Distribution of Live-bearing Fish (IMAGE) Kansas State University Caption This map shows the distribution of live-bearing fish throughout North America, Central America and South America. A Kansas State University study has shown that the evolution of female live-bearing fish is influenced more strongly by natural selection while male evolution is influenced more strongly by sexual selection. Credit Kansas State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.