Seasonal variation in the diet of the bat anoura caudifer (Phyllostomidae: Glossophaginae) at the southern limit of its geographic range

• Autorzy: Barros M.A.S. , Rui A. M. , Fabian M. E.
• Języki publikacji: EN

Abstrakty

EN

Glossophagine bats feed mainly on flower products, but often eat also insects and fruits. The composition of their diet may change according to climate seasonality. In the present study we analyzed the diet of the bat Anoura caudifer at the southernmost limit of its geographic distribution, the Atlantic Forest of southern Brazil. We identified food items and plant species consumed by A. caudifer and tested the hypothesis that its diet varies seasonally. We collected fecal material monthly from October 2003 to September 2004 in a day roost of A. caudifer. We obtained a total of 1,166 fecal samples: 1,029 (88%) samples contained pollen, 592 (51%) contained insects, and 196 (17%) contained seeds. The hypothesis that diet varies seasonally was corroborated. There was high consumption of nectar and pollen in all seasons, especially in spring (98%), high consumption of insects mainly in summer and autumn (60%), and high consumption of fruits in winter (41%) and summer (24%). Anoura caudifer consumed pollen and nectar of 10 plant species, mainly of Marcgravia polyantha, and fruits of six species, mainly of Piper gaudichaudianum. Anoura caudifer has primarily a pollinivorous/insectivorous diet at the southern limit of its distribution, and, in contrast to other studies, it also eats fruits at some times of the year. Visits to flowers of 10 species, four of which not matching the syndrome of chiropterophily, and consumption of fruits of six species indicate a generalistic behavior of A. caudifer in the study area. This flexibility may have been crucial to the maintenance of A. caudifer populations at the southern limit of its distribution, and also for the persistence of batpollinated plants in local ecosystems.

• Wydawca: -
• Czasopismo: Acta Chiropterologica
• Rocznik: 2013
• Tom: 15
• Numer: 1
• Opis fizyczny: p.77-84,ref.

Twórcy

autor

Barros M.A.S.

• Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Bento Gonçalves 9500, 91.540-000 Porto Alegre (RS), Brazil
• Present address: Departamento de Fisiologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova s/n°, 59.078-970 Natal (RN), Brazil

autor

Rui A. M.

• Departamento de Ecologia, Zoologia e Genética, Instituto de Biologia, Universidade Federal de Pelotas, Campus Universitário Capão do Leão s/n°, CP 354, 96.001-970 Pelotas (RS), Brazil

autor

Fabian M. E.

• Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Bento Gonçalves 9500, 91.540-000 Porto Alegre (RS), Brazil

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