Evolution of treefrogs' calls in tropical islands might be under directional selection

Autor(es)

Reboucas, Raoni ^{[1, 2]} ; Augusto-Alves, Guilherme ^{[1, 3]} ; Toledo, Luis Felipe ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Biol Anim, Lab Hist Nat Anfibios Brasileiros LaHNAB, Inst Biol, Cidade Univ Zeferino Vaz, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Programa Posgrad Biol Anim, Inst Biol, Campinas - Brazil

^[3] Univ Estadual Campinas, Programa Posgrad Ecol, Inst Biol, Campinas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ZOOLOGY; v. 312, n. 1 MAY 2020.
• Citações Web of Science: 0

Resumo

Animals that present migration restrictions are especially interesting to study isolation effects in the context of island biogeography theory. Among these effects, behavioral traits are one of the least studied subjects. The treefrog Boana albomarginata presents gigantism in some Atlantic islands and, therefore, examining its advertisement calls may be an opportunity to test the Island Rule with a behavioral trait. Hence, we compared calls, body and tympanum sizes of populations of this species in Brazilian islands and mainland sites. We tested if call frequencies of island individuals differed from mainland ones, also considering the influence of body size and its relationship with tympanum diameter. One of the island population had larger body size and lower call frequencies than any other populations. We suggest that to be a result of directional selection. We also observed lack of correlation between body size and advertisement call frequencies in some populations, implying that males and females cannot use calls as a proxy of the calling male's size, which may indicate a rare case of relaxed selection. Therefore, this is the first evidence of relaxed selection in animal communication, as a consequence of recent insularity. (AU)

• Processo FAPESP: 19/03170-0 - Sinalização acústica, sísmica e visual: investigando a comunicação multimodal em anuros neotropicais
• Beneficiário: Guilherme Augusto Alves
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/25358-3 - O fungo quitrídio no Brasil: da sua origem às suas consequências
• Beneficiário: Luis Felipe de Toledo Ramos Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Temático