Banca de DEFESA: SHAYANA DE SOUZA OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : SHAYANA DE SOUZA OLIVEIRA
DATE: 30/03/2023
TIME: 14:00
LOCAL: Remota - meet.google.com/tmw-imqu-oga
TITLE:

Population structure of Macrobrachium amazonicum in the reservoir of UHE – Caçu, Caçu, Goiás

KEY WORDS:

freshwater shrimp, abiotic variables

PAGES: 38
BIG AREA: Outra
AREA: Ciências Ambientais
SUMMARY:

This study aimed to evaluate population characteristics of Macrobrachium amazonicum in the Caçu hydroelectric plant reservoir, on the Claro river, in Caçu, state of Goiás, and which environmental variables (pH, turbidity, conductivity, water temperature, dissolved oxygen, nitrate, nitrite, ammonia and phosphorus) influence the intraspecific structure of the population, during the period from September 2021 to September 2022. The specimens were collected in periods of drought and rain, then, in the laboratory, they were categorized into young males, adult males, young females, adult females, ovigerous females and undefined juveniles, the Total Length (CT), Carapace Length (CC) and Weight were also measured. During the sampled period, individuals considered undefined were the majority throughout the campaign (41.03%), followed by males (22.33%) and non-ovigerous females (34.37%) and ovigerous females (2.26%). This greater presence of individuals may be related to the capture area, with a depth of less than 1m, or also that the population may be characterized as a young population. A greater abundance of individuals was observed in places with margins classified in the category of open field with grasses, the most characteristic places in the region. The environmental variables analyzed in relation to abundance were considered significant according to the canonical correspondence analysis. The turbidity parameter was the only one that showed no correlation with CT. The high number of juveniles and the smaller size of males compared to females can provide more information about the different geographically distributed populations of M. amazonicum, mainly about the region where the study took place, a reservoir of a hydroelectric plant. Thus, the study provides valuable information to complement the literature regarding the adaptability of the species in different types of habitats and help assertively define the conservation and management of different types of populations of M. amazonicum, including its place of presence , as this is an important resource for the region's ecosystem.

COMMITTEE MEMBERS:
Presidente - 1217728 - FABRICIO LOPES DE CARVALHO
Externo à Instituição - SERGIO SCHWARZ DA ROCHA - UFRB
Externa à Instituição - MARIANA VELLOSA CAPPARELLI
Externa à Instituição - ERMINDA DA CONCEIÇÃO GUERREIRO COUTO
Externo à Instituição - BRUNO GABRIEL NUNES PRALON