Vocal and territorial behavior in the Smith frog (Hypsiboas faber): Relationships with plasma levels of corticosterone and testosterone

Autor(es)

de Assis, Vania Regina ^[1] ; Navas, Carlos Arturo ^[1] ; Mendonca, Mary T. ^[2] ; Gomes, Fernando Ribeiro ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Dept Fisiol, BR-05508900 Sao Paulo - Brazil

^[2] Auburn Univ, Dept Biol Sci, Auburn, AL 36849 - USA

• Tipo de documento: Artigo Científico
• Fonte: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY; v. 163, n. 3-4, p. 265-271, NOV 2012.
• Citações Web of Science: 16

Resumo

The possible trade-off between the roles of glucocorticoids as facilitators of energy substrate mobilization and neural inhibitors of sexual behavior during breeding season is under debate. We studied the relationship between calling and territorial behavior with plasma levels of corticosterone (CORT) and plasma levels of testosterone (T) across the breeding season of Hypsiboas faber, a large and territorial Neotropical treefrog. We investigated these relationships through focal observations of males calling naturally, followed by blood sampling for hormonal radioimmunoassay. We additionally used an experimental approach, which consisted of broadcasting recorded advertisement calls for 10 min to simulate an invasion in the territory of the focal subjects, followed by behavioral observation and blood sampling for hormonal radioimmunoassay. Results showed a pattern of co-variation between CORT and T across the breeding season. Furthermore, individual variation in CORT and T was related to different aspects of behavior: individuals with higher CORT showed higher calling rates, and individuals with higher steroid levels, mainly T, showed higher responsivity to social stimulation by other males in the chorus. Experimental simulation of territorial intrusion by using playback of advertisement calls of this species did not elicit consistent changes in agonistic behavior and CORT, but decreased T in focal males. (C) 2012 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 06/06276-4 - Estudo da relação entre os níveis plasmáticos de corticosterona e o comportamento territorial e vocal no sapo martelo (Hypsiboas faber)
• Beneficiário: Vania Regina de Assis
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 07/05972-0 - RELAÇÃO ENTRE OS NÍVEIS PLASMÁTICOS DOS HORMÔNIOS CORTICOSTERONA E TESTOSTERONA NO COMPORTAMENTO TERRITORIAL, VOCAL E CONSTRUÇÃO DE NINHO NO SAPO MARTELO (Hypsiboas faber).
• Beneficiário: Vania Regina de Assis
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 03/01577-8 - Causas e correlações da variação fisiológica: papel dos gradientes ambientais e comportamentais em diferentes níveis de organização
• Beneficiário: Carlos Arturo Navas Iannini
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 06/54699-1 - Fragmentação das florestas, distribuição geográfica e evolução fisiológica em anuros neotropicais
• Beneficiário: Fernando Ribeiro Gomes
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores