Busca avançada
Ano de início
Entree
(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.)

Seed dispersal by the lek-forming white-bearded manakin (Manacus manacus, Pipridae) in the Brazilian Atlantic forest

Texto completo
Autor(es):
Cestari, Cesar [1] ; Pizo, Marco Aurelio [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista, UNESP, Dept Zool, BR-13506900 Rio Claro, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF TROPICAL ECOLOGY; v. 29, n. 5, p. 381-389, SEP 2013.
Citações Web of Science: 3
Resumo

The movement patterns of males, females and juveniles of lekking species often differ due to differences in the commitment to lek activities, which may lead to differences in the spatial distribution and dispersal distances of seeds they eat. By sampling seeds in three lek and non-lek areas of the white-bearded manakin (Manacus manacus), we tested whether this lekking species increased the abundance and species richness of seeds in lek areas and, at a finer scale, in 21 displaying courts within lek areas. Combining data on seed defecation or regurgitation rates by free-ranging individuals, the number of seeds in droppings or regurgitations of mist-netted birds, and the distances travelled by birds equipped with radio-transmitters, we estimated the potential spatial distribution of seeds generated by six resident males and six females or juveniles during the morning peak of lek activity and when lek activity decreased in the afternoon. There was no difference in the species richness (46 and 44 morphospecies, respectively) and abundance of seeds (15.4 +/- 7.3 seeds and 14.0 +/- 1.1 seeds, respectively) between lek and non-lek areas. Within leks both parameters increased in courts (45 spp., 17.6 +/- 14 seeds) compared with non-court sites (22 spp., 1.9 +/- 1.8 seeds), likely as a consequence of the longer time spent by resident males in perches in or near display courts. Distances moved by juveniles and females per 60-min period (183 +/- 272 m) were greater than resident males (42.6 +/- 22.0 m) in the mornings, while the opposite happened in the afternoons (55.2 +/- 40.7 m and 157 +/- 105 m, respectively). We conclude that the spatial aggregation of seeds in lek areas of M. manacus occurs at the court level, and the spatial distribution of deposited seeds varies with manakin lekking status and the daily period of foraging. (AU)

Processo FAPESP: 09/17577-3 - Dispersão de sementes por Manacus manacus (Aves, Pipridae) em áreas com e sem atividades de lek: contribuição da espécie para manutenção do ecossistema de restinga
Beneficiário:Marco Aurelio Pizo Ferreira
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 12/20593-3 - Sucesso de acasalamento e custo de forrageamento de uma espécie de ave com sistema reprodutivo de lek: integrando as teorias de seleção sexual e forrageamento ótimo
Beneficiário:César Cestari
Linha de fomento: Bolsas no Brasil - Pós-Doutorado