Temporal Variation in Activity of Bats and the Design of Echolocation-Monitoring Studies

Hayes, John P.

doi:10.2307/1382902

Cited by 269 publications

(247 citation statements)

References 34 publications

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“…Influence of ambient temperature on foraging activity Ambient temperature and invertebrate activity are consistent predictors of bat activity (e.g., Anthony et al 1981;Audet 1990;Maier 1992;Rautenbach et al 1996;Hayes 1997). Minimum temperatures influence bats' physiologically, making activity uneconomic below certain thresholds.…”

Section: Comparison Between Lesser Short-tailed and Long-tailed Batsmentioning

confidence: 99%

“…Stratified sample transects were placed at two sites in the valley in a statistically robust randomised block design (Hayes 1997). The first site was at Knobs Flat in the central Eglinton Valley, and the second site at Plato Creek 12 km to the north.…”

Section: Sampling Designmentioning

confidence: 99%

“…Using automatic bat detector systems to compare habitat use between species of bats at a population level has several limitations (O'Donnell & Sedgeley 1994;Hayes 1997). The systems cannot differentiate number of bats at a site; multiple passes can represent either one or a number of bats passing the detector.…”

Section: Habitat Use By Lesser Short-tailed Batsmentioning

confidence: 99%

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Habitat use and nocturnal activity of lesser short‐tailed bats(Mystacina tuberculata)in comparison with long‐tailed bats(Chalinolobus tuberculatus)in temperate rainforest

O’Donnell¹,

Christie²,

Simpson³

2006

New Zealand Journal of Zoology

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Habitat use and nocturnal activity patterns of the threatened lesser short-tailed bat (Mystacina tuberculata) were sampled during late spring and early summer using automatic bat detector units in temperate beech (Nothofagus) rainforest in Fiordland, New Zealand. Detector units recorded the number of bats passing per hour as an index of activity. Habitat use patterns were compared with longtailed bats (Chalinolobus tuberculatus) sampled concurrently. Activity levels in lesser short-tailed bats varied significantly among five habitat types and amongst hours of the night. Of the total activity recorded, most passes (82.6% of n = 657 bat passes) were in red beech forest >200 m from the forest edge; 13.7% were in silver beech within 100 m of forest edges, 2.6% were along roads through forest, 0.9% were on the forest-grassland edge, and 0.2% were in the open grassland. Lesser short-tailed bats were active throughout the night but especially at dawn and dusk. There was no correlation between levels of activity by lesser short-tailed bats and overnight minimum or dusk temperatures. Patterns of habitat use and activity in long-tailed bats were significantly different from those of lesser short-tailed bats. Z06009; Online publication date 19 April 2006 Received 20 December 2005; accepted 3 April 2006Of the total activity recorded, most (56.0% of n = 2929 bat passes) was along forest-grassland edges; 15.7% of passes were in open grassland, 13.1% were along roads through forest, 11.0% were in silver beech forest within 100 m of forest edges, and 4.2% within red beech forest. The implications of these findings for conservation and for improving survey techniques are discussed. For example, lack of use of open and edge habitats by lesser short-tailed bats suggests they would not adapt to highly fragmented and cleared forest habitats. The two species of New Zealand bat used available habitats differently while inhabiting the same sites. Therefore, a range of habitats, including forest interior, forest edges and grasslands, are required to sustain both species within reserves and management areas. Surveys for lesser short-tailed bats should focus on mature forest stands >200 m into the forest to maximise the chance of encountering this species, whereas surveys for long-tailed bats would best focus on forest edges.

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Section: Comparison Between Lesser Short-tailed and Long-tailed Batsmentioning

confidence: 99%

Section: Sampling Designmentioning

confidence: 99%

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Habitat use and nocturnal activity of lesser short‐tailed bats(Mystacina tuberculata)in comparison with long‐tailed bats(Chalinolobus tuberculatus)in temperate rainforest

O’Donnell¹,

Christie²,

Simpson³

2006

New Zealand Journal of Zoology

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“…Unfortunately, past and current efforts to acoustically monitor bat activity prior to construction of turbines may suffer from flaws in study design, including small sample sizes and poor temporal and spatial replication (Hayes 1997(Hayes , 2000, pseudoreplication (Hurlbert 1984), and inappropriate inference because limitations and assumptions were not understood or clearly articulated (Hayes 2000, Sherwin et al 2000, Gannon et al 2003. Also, there is a lack of information and lack of agreement among stakeholders, biologists, and scientists regarding what constitute different levels of risk in relation to bat activity and potential fatality of bats at wind facilities.…”

