Compreendendo a influência da qualidade ambiental na comunidade de peixes de um Rio no Norte do Espírito Santo.

• Ano de defesa: 2019
• Autor(a) principal: Nascimento, Cristiane Alves da Silva do
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Doutorado em Biologia Animal; UFES; Programa de Pós-Graduação em Ciências Biológicas
• Palavras-chave em Português: Atlantic rain forest; Degradation; Feeding; Diversity; Mata Atlântica; Degradação; Alimentação; Diversidade; Ecologia; Biodiversidade x Conservação; Peixe de água doce; Zoologia; 57
• Link de acesso: http://repositorio.ufes.br/handle/10/11154

The Atlantic rain Forest has been substituted for several economic activities and, among those responsible for the modification of aquatic environments, agriculture and the establishment of cities near water resources are two of the main sources of damages to the river basins, causing changes in the channel, reduction the availability of habitats, extinction of species, among others. The objective of this study was to verify if there is a difference in the ichthyofauna of medium and highly impacted environments, and to understand if small fragments of forest are sufficient to maintain the stability of the aquatic environment in rivers with high anthropogenic pressure; and II - to evaluate the feeding of fish species occurring in two parts of a highly impacted river in the north of the state of Espírito Santo, in order to understand if, in a degraded river, a small stretch of riparian forest is sufficient to maintain the quality of the aquatic life that lives there. The work was carried out in the River Itaúnas located in the state of Espírito Santo. In this river the greatest indicators of anthropic impact were the presence of alien species, absence of points with Habitat Integrity Index within the high class and dominance of tolerant species. Signs of lower quality of the most impacted point are in the results obtained with the condition factor and the low number of trophic guilds, followed by a large number of species with high food overlays, an indicative of greater homogenization of the environment and supply of few food items. Feeding in both the forested and impacted environments was predominantly autochthonous, indicating that the Itaúnas river basin is degraded to the whole. However, the presence of a greater number of guilds in the forested environment may be indicative that a small fragment of forest still presents nuances that indicates that this is a place that offers larger niches to be explored by the fish community. It is possible to conclude that, even in highly degraded environments, small forest fragments are important for the maintenance of the aquatic biota, since they remain more stable and offer a greater range of niches to be explored.