A ecomorfologia da ictiofauna refletindo a seleção de habitat em um riacho de mata atlântica no norte do Espírito Santo
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Data
2019-04-02
Autores
Costa, Larissa Pereira
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Universidade Federal do Espírito Santo
Resumo
The Itaúnas river, one of the main rivers in the northern region of Espírito Santo, has suffered from anthropic impacts and is considered one of the most degraded rivers in the state. The study of ecomorphology had as objective to relate the morphology of fishes in different points with the occupation and ecological aspects, verifying the relation of ecomorphology with habitat. All points were sampled with trawl nets or sieves, in the period of July, October, November 2017 and February 2018. The results suggest that the ichthyofauna has been suffering from habitat loss, since the same species were observed in all the points, presence of greater number of tolerant species and decrease of the demanding ones in relation to the ichthyofauna expected for that region. This may be affecting the ecomorphological diversity, leading to a generalization in the importance of attributes, as observed for AR (Relative Height), which presented importance in the ecomorphological structuring of most of the analysed species, indicating little variation among the attributes. Correlation analysis shows that more demanding species may be suffering more from anthropogenic impacts. Thus, the poor state of Itaúnas river conservation, with the loss of environmental heterogeneity due to anthropic pressures, such as deforestation and erosion, seems to explain the pattern of similar ecomorphological characteristics and greater occurrence of generalist species.
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Itaúnas River , Anthropic impacts , Ecomorphology , Ichthyofauna , Ecomorfologia , Ictiofauna
Citação
COSTA, Larissa Pereira. A ecomorfologia da ictiofauna refletindo a seleção de habitat em um riacho de mata atlântica no norte do Espírito Santo. 2019. 53 f. Dissertação (Mestrado em Biodiversidade Tropical) - Universidade Federal do Espírito Santo, Centro Universitário Norte do Espírito Santo, São Mateus, 2019.