A5023487264- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Reproductive biology and impacts on aquatic species
- Aquaculture Nutrition and Growth
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Sperm and Testicular Function
- Environmental Toxicology and Ecotoxicology
- Heavy Metal Exposure and Toxicity
- Physiological and biochemical adaptations
- Mercury impact and mitigation studies
- Aquaculture disease management and microbiota
- MicroRNA in disease regulation
- Autophagy in Disease and Therapy
- Reproductive Biology and Fertility
- Pesticide Exposure and Toxicity
- Pesticide and Herbicide Environmental Studies
- Ichthyology and Marine Biology
- Animal Genetics and Reproduction
- Effects and risks of endocrine disrupting chemicals
- Agricultural and Food Sciences
- Heavy metals in environment
- Extracellular vesicles in disease
- Animal Vocal Communication and Behavior
- Aquatic life and conservation
Pontifícia Universidade Católica de Minas Gerais
2015-2024
Universidade Federal de Minas Gerais
2004-2019
Catholic University of America
2000-2006
The increasing amounts of heavy metals entering aquatic environments can result in high accumulation levels these contaminants fish and their consumers, which pose a serious risk to ecosystems human health. We investigated the concentrations mercury (Hg), cadmium (Cd), zinc (Zn), chromium (Cr), lead (Pb) muscle, liver, spleen tissues Pseudoplatystoma corruscans specimens collected from two sites on Paraopeba River, Brazil. level was often higher viscera (i.e. liver spleen) than thus, should...
Oocyte morphology, embryogenesis and early larval development were compared in Hoplerythrinus unitaeniatus , Hoplias lacerdae malabaricus (Characiformes: Erythrinidae) by macroscopical, histological, histochemical ultrastructural analyses. The eggs of the three species yellowish adhesive, containing carboxyl sulphate radicals glycoconjugates zona radiata. A complex surface arrangement was identified oocytes H. while had a simple oocyte pattern. Lectin histochemistry revealed different...
To study the reproductive biology of Astyanax fasciatus (Cuvier, 1819) in Furnas Reservoir, Minas Gerais, Brazil, a total 1307 specimens were captured bimonthly sampling from August 1993 to July 1994. The sex ratio showed predominance females, representing 65.2% sample. stages gonadal maturation and spawning type determined through macro- microscopic analysis gonads as well by variation gonadosomatic indices. A. fractionated reproduction throughout year, with peaks influenced water...
We studied the relationship between morphology of reproductive system and strategies six neotropical catfishes using macroscopic microscopic analyses. The examined Siluriformes showed diversified characteristics, but permitted their being grouped according to three strategies: pelagic spawning, demersal internally fertilizing. spawners Pseudoplatystoma corruscans Conorhynchos conirostris have testes that are characterized by filiform lobes, absence testicular secretion, full-grown oocytes...
Fish can tolerate prolonged periods of fasting more easily than endothermic organisms. However, these are associated with pronounced lipid and protein catabolism body weight loss. We evaluated the use reserves, growth performance, histology intestines muscles Colossoma macropomum subjected to for 45 days refeeding 14 days. used 66 juvenile C. (71.78 ± 10.75 g) distributed in 10 tanks 100 L a recirculating aquaculture system (RAS) kept 6 fish separate tank, considered basal group. The were...
This is the first evidence of programmed cell death, or apoptosis, occurring in postovulatory follicle (POF) teleost fish. Females Astyanax bimaculatus lacustris were submitted to induced ovulation through injecting pituitary extract. Ultrastructural analyses POFs at time intervals varying from zero four days postspawning showed several characteristic events apoptosis. Typical apoptotic figures, such as nucleus with chromatin condensation underlying nuclear envelope a crescent pattern and...
AbstractAutophagy, a highly conserved catabolic program for degrading proteins and organelles, is essential cell tissue homeostasis. Primarily, this process has cytoprotective role under nutrient deprivation, but several stress stimuli can induce autophagy and, thus, distinct programmed death (PCD) pathways be actived when not abolished. Fish ovaries are suitable experimental model system studying the mechanisms of PCD due to presence postovulatory atretic (i.e., non-ovulated) follicles,...
A total of 312 adults matrinxã were captured bimonthly, between 2011-2012, in two sites the rio São Francisco: immediately downstream Três Marias Dam (site 1) and confluence with Abaeté 2). Specimens Brycon orthotaenia from site 2 presented higher values length (32.24 ± 5.70 cm for females 26.64 3.79 males) body weight (506.66 332.17 g 267.36 145.84 males), when compared 1. In was registered highest GSI means (9.97 2.96 0.93 0.52 1 means. Reproduction period occurred October to February....