Escalated aggressive behaviour and facultative parental care in the nest building gladiator frog, Hyla faber Marcio Martins1,4, José P. Pombal, Jr.2, Célio F.B. Haddad3,5 1 Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista, Caixa Postal 199, 13506-900 Rio Claro, SP, Brazil 2 Departamento de Vertebrados, Museu Nacional, Quinta da Boa Vista, 20940-040 Rio de Janeiro RJ, Brazil 3 Museum of Vertebrate Zoology, University of California, Berkeley, California 94720, USA 4 Present address: Departamento de Ecologia Geral, Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461, 05422-970 São Paulo SP, Brazil 5 Permanent address: Departamento de Zoologia, I.B., Universidade Estadual Paulista, 13506-900 Rio Claro, SP, Brazil Abstract. Agonistic encounters and facultative parental care in Hyla faber were observed in two localities in southeastern Brazil. Maximum male density was 0.9 and 3.3 males/m2 in Campinas and Ribeirão Branco, respectively. Aggression was escalated and the highly variable aggressive calls were specific to each phase of the encounter. The last, more aggressive phases rarely occurred in Campinas; in Ribeirao Branco they occurred frequently. Male parental care (egg attendance) was common in Ribeirao Branco while it was never observed in Campinas. Egg attendance lasted one to two nights and was observed
Amphibia-Reptilia – Brill
Published: Jan 1, 1998
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