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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Resource defense polygyny shifts to female defense polygyny over the course of the reproductive season of a Neotropical harvestman

Texto completo
Autor(es):
Buzatto, Bruno A. [1] ; Machado, Glauco [2]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Programa Posgrad Ecol, Inst Biol, Campinas, SP - Brazil
[2] Univ Sao Paulo, Dept Ecol, Inst Biociencias, BR-05508900 Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY; v. 63, n. 1, p. 85-94, NOV 2008.
Citações Web of Science: 35
Resumo

Although studies classify the polygynous mating system of a given species into female defense polygyny (FDP) or resource defense polygyny (RDP), the boundary between these two categories is often slight. Males of some species may even shift between these two types of polygyny in response to temporal variation in social and environmental conditions. Here, we examine the mating system of the Neotropical harvestman Acutisoma proximum and, in order to assess if mate acquisition in males corresponds to FDP or RDP, we tested four contrasting predictions derived from the mating system theory. At the beginning of the reproductive season, males fight with other males for the possession of territories on the vegetation where females will later oviposit, as expected in RDP. Females present a marked preference for specific host plant species, and males establish their territories in areas where these host plants are specially abundant, which is also expected in RDP. Later in the reproductive season, males reduce their patrolling activity and focus on defending individual females that are ovipositing inside their territories, as what occurs in FDP. This is the first described case of an arachnid that exhibits a shift in mating system over the reproductive season, revealing that we should be cautious when defining the mating system of a species based on few observations concentrated in a brief period. (AU)

Processo FAPESP: 03/05427-0 - Custos e benefícios do cuidado maternal no opilião Serracutisoma proximum (Opiliones: Gonyleptidae)
Beneficiário:Bruno Alves Buzatto
Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 02/00381-0 - Investimento parental e evolução do comportamento sub-social em opiliões da família Gonyleptidae (Arachnida: Opiliones)
Beneficiário:Glauco Machado
Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores