02266nas a2200253 4500008004100000245012500041210006900166300001200235490000600247520140300253653002001656653001101676653002401687653002301711653001501734653002001749653001401769653002501783653001401808100001701822700002701839700002201866856012401888 2000 eng d00aContribution of acoustic methods to the study of insectivorous bat diversity in protected areas from northern Venezuela 0 aContribution of acoustic methods to the study of insectivorous b a171-1830 v23 aWe present the results of an acoustic survey of aerial insectivorous bats conducted in four protected areas in
northern Venezuela. These areas represent localities where the taxonomic composition of the bat communities
was relatively well known. We conducted field surveys using the Anabat II detector and analysis system. We
compared acoustic inventories with previous lists obtained with conventional sampling methods (principally
mist nets). We identified 30 species acoustically (representing 15 genera of the families Emballonuridae,
Noctilionidae, Mormoopidae, Vespertilionidae, and Molossidae) on the basis of vocal signatures. Nineteen of
these were verified by capture and subsequent recording of released animals; the remainder were identified by
comparison with verified vocalizations from other localities. An additional 11 unidentified but distinct taxa
were recorded and are referred to here as 'sonotypes' (based on similarities in call structure to known species)
representing eight genera of the families Emballonuridae, Vespertilionidae, and Molossidae. The short-term
acoustic surveys nearly equaled or exceeded the known species richness at three ofthe four localities, and added
two to nine species to previous lists from all locations; many of these bats correspond to taxa difficult to detect
with conventional capture methods.10aacoustic survey10aAnabat10acommunity inventory10ainsectivorous bats10aNeotropics10aprotected areas10asonotypes10atechnique comparison10aVenezuela1 aOchoa, José1 aO'Farrell, Michael, J.1 aMiller, Bruce, W. uhttps://bio.acousti.ca/content/contribution-acoustic-methods-study-insectivorous-bat-diversity-protected-areas-northern01643nas a2200229 4500008004100000245011800041210006900159300001100228490000600239520086300245653002801108653002401136653000701160653001101167653001301178653001501191653001701206653002301223653002201246100002201268856012301290 2001 eng d00aA method for determining relative activity of free flying bats using a new activity index for acoustic monitoring0 amethod for determining relative activity of free flying bats usi a93-1050 v33 a

A new activity index for acoustical bat data is presented. The AI acoustical activity index) was highly correlated to bat passes but proved to be a less biased index of activity. The method dispenses with the need to define, identify and count bat passes and provides a simple means to quantify activity. This method uses the Anabat system where acoustic surveys are carried out in real time with the data saved directly to a computer hard drive, taking advantage of the date-time information encoded into each file. The method is based upon the presence absence of a species occurrence during one-minute time intervals and avoids inflating an index of activity that may reflect the behavior of the species sampled. Examples are given showing that the AI is an effective measure of bat activity allowing comparisons between sites, times and species.

10aacoustic activity index10aacoustic monitoring10aAI10aAnabat10abat pass10aChiroptera10aecholocation10arelative abundance10arelative activity1 aMiller, Bruce, W. uhttps://bio.acousti.ca/content/method-determining-relative-activity-free-flying-bats-using-new-activity-index-acoustic