A5064707330- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Ichthyology and Marine Biology
- Marine animal studies overview
- Coastal and Marine Management
- Aquatic Ecosystems and Phytoplankton Dynamics
- Animal Vocal Communication and Behavior
Universidade Federal de Minas Gerais
2018-2025
Pseudopimelodidae comprises 49 species of freshwater catfish endemic to South America, with limited research on their acoustic behaviour. This study focuses the pacamã Lophiosilurus alexandri Steindachner, 1876, a vulnerable São Francisco River basin, known for its ecological and economic importance. Sound production by this was analysed first time. Three individuals were recorded while being held underwater revealing two distinct sound types (type I type II) associated pectoral fin...
Abstract Serrasalmid fishes form a highly specialized group of biters that show large trophic diversity, ranging from pacus able to crush seeds piranhas capable cutting flesh. Their oral jaw system has been hypothesized be forceful, but variation in bite performance and morphology with respect diet not previously investigated. We tested whether herbivorous species have higher forces, larger muscles more robust jaws than carnivorous species. measured vivo theoretical forces 27 serrasalmid...
Abstract Hypostomus is the most diverse genus within Loricariidae. These catfish species exhibit a very conservative morphology with relatively few external characteristics that differ between different species. In consequence, there challenge to understand distinction of this genus. This study aims describe sounds produced by ten from Araguari River and Paraopeba (Minas Gerais, Brazil), examine whether acoustic features could be used distinguish species, corresponding sound production...
The genus Pygocentrus contains three valid piranha species (P. cariba, P. nattereri and piraya) that are allopatric in tropical subtropical freshwater environments of South America. This study uses acoustic features to differentiate the species. Sounds were recorded two populations (red- yellow-bellied) piraya; providing sound description for first time cariba piraya. Calls distinct from all other studied populations. Red- yellow-bellied calls different each but similar those These...
Abstract Serrasalmus marginatus is a piranha species native from the lower Paraná River basin and has been invasive in upper since 1980s. In piranhas, sounds of different have features. The aim this study was to investigate if produced by could be used distinguish two morphotypes: red‐ yellow‐eyed S. Araguari (upper basin). All temporal frequency features were equivalent both groups eye colour; it corresponds species‐specific signature described for . Nonetheless, amplitude all statistically...
In different teleost species, sound production can utilize specific coding schemes to avoid confusion between species during communication. Piranhas are vocal Neotropical fishes, and both Pygocentrus Serrasalmus produce similar pulsed sounds using the same sound-producing mechanism. this study, we analysed of three nine determine whether be used discriminate piranha at genus levels. Our analysis temporal frequency data supports idea that specific, acoustic features differentiate taxa level....
Abstract Different studies suggest some social calls could be used in fish identification if their specificity is unambiguously assessed. Sounds of different populations piranhas Serrasalmus maculatus Kner, 1858 were recorded to determine homogeneity between rivers inside a single basin (Araguari and Grande River, upper Paraná River basin) separated basins (Amazon basins). All from the produced sounds with similar acoustic features. Consequently, not discernible based on individual sound...
The aging process of reservoirs has been extensively investigated; however, little is known about how fish populations are adjusted after many years impoundment. Thus, this study aimed to compare the diet, length-weight relationship, sizes classes, variation in size, and age Astyanax lacustris Lütken, 1875 collected from lotic lentic habitats an reservoir. group consisted 730 captured fishes. We found that specimens had a wider range size classes (1.0 12.0 cm), were linked high frequency...
ABSTRACT Probabilistic sampling, a classical recommendation for unbiased data, has been often overlooked. Fish sampling in reservoirs, unlike most rivers, can be accomplished by variety of probabilistic designs due to few restrictions the choice sites (SSs). We evaluated whether population metrics Prochilodus lineatus differ between fixed SSs (do not change with each trip) and variable (change Volta Grande (VGR) Jaguara (JR) reservoirs River, Paraná River basin, Brazil. used gillnets sample...