen values were high typical of oligotrophic environments; Hemibrycon sierraensis is allopatric with H. santamartae, a species found in the more eutrophic waters of the Rancheria River and its tributaries; analysis of stomach contents of four specimens revealed presence of filamentous algae, fragments of vascular plants, adults and larvae of two different species of Trichoptera (Hydropsychidae), adult Formicidae and fragments of unidentified arthropods; the presence of allochthonous and autochthonous items suggests that this species is omnivorous (Ref. 118119). |