Morphology, Echolocation and Resource Partitioning in Insectivorous Bats

Aldridge, H. D. J. N.; Rautenbach, I. L.

doi:10.2307/4947

Cited by 487 publications

(389 citation statements)

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“…Despite these limitations, the present study confirms earlier reports that suggest lesser short-tailed bats focus their activity in forest interiors (Daniel 1979;Daniel & Williams 1984;Lloyd 2005). Speed, manoeuvrability, wing morphology, and echolocation call structure influence where bats can forage effectively (e.g., Aldridge & Rautenbach 1987;Swartz et al 2003;Jones & Teeling 2006). Lesser short-tailed bats in the Eglinton Valley have a wing loading and aspect ratio lower than average for their size (Jones et al 2003).…”

Section: Habitat Use By Lesser Short-tailed Batsmentioning

confidence: 99%

“…However, some elements of bat faunas typical of forests appear to be missing in New Zealand. These include bats that specialise in foraging in the mid-to-upper strata within the forest (e.g., Chalinolobus morio in Australia; O'Neill & Taylor 1986;Fullard et al 1991), bats with low wing loadings and aspect ratios that often forage in densely cluttered habitats (e.g., many members of the Rhinolophidae, Hipposideridae, andNycteridae; Aldridge & Rautenbach 1987;Jones et al 1993), species that feed very close to surface foliage (e.g., Nyctophilus geoffroyi, Lumsden et al 1994), and open zone specialists which have very long, narrow wings, and high wing loadings and aspect ratios (e.g., Molossidae and Emballonuridae; Aldridge & Rautenbach 1987). Most forest bat faunas support not just one, but a number of species that live in gaps and open spaces (e.g., O'Neill & Taylor 1986;Lumsden et al 1994).…”

Section: Comparison Between Lesser Short-tailed and Long-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: Habitat Use By Lesser Short-tailed Batsmentioning

confidence: 99%

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

confidence: 99%

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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“…A variety of factors have been shown to influence call structure, including geographical variation, foraging habitat and foraging mode (Aldridge and Rautenbach, 1987;Norberg and Rayner, 1987;Thomas et al ., 1987;Fenton, 1990;Barclay and Brigham, 1991;Obrist, 1995;Barclay et al ., 1999). This means that reference calls recorded in a particular region, or in a particular habitat type, may not be applicable to other regions, or to other habitat types.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Identification of Eight Species of Bat (Mammalia: Chiroptera) Inhabiting Forests of Southern Hokkaido, Japan: Potential for Conservation Monitoring

2004

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-Assessing the impact of forest management on bat communities requires a reliable method for measuring patterns of habitat use by individual species. A measure of activity can be obtained by monitoring echolocation calls, but identification of species is not always straightforward. We assess the feasibility of using analysis of time-expanded echolocation calls to identify free-flying bats in the Tomakomai Experimental Forest of Hokkaido University, Hokkaido, northern Japan. Echolocation calls of eight bat species were recorded in one or more of three conditions: from hand-released individuals, from bats flying in a confined space and from bats emerging from their roost. Sonograms of 171 calls from 8 bat species were analyzed. These calls could be categorized into 3 types according to their structure: FM/CF/FM type ( Rhinolophus ferrumequinum ), FM types ( Murina leucogaster, Murina ussuriensis, Myotis macrodactylus and Myotis ikonnikovi ) and FM/QCF types ( Eptesicus nilssonii, Vespertilio superans and Nyctalus aviator ).Sonograms of the calls of R. ferrumequinum could easily be distinguished from those of all other species by eye. For the remaining calls, seven parameters (measures of frequency, duration and inter-call interval) were examined using discriminant function analysis, and 92% of calls were correctly classified to species. For each species, at least 80% of calls were correctly classified. We conclude that analysis of echolocation calls is a viable method for distinguishing between species of bats in the Tomakomai Experimental Forest, and that this approach could be applied to examine species differences in patterns of habitat-use within the forest.

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“…Most of the recorded Myotis species are known to take their prey mainly (Natterer's and Bechstein's bat) or at least partly (Whiskered and Brandt's bat) by gleaning from vegetation (Dietz et al, 2007 and references therein). Bats using this foraging strategy are more adapted to highclutter environments such as forests (e.g., in regards to their echolocation), but not to open landscape habitats (Aldridge and Rautenbach, 1987). Exceptions are the greater mouseeared bat which almost exclusively feeds on carabid beetles and Daubenton's bat, a species adapted to take prey from water surfaces (Dietz et al, 2007 and references therein).…”

Section: Bat Activitymentioning

confidence: 99%

Nocturnal Risks-High Bat Activity in the Agricultural Landscape Indicates Potential Pesticide Exposure

Stahlschmidt

Hahn

Brühl

2017

Front. Environ. Sci.

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Although agriculture dominates much of Europe's landscape, there is virtually no information on foraging activity of bats in different crops. Additionally little is known about pesticide exposure of bats and related effects and there are currently no specific regulatory requirements to include bats in European Union pesticide risk assessments for the registration of these chemicals although other mammals are considered. To evaluate the potential pesticide exposure of bats, we studied bat diversity and activity as well as the availability of aerial prey insects in different crops and semi-natural habitats in south-western Germany in a landscape dominated by agriculture. In 300 accumulated sampling nights more than 24,000 bat call sequences were acoustically recorded and, in parallel, almost 110,000 insects of suitable prey sizes were sampled by light traps. A total of 14 bat species were recorded, among them the locally rare and for Germany critically endangered northern bat (Eptesicus nilssonii) and the barbastelle (Barbastella barbastellum), all of them also occurring over agricultural fields. In comparison to agricultural habitats, higher activity levels in forest sites were only found for Myotis species but not for species of the genera Pipistrellus, Eptesicus and Nyctalus. There were no significant differences in the availability of aerial nocturnal insects between forest, meadow and agricultural habitats. Comparing the different agricultural crops, significantly fewer bat call sequences and lower numbers of nocturnal insects were collected above the vineyards compared to orchards, cereal and vegetable fields. Highest activity levels of all bat species were recorded above agricultural fields situated next to forests. Given the high bat activity levels recorded at several agricultural sites, among them orchard and vegetable fields both known for their high pesticide inputs, and the availability of suitable prey insects, we conclude that pesticide exposure via ingestion of contaminated insect prey is possible. This potential risk is currently not considered in the European pesticide risk assessment scheme.

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Morphology, Echolocation and Resource Partitioning in Insectivorous Bats

Cited by 487 publications

References 20 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

Acoustic Identification of Eight Species of Bat (Mammalia: Chiroptera) Inhabiting Forests of Southern Hokkaido, Japan: Potential for Conservation Monitoring

Nocturnal Risks-High Bat Activity in the Agricultural Landscape Indicates Potential Pesticide Exposure

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