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13 results for “Eptesicus fuscus”
Figure 5. a in Systematics, morphometry, and distribution of Eptesicus fuscus miradorensis (H. Allen, 1866) (Chiroptera: Vespertilionidae), with notes on baculum morphology and natural history
Figure 5. a. Suitability map of Eptesicus miradorensis in America using the Maxent algorithm. The higher suitability values are present in México,Guatemala,north Colombia, and Venezuela. b. Binary distribution map of Eptesicus miradorensis using the 10-percentile threshold value. Red points represent the species records.
Figure 1. a in Systematics, morphometry, and distribution of Eptesicus fuscus miradorensis (H. Allen, 1866) (Chiroptera: Vespertilionidae), with notes on baculum morphology and natural history
Figure 1. a. Map of the distribution of the currently recognized subspecies of Eptesicus fuscus. b. Bayesian gene trees of Cyt-b and COI of the E. fuscus complex. Upper values of branches show the posterior probability of the Bayesian inference. Values below the branches indicate the maximum likelihood inference's nonparametric (SH-aLRT) and ultrafast (UFBoot) bootstrap values.Country abbreviations. COL:Colombia,CAN:Canada,DOM: Dominican Republic, GUA:Guatemala, PAN: Panama, USA: United States,VEN:Venezuela.
Figure 2 in Systematics, morphometry, and distribution of Eptesicus fuscus miradorensis (H. Allen, 1866) (Chiroptera: Vespertilionidae), with notes on baculum morphology and natural history
Figure 2. Details of the skull (ICN 17189; female from Department of Santander, Colombia) of E. miradorensis. a. Ventral view. b. Dorsal view. c. Lateral view. d. Alive specimen from Serranía del Perijá, Colombia (ICN uncatalogued) shows long brownish hair and a dark, naked face.
Hibernating female big brown bats (Eptesicus fuscus) adjust huddling and drinking behaviour, but not arousal frequency, in response to low humidity
<p>Many mammals hibernate during winter, reducing energy expenditure via bouts of torpor. The majority of a hibernator's energy reserves are used to fuel brief, but costly, arousals from torpor. Although arousals likely serve multiple functions, an important one is to restore water stores depleted during torpor. Many hibernating bat species require high humidity, presumably to reduce torpid water loss, but big brown bats (<em>Eptesicus fuscus</em>) appear tolerant of a wide humidity range. We tested the hypothesis that hibernating female <em>E. fuscus </em>use behavioural flexibility during torpor and arousals to maintain water balance and reduce energy expenditure. We predicted: (1) <em>E. fuscus </em>hibernating in dry conditions would exhibit more compact huddles during torpor and drink more frequently than bats in high humidity conditions; and (2) frequency and duration of torpor bouts and arousals, and thus, total loss of body mass would not differ between bats in both environments. We housed hibernating <em>E. fuscus</em> in temperature- and humidity-controlled incubators at 50% or 98% relative humidity (8°C, 110 days). Bats in the dry environment maintained a more compact huddle during torpor and drank more frequently during arousals. Bats in both environments<em> </em>had a similar number of arousals, but arousal duration was shorter in the dry environment. However, total loss of body mass over hibernation did not differ between treatments indicating that both groups used similar amounts of energy. Our results suggest that behavioural flexibility allows hibernating <em>E. fuscus</em> to maintain water balance and reduce energy costs across a wide range of hibernation humidities.</p>
Big brown bat (Eptesicus fuscus) capture records before and after white-nose syndrome
<p>We collated 30 years of big brown bat capture records collected between 1990 to 2020. We collected data from wildlife agencies and researchers in the eastern US. We kept capture records that fell within the months of March through October, representing spring through fall months when bats are surveyed outside of hibernacula. We then paired this data with spatiotemporal spread of the fungal pathogen <em>Pseudogymnoascus destructans</em> (causal agent of white-nose syndrome that kills North American temperate bats), of which, big brown bats are susceptible to infection. The completed dataset represents 30,497 individual big brown bat captures across 3,797 unique sites.</p>
Big brown bat (Eptesicus fuscus) capture records before and after white-nose syndrome
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Hibernating female big brown bats (Eptesicus fuscus) adjust huddling and drinking behaviour, but not arousal frequency, in response to low humidity
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Data from: An inordinate fondness for beetles? Variation in seasonal dietary preferences of night roosting big brown bats (Eptesicus fuscus)
Generalist species with numerous food web interactions are thought to provide stability to ecosystem dynamics; however, it is not always clear whether habitat generality translates into dietary diversity. Big brown bats are common across North America and employ a flexible foraging strategy over water, dense forests, forest edges and rural and urban settings. Despite this generalist use of habitat, they are paradoxically characterized as beetle specialists. However, hard carapaces may preferentially survive digestion leading to over-representation during morphological analysis of diet. This specialization has not been evaluated independently using molecular analysis and species-level identification of prey. We used next-generation sequencing to assess the diet of big brown bats. Beetles were consumed in the highest frequency but Lepidoptera species richness was highest among identified prey. The consumption of species showed strong seasonal and annual variation. While Coleoptera consumption varied, Lepidoptera and Ephemeroptera were relatively constant dietary components. Dietary diversity increased in late summer when insect diversity decreases. Our results indicate that big brown bats are dietary generalists and, while beetles are an important component of the diet, Lepidoptera are equally important, and Lepidoptera and Ephemeroptera are the only stable prey resource exploited. As resources become limited, big brown bats may respond by increasing the species richness of prey and thus their connectedness in the ecosystem. This characterization of diet corresponds well with a generalist approach to foraging, making them an important species in encouraging and maintaining ecosystem stability.
