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Showing 1 to 20 of 370 for “"Bat"”.
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Target strength of bat prey in relation to pulse frequency and vegetation density in bat species, Rhinolophus fumigatus (Rüppell's horseshoe bat)
… morphology is evident in several insectivorous bat species where a negative correlation between peak echolocation frequency and body size is observed. However, there are various exceptions to the general allometric relationship observed between body size and echolocation pulse frequency of both …
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Spatial Audio for Bat Biosonar
… the behavioral and physiological responses of bats to echoes typically includes analysis of acoustic signals from microphones and/or microphone arrays, using time difference of arrival (TDOA) between array elements or the microphones to locate flying bats (azimuth and elevation). This has …
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Activities Within a Myotine Bat Community With Emphasis on the Endangered Indiana Bat, Myotis Sodalis
The steady decline of the endangered Indiana bat (Myotis sodalis) and its interactions with other congeners are not adequately understood. A study area in northeast Missouri was identified during a survey in 2000 and found to host one of the largest M. sodalis maternity populations ever found, as …
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Northern long-eared bat day roost ecology and novel bat sampling techniques in the mid-Atlantic
… destructans, has caused precipitous declines in bat populations including the now endangered northern long-eared bat (Myotis septentrionalis; NLEB). Remnant populations of NLEB have been found outside their traditional range in areas of the urbanized Piedmont and also the Coastal Plain of the …
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"Bat Boy: The Musical" Scene Design
… The end of act two, when the towns people and Bat Boy are at the mouth of the cave, is also at night, or dusk.</p> <p>3. Economic Environment: Money, class level, state of wealth or poverty. What does economics mean to the characters? If you don't think economics matters to the characters, …
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Thermoregulation in the Bat, Eptesicus Fuscus
Made available in DSpace on 2014-12-12T01:27:29Z (GMT). No. of bitstreams: 1 7114831.pdf: 3738092 bytes, checksum: 5c02991ac74111122bf9c2cbf2527316 (MD5) Previous issue date: 1970
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Bat Skull Evolution: the Impact of Echolocation
… factors. Skulls of echolocating species, such as bats, also face the challenge of optimizing sound emission and propagation. A strong association between bat skull morphology and feeding behaviour has been suggested previously (in particular for the Phyllostomidae family). Morphological variation …
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Microbial Ecology of a Bat Guano Community
Guano from the Gray Bat, Myotis griscescens, represents a major nutrient input into cave systems of Southern Missouri. It forms the base of a dynamic community of microflora and microfauna in a controlled environment. The guano community is found in what normally would be considered a nutrient …
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A Dietary Analysis on Panamanian Bat Species
<p>Bats are found all over the world, and they are the most diverse group of mammals in the tropics. They are a key component in all ecosystems as predators, pollinators, or seed dispersers. As a conservation tool, dietary studies show what different bat species need to survive. Through …
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Availability of Organochlorides and Accumulation in Populations of Tadarida brasiliensis (Free-Tailed Bat) and Eptesicus fuscus (Big Brown Bat)
… late 1980's. The effects of organochlorides on bats such as Tadarida brasiliensis and Eptesicus fuscus have been intensively studied. The effects can range from problems with reproduction to mortality. My analysis of populations of T. brasiliensis and E. fuscus showed that organochlorides are …
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Day-roosting Social Ecology of the Northern Long-eared Bat (Myotis septentrionalis) and the Endangered Indiana Bat (Myotis sodalis)
Day-roost use by northern long-eared bat (Myotis septentrionalis) maternity colonies on the Fort Knox military reservation, Kentucky, USA, resulted in formation of non-random networks of roosts that exhibited a trend toward centralization. Centralization of day-roost networks was reflected in the …
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Sonar Jamming in the Bat-Moth Arms Race
Bats and moths are an example of a diffuse evolutionary arms race - a situation where groups of prey and predator species evolve increasingly sophisticated means to out-compete the other. Chapter one provides an overview of this arms race. Bats capture night-flying insects using highly …
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Analysis of Bat Biosonar Beampatterns: Biodiversity and Dynamics
Across species, bats exhibit wildly disparate differences in their noseleaf and pinnae shapes. Within Rhinolophid and Hipposiderid families, bats actively deform their pinnae and noseleaf during biosonar operation. Both the pinnae and noseleaf act as acoustic baffles which interact with the …
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Bat activity over wetlands: temporal and spatial variation
… well as spatially. For temperate insectivorous bats, wetlands are important forage habitats because they provide water and high abundances of insects. My overall objective was to identify abiotic and biotic factors that influence bat foraging activity over wetlands in the channeled scablands of …
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Microclimate modeling of bat habitat in abandoned mines
Includes bibliographical references (page 61).
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Spillover and emergence of bat-origin viral infections
… quantify and characterise the system dynamics of bat-origin viral emergence events. Chapters 2–5 are comprised of four quantitative analyses: a compartmental model comparison of stochastic henipavirus serological dynamics in captive bats (Eidolon helvum in Ghana), a quantitative literature review …
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A Numerical Elastic Model for Deforming Bat Pinnae
In bats, the directivity patterns for reception are shaped by the surface geometry of the pinnae. Since many bat species are capable of large ear deformations, these beampatterns can be time-variant. To investigate this time-variance using numerical methods, a digital model that is capable of …
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Dynamic Emission Baffle Inspired by Horseshoe Bat Noseleaves
The evolution of bats is characterized by a combination of two key innovations - powered flight and biosonar - that are unique among mammals. Bats still outperform engineered systems in both capabilities by a large margin. Bat biosonar stands out for its ability to encode and extract sensory …
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