A5016435956- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Hydrology and Sediment Transport Processes
Instituto Florestal
2024
Universidade Federal de Lavras
2012-2022
Abstract The establishment of national parks are an important and often‐used tool to protect biodiversity. However, when considering freshwater ecosystems, many these areas in Brazil habitat mosaics which a small part the ecosystem is protected strongly influenced by surrounding environment. By assessing fish fauna their diversity patterns five (NPs) within Brazilian savanna, we discuss whether new NPs or expansion current conservation limits would potentially conserve additional species. We...
Although the Aiuruoca River is recognized as a very important area for fish fauna, species composition of this river remains unknown or restricted to technical reports licensing projects. The aim study was describe and distribution ichthyofauna in basin. Fifty-eight collection points were sampled along basin during 2010 2011, including 38 streams, 11 lagoons 9 main channel. A total 8562 specimens collected belonging 6 orders, 15 families, 33 genera 47 species. pirapetinga (Brycon nattereri)...
In dammed rivers, the conservation of free-flowing tributaries is considered an important strategy to mitigate negative effects dam on fish communities. this study, we evaluated importance a tributary river as reproductive migration route. From August 2012 July 2013, hydroacoustics data were collected alongside active sampling using cast nets and ichthyoplankton in São Francisco Abaeté rivers. Cast net captured 738 individuals detected 42196 fishes. almost all samples sites, preferential...
ABSTRACT Trophic structure of fish assemblages is one the most sensitive indicators changes in streams environments. Since it crucial to understand response trophic groups habitat alteration, our study aimed address this research gap by assessing influence substrate composition, meso-habitat variability, and bank stability, on richness, biomass, number individuals carnivores, invertivores, omnivores, herbivorous-detritivores. Using an electrofishing device, we sampled 13 Atlantic rainforest...
This work aimed to evaluate the relationship between parameters of fish communities and habitat structure a stream. Twenty three stretches six meters long were evaluated in Samambaia stream located inside Sumidouro Park, Rio das Velhas basin, state Minas Gerais, Brazil. Fish samplings characterization made for each stretch. Seven variables (vegetal cover, width, depth, substrate, flow, presence aquatic plants leaf litter) two characterizing longitudinal gradient (altitude distance from...
The determination of natural variation in physical habitat conditions and the establishment least-disturbed reference standards is important for ecosystem conservation. Tropical regions hold most global freshwater diversity, nevertheless little known about their habitats. We calculated 255 metrics 31 stream sites five protected areas Brazilian São Francisco River basin to identify variable characteristics among tropical streams areas. performed principal components analyses (PCA) find...
The Neotropical region exhibits a remarkable diversity of freshwater fish, with the Upper Grande River in La Plata basin emerging as significant yet underexplored hotspot. However, this is confronted escalating threats from human activities, such hydroelectric damming and urbanization, which jeopardize its ichthyofauna. This research conducted comprehensive inventory ichthyofauna River, covering diverse environments sub-basins. Fish sampling at 185 sites revealed over 94 species, indicating...
Alterations in environmental conditions may cause changes to fish assemblages regarding their composition and distribution. This study aimed describe the ichthyofauna of Sumidouro system compare it with found Lagoa Central. The is a preserved aquatic biome located on Rio das Velhas drainage central Brazil while Central an environment under anthropogenic impact inside Santa city. Sampling was carried out, October 2012. similarity both systems evaluated four different scenarios, built from...
The ichthyofauna of the Rio São Francisco basin is relatively well-documented. However, most this knowledge concentrated at upper stretch its catchment area. In study, we compile a list species encompassing almost entire length Carinhanha, an important tributary from upper-middle section Francisco, including comprehensive diversity environments. A total 99 8 orders and 27 families were recorded. Five are considered non-native, six classifieds as long distance migrants, three vulnerable. with...
Abstract Despite the large number of dams in most important rivers Brazil, little is known about fish vertical distribution neotropical reservoirs, especially deep ones. This study aims to understand how were vertically distributed deepest reservoir located Jequitinhonha River. Three areas sampled quarterly using an echosounder. The detected was at 115 m, but shallower than 25 m. Diel migration detected, not all sampling and campaigns. Fish determined by several limnological factors...