1.8 FISH GENETICS
The application of genetics in the study of fish can be described as fish genetics. It is done to improve or achieve a desired traits or characters in fish. Such traits are; better quality of meats better growth rates and survivals, production of hybrids, better tolerance for reduced level of oxygen and salinity etc. fish genetics seek to understand and identify the genetics of fish .
1.9 HISTORY OF FISH GENETICS (BRAZIL)
The beginning of fish genetics in brazil in a permanent and organized way involves research developed early in the sixties by silvio de Almeida Toleda Filho at the bioscience institute of the university of sao Paulo, a research who, is perhaps the most important person in the field of fish genetics in brazil ever since the early years of this discipline. Silvo’s research on fish genetics began in the late 1960’s when ove Fryden bery from Denmark, recognized his work on protein electrophoresis and its application to population genetics of Atlantic cod visited brazil. Protein electrophories generated much interests among brazilian researchers and was a quickly adopted techniques that resulted in the establishment of new research option for laboratories devoted to the study of fish populations. This important research groups in fish genetics were established in Rio Graude do sul by professor Jose levy, in Amazonia by professor Aylton Teixeira, and in parana by professor Emesto Renesto, etc many of these researchers and members of their group have continued to use the protein electrophoresis techniques, even up to this day, for the resolution of fish genetics problems.