Reproductive characteristics of captive male jaguars (Panthera onca) - Morato, Ronaldo Gonçalves; Guimarães, Marcelo Alcindo de Barros Vaz; Ferreira, Fernando; Verreschi, Ieda Terezinha do Nascimento; Barnabe, Renato Campanarut (Brazilian Journal of Veterinary Research and Animal Science, 1999)