The tetra (Astyanax altiparanae) is a species commercially recognized and widely accepted in the market. Due to some features of its biology and reproduction, such as the fact that they have intermittent spawning, easier management, disease resistance and adaptability to various farming systems, is presenting itself as an interesting model for the creation of a scientific technological package which aims to establish parameters for breeding, rearing, genetic manipulation and induction of polyploidy in fish. However, so that we can successfully reach these goals, it is necessary to have prior knowledge and extremely detailed about their reproductive biology, embryonic development and the environmental factors that condition as well as the morphological patterns that species present during the early stages of life. These basic skills are essential for future studies on chromosome manipulation of the species, since the induction of polyploidy is only successful at the exact moment they occur certain stages of embryogenesis. This project proposes to carry out a detailed morphological description of the early stages of embryonic development of this species, also testing the influence of three different temperatures on the speed and feasibility of embryogenesis.
News published in Agência FAPESP Newsletter about the scholarship: