Hydropower is a threat to freshwater fishes. Despite a recent boom in dam construction, few
studies have assessed their impact on mega-diverse tropical rivers. Using a before-after …

Complex prey processing requires the repositioning of food between the teeth, as
modulated by a soft tissue appendage like a tongue or lips. In this study, we trace the …

Abstract The Amazon and neighboring South American river basins harbor the world's most
diverse assemblages of freshwater fishes. One of the most prominent South American fish …

Trophic levels can be applied to describe the ecological role of organisms in food webs and
assess changes in ecosystems. Stable isotopes analysis can assist in the understanding of …

Hyperspectral data encode information from electromagnetic radiation (ie, color) of any
object in the form of a spectral signature; these data can then be used to distinguish among …

Herbivorous fishes feed on stems, leaves, flowers, seeds, fruits, and nuts of diverse aquatic
plants, as well as algae. Pacus are the herbivorous cousins of piranhas and consume a …

Food partitioning among coexisting species is often considered advantageous to minimize
niche overlap and avoid inter-specific competition. Congeneric fish species such as the …

Habitat complexity can substantially alter trophic relationships, such as competitive and
predatory interactions, between fish species. This study aimed to evaluate how trophic …

Studies on the trophic ecology of fish have revealed considerable alimentary plasticity for
the majority of ichthyofauna in tropical rivers. This leads to the prediction that diet reflects the …

The results of recent theoretical studies suggest that food webs are size-structured, with top
predators coupling across different energy sources. However, evidence supporting this …