Winter activity of \u3ci\u3eMyotis septentrionalis\u3c/i\u3e: Role of temperature in controlling emergence from a hibernaculum

We acoustically monitored a small mine in southeastern Nebraska known to be a hibernaculum for the Northern Long-eared Myotis (Myotis septentrionalis) for two winters (2014-2015 and 2015-2016). Some M. septentrionalis emerged on nights with mild temperatures throughout both winters. There was an 89% probability of detecting this species when temperature at sunset was \u3e5°C. Our results indicated that acoustical surveys outside mines or caves in winter, particularly on nights with mild temperatures, are an effective method of identifying hibernacula of M. septentrionalis and potentially other species without disturbing individuals by entering the hibernaculum or by netting individuals as they exit their winter quarters. However, the effectiveness of acoustical surveys is impacted by the certainty of identification of calls to species

Habitat selection by the Northern Long-eared Myotis (\u3ci\u3eMyotis septentrionalis\u3c/i\u3e) in the Midwestern United States: Life in a shredded farmscape

Populations of the Northern Long-Eared Myotis (Myotis septentrionalis) have declined dramatically in recent years in eastern North America due to white-nose syndrome. Although M. septentrionalis was once common in parts of eastern North America, few studies have examined habitat selection of this species in an agricultural landscape. We used acoustical methods to quantify bat activity and construct a habitat model of M. septentrionalis in an intensively farmed area in the Midwestern United States, where mortality from white-nose syndrome has not yet been observed. Our study confirms that M. septentrionalis prefers forest and avoids open habitats in this agricultural region. The best landscape variable for predicting activity in woodland sites was the proportion of forest coverage within a radius of 2000 meters. Our analysis indicates that bat activity increased exponentially as forest coverage increased. There is no evidence that M. septentrionalis preferred open areas at the edge of forest (within 5 m of forest edge), or that once in the woods, the distance to the forest edge had any impact on activity

Habitat selection by the Northern Long-eared Myotis (\u3ci\u3eMyotis septentrionalis\u3c/i\u3e) in the Midwestern United States: Life in a shredded farmscape

Populations of the Northern Long-Eared Myotis (Myotis septentrionalis) have declined dramatically in recent years in eastern North America due to white-nose syndrome. Although M. septentrionalis was once common in parts of eastern North America, few studies have examined habitat selection of this species in an agricultural landscape. We used acoustical methods to quantify bat activity and construct a habitat model of M. septentrionalis in an intensively farmed area in the Midwestern United States, where mortality from white-nose syndrome has not yet been observed. Our study confirms that M. septentrionalis prefers forest and avoids open habitats in this agricultural region. The best landscape variable for predicting activity in woodland sites was the proportion of forest coverage within a radius of 2000 meters. Our analysis indicates that bat activity increased exponentially as forest coverage increased. There is no evidence that M. septentrionalis preferred open areas at the edge of forest (within 5 m of forest edge), or that once in the woods, the distance to the forest edge had any impact on activity

Winter activity of \u3ci\u3eMyotis septentrionalis\u3c/i\u3e: Role of temperature in controlling emergence from a hibernaculum

We acoustically monitored a small mine in southeastern Nebraska known to be a hibernaculum for the Northern Long-eared Myotis (Myotis septentrionalis) for two winters (2014-2015 and 2015-2016). Some M. septentrionalis emerged on nights with mild temperatures throughout both winters. There was an 89% probability of detecting this species when temperature at sunset was \u3e5°C. Our results indicated that acoustical surveys outside mines or caves in winter, particularly on nights with mild temperatures, are an effective method of identifying hibernacula of M. septentrionalis and potentially other species without disturbing individuals by entering the hibernaculum or by netting individuals as they exit their winter quarters. However, the effectiveness of acoustical surveys is impacted by the certainty of identification of calls to species

Acoustic evidence of bats using rock crevices in winter: A call for more research on winter roosts in North America

