Banca de DEFESA: CAROLINA MANCINI DO CARMO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : CAROLINA MANCINI DO CARMO
DATA : 08/03/2024
HORA: 08:00
LOCAL: ON LINE
TÍTULO:

Conservation and spatio-temporal distribution of fish with socioeconomic importance in the Araguaia-Tocantins Basin and ethnoichthyology of riverside dwellers/fishermen of the middle Rio das Mortes, Mato Grosso

PALAVRAS-CHAVES:

Cerrado; Amazonia; environmental suitability; ethnoecological knowledge; riverside communities; fishermen.

PÁGINAS: 86
GRANDE ÁREA: Ciências Biológicas
ÁREA: Biologia Geral
RESUMO:

The Amazon Basin, the largest river basin on the planet, encompasses a remarkably diverse environment. Associated with it is the Araguaia-Tocantins Basin, which includes the Rio das Mortes, standing out for its significant ecological, geopolitical and socioeconomic importance, covering the transition between the Cerrado and Amazonia biomes. This thesis is structured in two articles: in the first, we apply spatio-temporal distribution models to analyze the scenarios of the Last Glacial Maximum (LGM), the current situation and future projections of the four fish species most fished and commercialized in the Rio das Mortes, namely: Pseudoplatystoma fasciatum, Brycon falcatus, Myloplus torquatus and Leporinus friderici. The environmental variables that best explained the spatial distribution of these species were altitude, temperature and precipitation. Our projections indicated that all species had extensive environmental suitability niche areas (ESNs) during the LGM, which were continuous and connected. In a future scenario, with an increase of 8.5 ºC in temperature, B. falcatus and P. fasciatum could face the risk of disappearance, and M. torquatus and L. friderici could adapt by modifying their ESNs. We also note that current protected areas do not adequately represent the niche of these species. In the second article, we investigated and compared the perception and ethnoichthyological knowledge of riverside communities and fishermen from three municipalities in the Rio das Mortes Basin, in Mato Grosso: Nova Xavantina (NXA), Nova Nazaré (NNA) and Novo Santo Antônio (NSA). We interviewed 105 people who had lived in the municipality for at least 20 years. We analyzed the data using descriptive statistics and calculated the Use Value of each species. We registered 25 ethnospecies of fish, being 25 in NSA, 20 in NXA and 17 in NNA, with the first three, Pintado, Voadeira and Pacu, coinciding in the three municipalities. We identified groups of species associated with food and commercial interests, with more affordable prices and species that, despite being mentioned as threatened, have a high commercial value. Respondents demonstrated broad knowledge about the relevance of banning fishing during piracema and expressed support for this restriction. The perception of those interviewed emphasized that many species have reduced their populations in the last 20 years due to extreme climatic conditions and environmental changes, and the majority blames the negative impacts recorded on the ichthyofauna on anthropogenic impacts. Thus, our study allowed a deeper understanding of the spatio-temporal dynamics of important fish species in the region, contributing to a scientifically accurate approach to the interaction between environmental factors, distribution and possible impacts on these species and will contribute to the development of efficient protection and management initiatives of fishing resources in the Araguaia-Tocantins and Rio das Mortes basins.

MEMBROS DA BANCA:
Presidente - 82328201 - BEATRIZ SCHWANTES MARIMON
Interno - 118188003 - ERNANDES SOBREIRA OLIVEIRA JUNIOR
Interno - 83215001 - MARIA ANTONIA CARNIELLO
Externo à Instituição - HALINA SOARES JANCOSKI - UNEMAT
Externo à Instituição - LUCÉLIA NOBRE CARVALHO - UFMT
Externo à Instituição - TATIANA LIMA DE MELO -