The best mild and deep anesthesia times in fat snook juveniles for EOLA were obtained with 30 and 180 μL EOLA L−1, respectively, and these times were lower in smaller than larger fish. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

Overall, streams exposed to urbanization and agricultural land use showed discernible erosive processes, alterations in hydrodynamic factors , and destabilized abiotic conditions, such as elevated conductivity and turbidity levels. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

Altogether the obtained results revealed that the Brazilian silverside embryos did not show signs of stress during ontogeny when exposed to a wide range of salinities. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

This study demonstrated that the occurrence of hooks on anal fins in Brycon orbignyanus is a secondary sexual characteristic that is present in both primary and secondary males. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

The otolith shape analysis applied herein was efficient in geographically discriminating the sampled groups and may contribute to a better understanding of the current S. barbatus distribution in the Atlantic Forest. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

The cytogenetic patterns and life history of pelagic fish are beginning to be better analyzed. This is an important step towards better understanding our rich biodiversity and its correlation with the environment where it lives. ni.bio.br/1982-0224-2022… doi.org/10.1590/1982-0…

It evidences the importance of maintaining sites with different substrate composition, depth, and exposure to wind and waves will allow the conservation of fish assemblages dynamics inhabiting seasonal environments in the bays of Ixtapa-Zihuatanejo. ni.bio.br/1982-0224-2023…

It emphasizes the importance of improving fundamental conditions necessary for development of new ecological and taxonomic studies, such as investing in infrastructure, and training taxonomists to decrease the Linnean shortfall. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

The Serra do Cachimbo has a particular biogeographic history with unique faunal elements occurring in each portion of its territory, then it is crucial that conservation efforts in the region considers that territorial plurality. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

The environmental contamination by plastic polymers in the region of Ubatuba, including the aquatic fauna, is a fact, requiring an intervention of the local authorities to reduce this kind of pervasive pollution. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

As the three species analyzed here are exploited by ornamental and subsistence commercial fishing, it is necessary that they receive appropriate management accordingly. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

Both species meet the diagnostic characters of the genus, except for the urogenital papilla in males. In A. ayoreode the urogenital papilla is mostly attached to the anal fin, and in A. accorsii it is only attached basally. ni.bio.br/1982-0224-2024… doi.org/10.1590/1982-0…

The new species is found in Brazil’s Cerrado biome, a biodiversity hotspot home of a wide variety of threatened fish species, then, conservation efforts should focus on strengthening sampling and investigation. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

Results showed shifts in P. brasiliensis trophic pathways, altering the dynamics and the trophic role of the benthic-pelagic coupling. Long-term studies are needed to better understand natural processes in upwelling ecosystems. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

The findings indicate that roadside populations of B. giacopinii inhabiting high-temperature environments exhibit modifications in muscle LDH kinetics parameters, enhancing lactate oxidation. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

The simultaneous presence of some morphological features undoubtedly places Corydoras iiap as a member of the Corydoras clade. ni.bio.br/1982-0224-2024… doi.org/10.1590/1982-0…

Due to the dynamics of occupation of the species’ natural environments, and its restriction to preserved environments, the severe fragmentation of the population can be inferred, and the new species was categorized as Endangered. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

Since C. perobana is the first Cambeva species described from the rio Piquiri and the second from the rio Ivaí, we emphasize the importance of these rivers, which in their headwater regions probably still harbor other new species. ni.bio.br/1982-0224-2023… doi.org/10.1590/1982-0…

Larger species exhibit greater specialization, contributing to the maintenance of distinct modules within the network. Smaller ones connect these modules, directly influencing the flow of energy across the network. ni.bio.br/1982-0224-2024… doi.org/10.1590/1982-0…