Contribution to the Knowledge of Two Endangered Fishes of the Jequitinhonha River Basin

Abstract

Objective: Investigate the capture of Brycon devillei and Steindachneridion amblyurum in the Jequitinhonha River basin to contribute to the knowledge of these endemic and endangered species. Theoretical Framework: Based on concepts of ecology and conservation of aquatic species, highlighting the importance of preserving natural habitats for maintaining biodiversity. Theories on the relationship between climatic events and fish capture patterns are also explored. Method: Monthly collections of the species from 2011 to 2015, focusing on the months of October to February. Data collection included the capture of live specimens, which were sent for macro and microscopic analysis at the Machado Mineiro Environmental Station. The relationship between rainy days and reservoir levels with the number of species captured was statistically analyzed. Results and Discussion: Both Brycon devillei and Steindachneridion amblyurum were mainly captured during periods of rain and reservoir filling. There was a significant relationship between capture and rainy days for both species, with p<0.003 for Steindachneridion amblyurum and p<0.002 for Brycon devillei. The discussion contextualizes these findings in light of the theoretical framework, considering the ecological implications. Research Implications: Monitoring the reservoir during rainy days for the conservation of these species. Theoretically, the study highlights the importance of environmental factors in the capture of endangered aquatic species. Originality/Value: Contributes to the literature by providing unprecedented data on Brycon devillei and Steindachneridion amblyurum. The research offers valuable insights for the conservation of endemic fish in impacted habitats.