Ecologia de populações de morcegos cavernícolas em uma região cárstica do sudeste do Brasil

摘要: The upper valley of the Rio Ribeira, a carbonatic rock region in south state Sao Paulo, Brazil, has great number caves; bat community area is subject present study. Between October 1978 and 1980 specimens five families 23 species were captured. showed an irregular distribution among 32 39 caves visited. very diversified, consisting specially abundant (Desmodus rotundus), some common (Carollia perspicillata, Artibeus lituratus Anoura caudifer), several rare species. It differs from other neotropical communities studied relatively high frequence A. caudifer, which probably takes over ecological role Glossophaga soricina, diversity medium to large sized Phyllostominae. relative abundance related availability food afforded by farms domestic stock N important for herbivorous hematophagous mainly Phyllostominae D. rotundus. suggested that structure roost's primarily determined location: more isolated cave, greater diversified tends be its community, regardless caveis morphometric characteristies («opportunistic occupation»). Only densely grouped factors such as size would tend importance. Due roosts lotv sociability bats, Upper Ribeira populations distributed all available caves, have small (with exception ones) varying density through year. occurrence certain individual seems affected presence others same roost: lituratus, Diphylla ecaudata Chrotopterus auritus occupy rotundus, whereas Puripterus horrens caudifer avoid them. Common «sunset-related» timing flight activity. emergence majority begins at dusk, but activity peak cave entrance varies duration. strictly insectivorous (Peropterix macrotis, Myotis nigricans P. also leave roost earlier, showing during crepuscle; others, occurs after darkening. A few species, rotundus Lonchorhina aurita, emerge only total darkness. use temporary, nocturnal frequent occurring or foraging activities; individuals can ingesting places. C. perspicillata finishes feeding activities earlier than indicates efficiency. With exceptions, bats do not carry their young foraging. supply represented animals (poultry pigs); wild may significant prey.