A5044428652- Reproductive biology and impacts on aquatic species
- Aquaculture Nutrition and Growth
- Sperm and Testicular Function
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Reproductive Biology and Fertility
- Aquaculture disease management and microbiota
- Hepatitis B Virus Studies
- Zebrafish Biomedical Research Applications
- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Fish Biology and Ecology Studies
Universidade Federal do Rio Grande do Sul
2019-2025
This study aimed to evaluate the viability of gametes in zebrafish (Danio rerio), at different rigor mortis stages. Viability assessments were conducted on oocytes various developmental stages using LIVE/DEAD and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) reduction assay. For sperm evaluation, both kinetic (computer-assisted analysis) morphological (Rose Bengal staining) performed. Results demonstrated that progression significantly impacted oocyte during post-rigor...
The containers used in cell cryopreservation are essential to maintain integrity and viability after thawing. This paper reveals the methodology of using biodegradable for fish sperm cryopreservation. Cryopreserved showed high fertility capability. Biodegradable capsules could be alternative plastic straws cryopreservation.Containers cryopreserve made with non-biodegradable compounds, having a monetary environmental cost. Therefore, development is necessary. Thus, this study aimed evaluate...
Brycon hilarii is a neotropical fish whose population in rivers being threatened by overfishing, construction of hydroelectric dams, transposition riverbeds, and pollution. Fundamental knowledge the reproductive characteristics this species necessary to enable its breeding captivity, for aquaculture as well biological conservation. The aim study was investigate describe sperm parameters, their correlations, relevant factors, how these issues can affect quality B. hilarii. Sperm collected...
Density gradient centrifugation is a technique used to wash or separate samples of cryopreserved milt, mainly in humans and bovines allowing, for example, reducing the concentration cryoprotectants choosing best portion sperm. The proposed method seeks reduce presence cryoprotectant milt Rhamdia qhelen obtain fraction better quality Gradient was formed from 90% AllGrad® different times forces were compared. separated sperm presented low increase motility decreased head damage gout, however,...
Phractocephalus hemioliopterus, Hemisorubim platyrhynchos, and Zungaro zungaro are native of South American rivers whose population is being threatened by the damming to build hydroelectric dams, fishing pressure environmental degradation. Basic information on these species' reproductive characteristics necessary enable production in captivity. The aim this study was present descriptive data regarding sperm parameters three species maintained captivity, correlations between parameters,...
Southern black drum ( Pogonias courbina ) is a species distributed along the western Atlantic Ocean, and it largest Sciaenidae observed in coast of Rio Grande do Sul state, Brazil. However, listed as vulnerable at The IUCN Red List Threatened Species™, their fishing prohibited. objective this study was to determine sperm characteristics P. . Sperm samples five young males (two-year-old fish) were collected through abdominal pressure. kinetics parameters motility (MOT) 10.7 ± 5.6%,...
Abstract Anesthesia is a common practice used in fish research and aquaculture. For both applications, it important to understand anesthetics effects on the animal tissues of interest ensure validity data improve welfare. Captive production only possible with artificial reproduction, known that manipulation stressor stimulus fish. The most method determining stress responses measuring circulating level cortisol. Therefore, purpose this study was evaluate different concentrations (100, 200,...