Bats from Fazenda Intervales, Southeastern Brazil: species account and comparison between different sampling methods

Abstract

ABSTRACT. Assessing the composition of an area's bat fauna is typically accomplished by using captures or by monitoring echo location calls with bat detectors. The two methods may not provide the same data regarding species composi tion. Mist nets and harp traps may be biased towards samp ling low flying spec ies, and bat detectors biased towards detecting high intensity echo locators. A comparison of the bat fauna of Fazenda Intervales, southeastern Brazil, as revealed by mist nets and harp trap captures, checking roosts and by monitoring echolocation calls offlying bats illustrates this point. A total of 17 species of bats was sampled. F0U11een bat species were captured and the echolocation calls of 12 species were recorded, three of them not revealed by mist nets or harp traps. The different sampling methods provided dilTerent pictures of the bat fauna. Phyllostomid bats dominated the catches in mist nets, but in the field their echolocation calls were never detected. No single sampling approach provided a complete assessment of the bat fauna in the study area. In general, bats producing low intensity echolocation calls, such as phyllostomids, are more easily assessed by netting, and bats producing high intensity echolocation calls are better surveyed by bat detectors. The results demonstrate that a combined and varied approach to sampling is required for a complete assessment of the bat fauna of an area.

Morcegos da Chapada do Araripe, nordeste do Brasil

“…Os morcegos fitófagos foram os mais abundantes nesse levantamento, sobretudo nas áreas mais úmidas. A maior amostragem de morcegos fitófagos é esperada, considerando que Phyllostomidae é a família mais diversa da região Neotropical (Simmons, 2005), uma das mais abundantes e com maior sucesso de captura utilizando redes de neblina, possivelmente devido a sua ecolocação menos sensível e sua altura de forrageio mais baixa que o de morcegos insetívoros, (Portfors et al, 2000;Sampaio et al, 2003).…”

Morcegos (Mammalia, Chiroptera) em restinga no município de Jaguaruna, sul de Santa Catarina, Brasil

“…: Pedro et al, 1995;Portfors et al, 2000;Schulze et al, 2000;Falcão et al, 2003;Reis et al, 2006), sendo uma das espécies mais abundantes em regiões Neotropicais (Mello et al, 2008), o que é atribuído principalmente a sua grande plasticidade ecológica (Ortêncio Filho et al, 2005;Reis et al, 2006). Em restingas a espécie pode ser considerada comum já que a mesma foi registrada em 50% dos estudos desenvolvidos nesse ambiente (Oprea, 2006;Fogaça e Reis, 2008 (Fenton et al, 2002), o que não é a realidade das áreas amostradas.…”

Bat diversity of a Cerrado habitat in central Brazil

“…The majority of the published information on Brazilian bats is concentrated in the Atlantic Forest and other formations in the Southern part of the country (Trajano 1985;Peracchi and Albuquerque 1993;Pedro and Passos 1995;Reis and Muller 1995;Sipinski and Reis 1995;Reis et al 1996;Teixeira and Peracchi 1996;Portfors et al 2000;Reis et al 2000;Miretzki 2003;Bianconi et al 2004) and in Amazonia (Handley 1967;Pirlot 1972;Reis and Schubart 1979;Taddei and Reis 1980;Reis 1984;Marques 1985;Reis and Peracchi 1987;Taddei et al 1990;Bernard 2001;Bernard and Fenton 2002;Sampaio et al 2003).…”