The Northern Long-eared Myotis (Myotis septentrionalis) is known to hibernate in mines and caves, often using cracks within these hibernacula as roost sites. We hypothesized that M. septentrionalis might use deep cracks in rock outcrops for hibernation as well. To test this hypothesis, we placed acoustical bat detectors near rock outcrops away from any known mines or caves during winter in Nebraska. We documented calls of M. septentrionalis as well as Perimyotis subflavus and Eptesicus fuscus in December near rock outcrops, which suggests that individuals of all three species were hibernating in rock crevices in winter. Of the 34 sites we monitored, we identified the calls of M. septentrionalis at two sites (about 250 km apart). The dominant rocks at both sites were limestone and shale with large, deep cracks. Given the recent listing of this species as threatened by the US Fish and Wildlife Service, it is important to understand the possible role of cracks in rock outcrops as alternative hibernacula

Acoustic Detection Reveals Fine-Scale Distributions of Myotis lucifugus, Myotis septentrionalis, and Perimyotis subflavus in Eastern Nebraska

Before white-nose syndrome arrives in Nebraska, it is important to document the preexposure distributions of cave bats in the state. We examined the distributions of Myotis lucifugus (little brown myotis), Myotis septentrionalis (northern long-eared myotis), and Perimyotis subflavus (tri-colored bat) in eastern Nebraska by setting acoustic detectors for a single night at 105 sites in wooded habitats during summers of 2012 and 2014. We compared 2 methods of determining presence at each site. Results of our analyses are fine-scale distributional maps for these bats and some range extensions from published records. Results for M. septentrionalis and P. subflavus are largely consistent with previous reports. Results for M. lucifugus vary depending on the method of determining presence; however, our preferred method creates a pattern consistent with the known vouchered distribution of this species. The differences between published distributions of these species and distributions based on acoustic detection from our study might result from a lack of extensive netting in many areas of eastern Nebraska, underrepresentation of P. subflavus from mist net surveys in Nebraska, and a recent westward range expansion of P. subflavus and M. septentrionalis in southern Nebraska

Acoustic evidence of bats using rock crevices in winter: A call for more research on winter roosts in North America

The Northern Long-eared Myotis (Myotis septentrionalis) is known to hibernate in mines and caves, often using cracks within these hibernacula as roost sites. We hypothesized that M. septentrionalis might use deep cracks in rock outcrops for hibernation as well. To test this hypothesis, we placed acoustical bat detectors near rock outcrops away from any known mines or caves during winter in Nebraska. We documented calls of M. septentrionalis as well as Perimyotis subflavus and Eptesicus fuscus in December near rock outcrops, which suggests that individuals of all three species were hibernating in rock crevices in winter. Of the 34 sites we monitored, we identified the calls of M. septentrionalis at two sites (about 250 km apart). The dominant rocks at both sites were limestone and shale with large, deep cracks. Given the recent listing of this species as threatened by the US Fish and Wildlife Service, it is important to understand the possible role of cracks in rock outcrops as alternative hibernacula

A catalog of Nearby Poor Clusters of Galaxies

A catalog of 732 optically selected, nearby poor clusters of galaxies covering the entire sky north of $\rm -3^{\circ}$ declination is presented. The poor clusters, called WBL clusters, were identified as concentrations of 3 or more galaxies with photographic magnitudes brighter than 15.7, possessing a galaxy surface overdensity of $10^{4/3}$. These criteria are consistent with those used in the identification of the original Yerkes poor clusters, and this new catalog substantially increases the sample size of such objects. These poor clusters cover the entire range of galaxy associations up to and including Abell clusters, systematically including poor and rich galaxy systems spanning over three orders of magnitude in the cluster mass function. As a result, this new catalog contains a greater diversity of richness and structures than other group catalogs, such as the Hickson or Yerkes catalogs. The information on individual galaxies includes redshifts and cross-references to other galaxy catalogs. The entries for the clusters include redshift (where available) and cross-references to other group and cluster catalogs.Comment: 27 pages, 7 figures, + one 20-page landscape table, accepted for publication in A