Banca de DEFESA: MARLUCE APARECIDA MATTOS DE PAULA NOGUEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARLUCE APARECIDA MATTOS DE PAULA NOGUEIRA
DATE: 05/12/2023
TIME: 09:00
LOCAL: Universidade Federal de São João del-Rei - Campus Dom Bosco
TITLE:

Evaluation of susceptibility to barotrauma in two species of neotropical
fishes.

KEY WORDS:

Hydroelectric Power, Barotrauma, Mortality, Pressure Variation

PAGES: 50
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Hydroelectric plants in Brazil, driven by abundant water resources, play a
significant role in energy generation, but also pose threats to aquatic ecosystems and fish
diversity in the Neotropical region. Rivers face threats due to the construction of dams and
reservoirs, which lead to the fragmentation of river basins, causing negative impacts on fish
fauna, such as: impaired migrations, exposure to predators, mortality and injuries due to
mechanical shocks, turbulence, shear forces, cavitation, gas supersaturation and pressure
variations can be caused by frequent exposure to turbines or spillways. Decompression, pressure
variation or rapid pressure change during turbine passage, is one of the main threats to fish
passing through plants. This can result in injuries, deaths and other sequelae, such as
hemorrhages, exophthalmos, embolism, positive buoyancy, swim bladder collapse and changes
in behavior. Impacting fish of different sizes and species, making it a growing concern in the
operation of hydroelectric plants and machine maintenance. The present study evaluated the
susceptibility of two species, the Lambari Astyanax bimaculatus and the Grumatã Prochilodus
vimboides, to barotrauma, through simulation of decompression in the laboratory, in a
hyperhypobaric chamber, under different pressure levels and different decompression rates.
Identifying the occurrence of different types of injuries, such as: hemorrhage, embolism,
fracture, exophthalmos, hypertrophied vessels and rupture of the swim bladder, caused by
decompression. The experiments were carried out on 720 fish, 510 lambaris (Astyanax
bimaculatus) and 210 grumatãs (Prochilodus vimboides), in three different experimental
models. It is possible to confirm that the types of injuries are the same by varying the location
and frequency, which allows a better understanding of the effects of decompression on these
two species.

BANKING MEMBERS:
Presidente - 1626222 - ANDREY LEONARDO FAGUNDES DE CASTRO
Interno - 1804372 - FERNANDO CESAR CASCELLI DE AZEVEDO
Externo à Instituição - GUILHERME SOUZA
Externo à Instituição - LUIZ GUSTAVO MARTINS DA SILVA