Early impacts of the largest Amazonian hydropower project on fish communities

FW Keppeler, MC Andrade, PAA Trindade… - Science of the Total …, 2022‏ - Elsevier
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 …

Phylogenomics of piranhas and pacus (Serrasalmidae) uncovers how dietary convergence and parallelism obfuscate traditional morphological taxonomy

MA Kolmann, LC Hughes, LP Hernandez… - Systematic …, 2021‏ - academic.oup.com
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 …

Niche partitioning and seasonality may mediate coexistence of piranha species in Amazonian floodplain lakes

FS de Andrade, B Possamai, CEC Freitas… - Hydrobiologia, 2024‏ - Springer
Unraveling factors that enable the coexistence of species occupying similar niches is a
challenge in Ecology. In the Amazon basin, several piranha species (Serrasalmidae) co …

Lip service: Histological phenotypes correlate with diet and feeding ecology in herbivorous pacus

KE Cohen, O Lucanus, AP Summers… - The Anatomical …, 2023‏ - Wiley Online Library
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 …

Food web structure in the **ngu River rapids prior to operation of the Amazon's largest hydropower plant

MC Andrade, FW Keppeler, MA Zuluaga-Gómez… - Aquatic Sciences, 2023‏ - Springer
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 …

Hyperspectral data as a biodiversity screening tool can differentiate among diverse Neotropical fishes

MA Kolmann, M Kalacska, O Lucanus, L Sousa… - Scientific reports, 2021‏ - nature.com
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 …

'Taking fishers' knowledge to the lab': an interdisciplinary approach to understand fish trophic relationships in the Brazilian Amazon

PER Pereyra, G Hallwass, M Poesch… - Frontiers in Ecology …, 2021‏ - frontiersin.org
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 …

Seasonal patterns in the structure of the fish larvae assemblages in the lower Amazon River

RA Cajado, DM Zacardi, CC Arantes… - Freshwater …, 2023‏ - Wiley Online Library
This study assessed the phenology and functional structure of parental stocks of fish larvae,
and evaluated how the species modulate their reproductive activities as a function of natural …

Phenotypic convergence is stronger and more frequent in herbivorous fishes

MA Kolmann, E Poulin, J Rosen… - Integrative and …, 2024‏ - academic.oup.com
Constraints on phenotypic evolution can lead to patterns of convergent evolution, by limiting
the “pool” of potential phenotypes in the face of endogenous (functional, developmental) or …

Body shape separates guilds of rheophilic herbivores (Myleinae: Serrasalmidae) better than feeding morphology

JM Huie, AP Summers, MA Kolmann - … of the Academy of Natural Sciences …, 2019‏ - BioOne
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 …