A5089206639- Reproductive biology and impacts on aquatic species
- Sperm and Testicular Function
- Fish Ecology and Management Studies
- Environmental Toxicology and Ecotoxicology
- Heavy metals in environment
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Aquaculture Nutrition and Growth
- Water Quality and Pollution Assessment
- Animal Genetics and Reproduction
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
Universidade Federal do Pará
2020
Universidade Federal do Rio Grande
2015-2020
Universidade Nilton Lins
2018-2019
National Institute of Amazonian Research
2019
Universidade Católica de Pelotas
2013
Universidade Federal de Pelotas
2013
Cadmium is a natural element found in the earth's crust; it usually associated with other metals, but due to impacts caused by human activity, its concentration has increased aquatic environment. This metal may damage animal reproduction, decreasing rate of fertilization organisms such as fish. Thus, this study aimed evaluate vitro toxicity different concentrations cadmium (0 (control), 0.5, 5, and 10 μg/L) using sperm cells model organism zebrafish, Danio rerio. Structural parameters,...
The use of animals as bioindicators has been useful, especially in the evaluation environmental impact pollutant discharges aquatic ecosystems. This study, aims to assess fish Phalloceros caudimaculatus (known Guaru) a heavy metal sbioindicator. LC50 (96 h) acute toxicity tests potassium dichromate salts, cadmium nitrate, lead II nitrate and zinc sulfate, bioaccumulation metals such cadmium, chromium, were conducted. In test, for three months standard tanks used, with different contamination...
This study aimed to describe the morphology and sperm quality of free-living adult males cururu stingray Potamotrygon wallacei, endemic from Rio Negro basin, Brazilian Amazon. The was collected in loco seminal vesicle region fixed buffered saline formaldehyde solution for further evaluation morphometry, plasma membrane integrity concentration. spermatozoa presented a total length 138.25 ± 1.82 μm with helical shape long head. A high percentage cells intact (98 2%) normal (92 1%) were...
A região do Pontal da Barra é referida pela Base de Dados Tropicais (BDT) como uma área prioritária para preservação. Neste contexto, desenvolveu-se um estudo com o objetivo determinar os teores metais pesados Cu, Pb, Zn e Cd no sedimento desta região, estuário Laguna dos Patos, localizada encontro Canal São Gonçalo a Laguna. amostragem percorreu 4 pontos foi desenvolvida em maio 2010. As amostras passaram extração partir ácidos fortes foram analisadas através espectrofotometria absorção...