A5070510580- Aquaculture Nutrition and Growth
- Reproductive biology and impacts on aquatic species
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Sperm and Testicular Function
- Fish Biology and Ecology Studies
Universidade Estadual Paulista (Unesp)
2021-2024
The objective of this study was to temporally identify sex differentiation morphologically characterize the formation female and male germinal epithelium verify occurrence disproportion reported for species in aquaculture. Specimens Brycon orbignyanus cultivated water recirculation systems with a constant temperature 27 ± 0.5°C were used. Monthly samplings B. (n = 15) performed from two months age until 1 year age, posteriorly isolated sampling on specimens three years age. gonads removed...
Abstract Brycon orbignyanus exhibits seasonal reproduction where males can be distinguished from females by the roughness present in anal fin of specimens that represents a secondary sexual characteristic known as hooks. This study aimed to describe appearance and morphology hooks on B. relate them phases reproductive cycle these animals determine parameter used for selection suitable use induced reproduction. Monthly male different ages were collected (n = 50 total; n 10/month) euthanised,...
Piracanjuba, Brycon orbignyanus, is an important rheophilic species for aquaculture studies on genetic diversity, spermatogenesis, semen cryopreservation and taxonomy. Due to anthropic actions its population has been declining, resulting in the loss of natural stocks, thus pushing near extinction. No stereological analysis spermatogenesis piracanjuba performed. The present study aimed evaluate B. orbignyanus using quantify number germ cells Sertoli cells, spermatogonial generations, yield,...