Section: Introductionmentioning

confidence: 99%

Seasonal and Geographic Trends in Acoustic Detection of Tree-Roosting Bats

Johnson

Watrous

Giumarro

et al. 2011

Acta Chiropterologica

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We wish to thank the Massachusetts Technology Collaborative (MTC) and PPM Energy for funding this study, and the numerous donors to BCI, member companies of AWEA, and the National Fish and Wildlife Foundation, for additional support. Kristen Goland, formerly with MTC and now with PPM Energy, was instrumental in pulling support together for this study. We also thank PPM Energy employees Andy Linehan and Scott McDonald for their support and efforts. Jack Waggert assisted with installation of detector systems on meteorological towers and helped with many logistical aspects of the study. We thank members of the BWEC Scientific Advisory Committee and the technical advisory committee for their review of this report. 2 EXECUTIVE SUMMARYWe initiated a multi-year pre-and post-construction study in mid-summer 2006 to determine patterns of bat activity and evaluate the use of acoustic monitoring to predict mortality of bats at a proposed wind energy facility in northwest Massachusetts. The primary objectives of this study are to 1) determine level and patterns of activity of different species groups of bats using the proposed wind facility prior to and after construction of turbines; 2) correlate bat activity with weather and other environmental variables; and 3) combine results from this study with those from similar efforts to determine if indices of pre-construction bat activity can be used to predict post-construction bat fatalities at proposed wind facilities. Here we report results from the first year of pre-construction data collection.We recorded echolocation calls of bats with Anabat II zero-crossing ultrasonic detectors programmed to record calls from 1900 to 0700 hr each day of the study from 26 July to 20 December 2006. We used meteorological (met) towers to vertically array detectors for acoustic sampling during this study (one detector at 10, 31, and 39 m above ground level (AGL) at each tower). We recorded a total of 4,816 bat calls from all detectors at all met tower locations combined from 26 July through 11 November, an average of 8.9 calls per tower per night. No bat calls were recorded between 11 November and 20 December 2006. Bat activity generally was highest immediately after sunset and declined through the night until just before sunrise the following morning. High (>35 kHz, mostly Myotis species and red bats [Lasiurus borealis]) and low (<35 kHz, mostly hoary bats [Lasiurus cinereus] and big brown bats [Eptesicus fuscus])frequency-emitting echolocating bats tended to fly at different heights on the study area. We estimated that activity rates for bats using high frequencies were 1.5-4.0 times higher than those using low frequencies at low altitudes (10 m). This trend was reversed at medium altitudes (31 m) where it was estimated that activity rates for bats using low frequencies were 5.75-22.9 times greater than those for high frequency users, and at 39 m AGL it was estimated that activity rates for bats using low frequencies were 11.2-38.8 times greater than those for high frequency users.The best...

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“…However, bat detector-based research is useful for answering questions about a species' activity patterns and relative use of a particular habitat type (Hayes 1997), and has been used with success in New Zealand to identify how long-tailed bats use different patterns of edges and interiors of native forest (O'Donnell 2000a) and plantations (Moore 2001;Borkin & Parsons 2009). Monitoring of individual long-tailed bats using radio-telemetry is critical for studies focusing on habitat selection (Miller et al 2003).…”

Section: Long-tailed Bat Research In Plantation Forestmentioning

confidence: 99%

The importance of exotic plantation forest for the New Zealand long-tailed bat (Chalinolobus tuberculatus)

Borkin

Parsons

2010

New Zealand Journal of Zoology

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Environmental certification schemes have stimulated increasing interest in biodiversity and its management within exotic plantation forests. These schemes expect management to be scientifically-based, even though little is known about how often, or which, native species use exotic plantation forests. Greater knowledge of the ecology of native species within exotic plantation forests is required to advise management and reduce risks to native species, particularly those that are rare, such as the New Zealand long-tailed bat (Chalinolobus tuberculatus). Long-tailed bats use exotic plantation forests throughout New Zealand but need protection from the impacts of forest management, and particularly clear-fell harvest, that is achievable only through a better understanding of their biology. The consequences of the current reduced re-planting, and the conversion of plantation forests into pasture resulting in smaller forested areas, should not be ignored because they may be associated with reductions in longtailed bat populations. We review the current knowledge of long-tailed bats' use of exotic plantation forests, and report for the first time which exotic plantations long-tailed bats are known to use. We make recommendations for the design of monitoring programmes to detect long-tailed bats within plantation forests, and for research into the effects of forest management, especially logging, and comment on the likely impacts of reductions in forested areas on longtailed bats.

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Temporal Variation in Activity of Bats and the Design of Echolocation-Monitoring Studies

Cited by 269 publications

References 34 publications

Habitat use and nocturnal activity of lesser short‐tailed bats(Mystacina tuberculata)in comparison with long‐tailed bats(Chalinolobus tuberculatus)in temperate rainforest

Habitat use and nocturnal activity of lesser short‐tailed bats(Mystacina tuberculata)in comparison with long‐tailed bats(Chalinolobus tuberculatus)in temperate rainforest

Seasonal and Geographic Trends in Acoustic Detection of Tree-Roosting Bats

The importance of exotic plantation forest for the New Zealand long-tailed bat (Chalinolobus tuberculatus)

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