On following pages: 174. Small Big-eared Brown Bat (Histiotus montanus);, 175. Thomas's Big-eared Brown Bat (Histiotus laephotis); 176. Common Big-eared Brown Bat (Histiotus macrotus); 177. Southern Big-eared Brown Bat (Histiotus magellanicus); 178. Big Brown Bat (Eptesicus fuscus); 179. Guadeloupe Serotine (Eptesicus guadeloupensis); 180. Diminutive Serotine (Eptesicus diminutus); 181. Little Black Serotine (Eptesicus andinus); 182. Chiriguinan Serotine (Eptesicus chiriquinus); 183. Argentine Serotine (Eptesicus furinalis); 184. Harmless Serotine (Eptesicus innoxius); 185. Brazilian Serotine (Eptesicus brasiliensis); 186. Taddei's Serotine (Eptesicus taddeii); 187. Ulapes Serotine (Eptesicus ulapesensis); 188. Horn-skinned Serotine (Eptesicus floweri); 189. Lagos Serotine (Eptesicus platyops); 190. Long-tailed Serotine (Eptesicus hottentotus); 191. Ognev's Serotine (Eptesicus ognevi); 192. Anatolian Serotine (Eptesicus anatolicus); 193. Botta's Serotine (Eptesicus bottae); 194. Meridional Serotine (Eptesicus isabellinus); 195. Oriental Serotine (Eptesicus pachyomus); 196. Eurasian Serotine (Eptesicus serotinus); 197. Northern Serotine (Eptesicus nilssonil); 198. Sombre Serotine (Eptesicus tate); 199. Gobi Serotine (Eptesicus gobiensis), 200. Japanese Serotine (Eptesicus japonensis);, 201. Thick-eared Serotine (Eptesicus pachyotis). in Vespertilionidae
On following pages: 174. Small Big-eared Brown Bat (Histiotus montanus);, 175. Thomas's Big-eared Brown Bat (Histiotus laephotis); 176. Common Big-eared Brown Bat (Histiotus macrotus); 177. Southern Big-eared Brown Bat (Histiotus magellanicus); 178. Big Brown Bat (Eptesicus fuscus); 179. Guadeloupe Serotine (Eptesicus guadeloupensis); 180. Diminutive Serotine (Eptesicus diminutus); 181. Little Black Serotine (Eptesicus andinus); 182. Chiriguinan Serotine (Eptesicus chiriquinus); 183. Argentine Serotine (Eptesicus furinalis); 184. Harmless Serotine (Eptesicus innoxius); 185. Brazilian Serotine (Eptesicus brasiliensis); 186. Taddei's Serotine (Eptesicus taddeii); 187. Ulapes Serotine (Eptesicus ulapesensis); 188. Horn-skinned Serotine (Eptesicus floweri); 189. Lagos Serotine (Eptesicus platyops); 190. Long-tailed Serotine (Eptesicus hottentotus); 191. Ognev's Serotine (Eptesicus ognevi); 192. Anatolian Serotine (Eptesicus anatolicus); 193. Botta's Serotine (Eptesicus bottae); 194. Meridional Serotine (Eptesicus isabellinus); 195. Oriental Serotine (Eptesicus pachyomus); 196. Eurasian Serotine (Eptesicus serotinus); 197. Northern Serotine (Eptesicus nilssonil); 198. Sombre Serotine (Eptesicus tate); 199. Gobi Serotine (Eptesicus gobiensis), 200. Japanese Serotine (Eptesicus japonensis);, 201. Thick-eared Serotine (Eptesicus pachyotis).
Data from: An inordinate fondness for beetles? Variation in seasonal dietary preferences of night roosting big brown bats (Eptesicus fuscus)
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Figure 4 in Systematics, morphometry, and distribution of Eptesicus fuscus miradorensis (H. Allen, 1866) (Chiroptera: Vespertilionidae), with notes on baculum morphology and natural history
Figure 4. PCA plots of (a) cranial and (b) external measurements of Eptesicus miradorensis from different localities along its distribution range.
Figure 3 in Systematics, morphometry, and distribution of Eptesicus fuscus miradorensis (H. Allen, 1866) (Chiroptera: Vespertilionidae), with notes on baculum morphology and natural history
Figure 3. Details of the skeleton (a-b) and baculum (c-e) of Eptesicus miradorensis (QM JM 6365) from México. a. Dorsal view. b. Ventral view. c. Baculum shape and position (green) embedded in the penis (grey structure). d: Dorsal view of the baculum. e.Ventral view of the baculum.
Resistance to age-related hearing loss in the echolocating big brown bat (Eptesicus fuscus)
GEO Series GSE274777. Rattus norvegicus; Eptesicus fuscus; Homo sapiens; Mus musculus. 23 samples. Type: Methylation profiling by array.
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