Sazonalidade e dieta frugívora do saí-andorinha Tersina viridis (Illiger, 1911) em reflorestamento da mata ciliar do Rio Mogi Guaçu, São Paulo, Brasil
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Data
2009-09-01
Autores
Rubim, Paulo [UNESP]
Título da Revista
ISSN da Revista
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Editor
Instituto Virtual da Biodiversidade (BIOTA/FAPESP)
Resumo
Segundo a literatura, Tersina viridis (Illiger, 1911) possui hábito gregário sazonal em deslocamentos locais. Os reais motivos desses deslocamentos ainda são poucos conhecidos. em reflorestamento de mata ciliar do rio Mogi-Guaçu, SP, foi possível quantificar a variação sazonal mensal na densidade populacional durante um ano. O número de indivíduos aumentou substancialmente durante a estação seca e ausência durante a estação chuvosa, assim, caracterizando um comportamento fortemente sazonal de ocorrência nesse local. Provavelmente T. viridis possui algumas rotas de deslocamentos quando aparecem em grandes agregados no período mais seco na região do interior do estado de São Paulo e vizinhanças. A grande abundância de algumas espécies de plantas ornitocóricas pode ser alguns dos motivos que determinam a rota desses deslocamentos na região estudada, e não o padrão geral da fenologia da frutificação das espécies ornitocóricas.
According to the literature, Tersina viridis (Illiger, 1911) has seasonal habit concerning to its local displacements. However, the reasons of such displacements are still poorly known. In reforested gallery forest area of the Mogi-Guaçu river, São Paulo state, Brazil, i quantified the annual variation of the population density of T. viridis throughout a year period every month. The number of individuals of the species increased substantially during the dry season, whereas in the rainy season no individual was observed. These findings suggest a seasonal behavior of the species in this site. They also suggest that T. viridis probably has different routes of displacement in large flocks during the dry season in the interior of the São Paulo state and surroundings. The larger abundances of some ornithocoric plant species may explain the routes of such displacements in the studied site, rather than the general pattern of fruiting of the ornithocoric species.
According to the literature, Tersina viridis (Illiger, 1911) has seasonal habit concerning to its local displacements. However, the reasons of such displacements are still poorly known. In reforested gallery forest area of the Mogi-Guaçu river, São Paulo state, Brazil, i quantified the annual variation of the population density of T. viridis throughout a year period every month. The number of individuals of the species increased substantially during the dry season, whereas in the rainy season no individual was observed. These findings suggest a seasonal behavior of the species in this site. They also suggest that T. viridis probably has different routes of displacement in large flocks during the dry season in the interior of the São Paulo state and surroundings. The larger abundances of some ornithocoric plant species may explain the routes of such displacements in the studied site, rather than the general pattern of fruiting of the ornithocoric species.
Descrição
Palavras-chave
sazonalidade, plantas ornicocóricas, Tersina viridis, Trema micrantha, seasonality, ornitocoric plant, Tersina viridis, Trema micrantha
Como citar
Biota Neotropica. Instituto Virtual da Biodiversidade | BIOTA - FAPESP, v. 9, n. 3, p. 111-115, 2009.