Time and seasonal patterns of activity of phyllostomid in fragments of a stational semidecidual forest from the Upper Paraná River, Southern Brazil

Abstract

Bats may exhibit different patterns of activity, considering aspects concerning niche dynamics as well as the establishment and permanence of the communities in the ecosystems. In this way, the present study analyzed the time and seasonal patterns of activity in different species of frequent phyllostomid bats in remnants of the stational semidecidual forest from the Upper Paraná River, Southern Brazil. Captures were performed between January and December, 2006, using 32 mist nets set above the soil along the nocturnal period during the four seasons of the year. The daily and seasonal patterns of activity of each species was modeled using generalized linear models with Poisson error. The best model was selected using Akaike's Information Criterion (AICc). Artibeus planirostris (Spix, 1823) did not exhibit a conspicuous time pattern, whereas A. lituratus (Olfers, 1818) was more frequent after the sixth hour and A. fimbriatus Gray, 1838 had an activity increase along the night. Platyrrhinus lineatus (E. Geoffroy, 1810) was registered during all sampling hours. Carollia perspicillata (Linnaeus, 1758) and Sturnira lilium (E. Geoffroy, 1810) were the most active during the first four hours. Concerning seasonal pattern, the highest activity of these species was verified during the summer. These data contribute to the information about the ecology of bats in the region, highlighting the high adaptive potential of the species studied in relation to the use of space throughout the night and in to variations in environmental conditions. Keywords: phyllostomid bats, time activity, seasonal activity, stational semidecidual forest. Padrões de atividade horária e sazonal de morcegos filostomídeos em fragmentos de floresta estacional semidecidual do alto rio Paraná, sul do Brasil ResumoOs morcegos podem exibir diferentes padrões de atividade, considerando-se aspectos relacionados à dinâmica de nicho e ao estabelecimento e permanência das comunidades nos ecossistemas. Assim, o presente estudo teve por objetivo investigar o padrão de atividade horária e sazonal em diferentes espécies de morcegos, frequentes em remanescentes de floresta estacional semidecidual do alto rio Paraná, sul do Brasil. As coletas foram realizadas entre janeiro e dezembro de 2006, com o auxílio de 32 redes armadas acima do solo, ao longo de todo o período noturno e nas quatro estações do ano. A análise dos dados contemplou o uso de modelos lineares generalizados Akaike's Information Criterion (AICc) e distribuição de Poisson. Artibeus planirostris (Spix, 1823) não exibiu um padrão horário conspícuo, enquanto A. lituratus (Olfers, 1818) foi mais frequente após a sexta hora e A. fimbriatus Gray, 1838 teve aumento da atividade ao longo da noite. Platyrrhinus lineatus (E. Geoffroy, 1810) foi registrado durante todas as horas de amostragem. Carollia perspicillata (Linnaeus, 1758) e Sturnira lilium (E. Geoffroy, 1810) foram mais ativos nas quatro primeiras horas. Em relação ao padrão sazonal, constatou-se maior atividade dessas espécies durante o verão. ...

Activity patterns of frugivorous phyllostomid bats in an urban fragment in southwest Amazonia, Brazil

“…Bernard (2002), in a study on continuous forest in the Amazon, obtained similar results for the frugivorous species, but also registered two peaks of activity for Carollia, one at 19:00 and another at 01:00. The same pattern was observed by Ortêncio-Filho et al For large frugivorous, as Artibeus lituratus and A. planirostris, we observed a peak of activity in the three hours after sunset (19:00 and 20:00 respectively) and an increase of activity near dawn, corresponding to the results found in other forest fragments by Aguiar & MarinhoFilho (2004) and Ortêncio-Filho et al (2010). In studies conducted in continuous forest, Bernard (2002) observed a bimodal pattern for A. planirostris, which probably is a common feature of the species in continental regions.…”

Resources partitioning in a fruit bat community of the southern Atlantic Forest, Brazil

“…Both Artibeus had similar patterns of activity at the end of the night; a similar overlap has been reported by Ortencio Filho et al (2010). In Amazonia, Artibeus lituratus also had its activity peak before dawn; however it did not overlap with other Artibeus species.…”

“…This is a well known pattern in bat ecology in the Neotropical region (Marinho-Filho and Sazima 1989, Bernard 2002, Aguiar and Marinho-Filho 2004, Ortencio Filho et al 2010. High activity before sunrise is common among Neotropical bats (Brown 1968).…”

“…Time can be used by species in different ways, such as variation throughout the year or periods of the night (Marinho-Filho and Sazima 1989, Aguiar and Marinho-Filho 2004, Ortencio Filho et al 2010. Fruit bats tend to be more active in the evening.…”

Influence of abiotic variables on the bat fauna of a granitic cave and its surroundings in the state of São Paulo, Brazil

“…This fact was evidenced for bat assemblages from the Amazonian forest (Bobrowiec et al 2014) and from Atlantic Rainforest (Ribeiro-Mello 2009, Ortêncio-Filho et al 2010, Stevens & Amarilla-Stevens 2012, Stevens 2013, Lourenço et al 2014. For cave bats from Atlantic Rainforest in the Alto Ribeira region, São Paulo state, Trajano (1985) and Arnone (2008) suggested the existence of seasonality, at least for some species.…”