Roost Selection and Seasonal Activity of a Remnant Population of Northern Myotis (Myotis Septentrionalis) in Pennsylvania PDF Download
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Author: Mattea A. Lewis
Publisher:
ISBN:
Category : Animal populations
Languages : en
Pages : 84
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Book Description
The decline in northern myotis (Myotis septentrionalis) populations since the arrival of white-nose syndrome (WNS) in eastern North America has led to the species receiving protected status in the United States and Canada. Much of the research on habitat use of this species has occurred during the summer maternity season while similar examinations of autumn and winter habits are scarce. The goal of my thesis was to describe the seasonal presence and habitat use of a remnant colony of northern myotis in central Pennsylvania. From 2017–2020, I radio-tagged 27 northern myotis and used acoustic bat detectors at 5 locations to study roost habitat choice and seasonal changes in activity. Radio-tagged northern myotis never left the study area and were tracked to day roosts until early November. Counts of bats exiting roost trees revealed that maternity roosts were as frequently used during autumn (August 15–October 31) as during summer (21 June–August 14). Similarly, 78% of roost trees located during autumn were used during the summer as well. Using model selection and multinomial logistic regression models, I found that tree decay stage, basal area of the forest stand, and distance to water best described the variance in male roosts, female roosts, and randomly sampled trees. Both male and female northern myotis preferred to roost in dead and declining trees. Females also preferred to roost in dense forest stands and in trees located close to water. During October and November, one radio-tagged female and one male northern myotis were tracked to a ground-level rock crevice. Acoustic activity recorded between February and October at this location differed from trends in activity at other sampling locations and had a peak of activity in late summer when northern myotis are known to swarm. Northern myotis calls were recorded at this roost between March and October and bats were observed emerging from this roost during spring and autumn but not summer. These data support the growing evidence that northern myotis hibernate outside of caves and show that bats in central Pennsylvania roost in maternity trees until at least late October.
Author: Mattea A. Lewis
Publisher:
ISBN:
Category : Animal populations
Languages : en
Pages : 84
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Book Description
The decline in northern myotis (Myotis septentrionalis) populations since the arrival of white-nose syndrome (WNS) in eastern North America has led to the species receiving protected status in the United States and Canada. Much of the research on habitat use of this species has occurred during the summer maternity season while similar examinations of autumn and winter habits are scarce. The goal of my thesis was to describe the seasonal presence and habitat use of a remnant colony of northern myotis in central Pennsylvania. From 2017–2020, I radio-tagged 27 northern myotis and used acoustic bat detectors at 5 locations to study roost habitat choice and seasonal changes in activity. Radio-tagged northern myotis never left the study area and were tracked to day roosts until early November. Counts of bats exiting roost trees revealed that maternity roosts were as frequently used during autumn (August 15–October 31) as during summer (21 June–August 14). Similarly, 78% of roost trees located during autumn were used during the summer as well. Using model selection and multinomial logistic regression models, I found that tree decay stage, basal area of the forest stand, and distance to water best described the variance in male roosts, female roosts, and randomly sampled trees. Both male and female northern myotis preferred to roost in dead and declining trees. Females also preferred to roost in dense forest stands and in trees located close to water. During October and November, one radio-tagged female and one male northern myotis were tracked to a ground-level rock crevice. Acoustic activity recorded between February and October at this location differed from trends in activity at other sampling locations and had a peak of activity in late summer when northern myotis are known to swarm. Northern myotis calls were recorded at this roost between March and October and bats were observed emerging from this roost during spring and autumn but not summer. These data support the growing evidence that northern myotis hibernate outside of caves and show that bats in central Pennsylvania roost in maternity trees until at least late October.
Author: Patricia Ormsbee
Publisher:
ISBN:
Category : Myotis
Languages : en
Pages : 126
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Book Description
Measuring habitat selection by bats is complicated by their intricate life cycle. Scaling habitat measurements to reflect a hierarchal habitat selection process can help to define habitat associations of bats. I assessed day roost habitat of female long-legged myotis at four scales: the roost structure, micro-habitat surrounding the roost, the stand level, and landscape level. I radio-tracked 16 female long-legged myotis (Myotis volans) for an average of eight days per bat, July through August of 1993, 1994, and 1995 in two drainages in the central Oregon Cascades (Quentin Creek and Lookout Creek) to locate day roost structures. Forty-one day roost structures were identified, of which 1 was a rock face, 4 were green trees, and 36 were snags. The average height of all roost structures was 40 m (SE=2.5). The average dbh for all snags and trees used as day roosts was 100 cm (SE=6.1). Large snags including partially live, hollow western redcedar trees (Thuja plicata) averaging 97 cm dbh (SE=6.6) and 38 m (SE=2.8) high were the most commonly used roost structures. Individuals radio-marked at the same night roost did not use one common day roost. Individual bats were found roosting in one roost for several days, or using multiple day roosts within discrete roost areas. The area which encompassed one night roost and all known day roosts covered 3,258 ha in the Quentin Creek drainage and 6,391 ha in Lookout Creek. I compared physical characteristics and habitat within 20 meters of 33 roost snags with 66 randomly selected snags. The odds that a snag is used as a day roost is associated with roost height; given height, the odds of use is associated with the height of the stand within 20 meters of the snag. There is some indication that the presence of an open canopy around the snag, and the percentage of bark on the snag also could be factors that influence the selection of snags as day roosts. The frequency of occurrence of roost structures within young and late seral stands did not differ from what was expected to occur by chance in these two stand conditions. Roosts did not occur in stands with a harvest history vs. stands without a harvest history disproportionate to availability. I compared the distance to class I (largest) through class IV (smallest) streams between 34 day roosts and 102 randomly selected points. Day roosts were located closer to streams than randomly selected locations in both Lookout and Quentin Creek drainages with 1 exception (Lookout class III). In two cases day roosts were significantly closer to streams than randomly selected locations. Day roosts tended to be closer to streams where night roosts were located than did randomly selected points, regardless of stream class.
Author: Christian C. Voigt
Publisher: Springer
ISBN: 3319252208
Category : Nature
Languages : en
Pages : 601
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Book Description
This book focuses on central themes related to the conservation of bats. It details their response to land-use change and management practices, intensified urbanization and roost disturbance and loss. Increasing interactions between humans and bats as a result of hunting, disease relationships, occupation of human dwellings, and conflict over fruit crops are explored in depth. Finally, contributors highlight the roles that taxonomy, conservation networks and conservation psychology have to play in conserving this imperilled but vital taxon. With over 1300 species, bats are the second largest order of mammals, yet as the Anthropocene dawns, bat populations around the world are in decline. Greater understanding of the anthropogenic drivers of this decline and exploration of possible mitigation measures are urgently needed if we are to retain global bat diversity in the coming decades. This book brings together teams of international experts to provide a global review of current understanding and recommend directions for future research and mitigation.
Author: Anthony Michael Hutson
Publisher: IUCN
ISBN: 9782831705958
Category : Bats
Languages : en
Pages : 272
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Book Description
Author: Akbar Zubaid
Publisher: Oxford University Press
ISBN: 0198035241
Category : Science
Languages : en
Pages : 359
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Book Description
Every three years a major international conference on bats draws the leading workers in the field to a carefully orchestrated presentation of the research and advances and current state of understanding of bat biology. Bats are the second most populous group of mammalia species, after rodents, and they are probably the most intensively studied group of mammals. Virtually all mammologists and a large proportion of organismic biologists are interested in bats. The earlier two edited books deriving from previous bat research conferences, as well as this one, have been rigorously edited by Tom Kunz and others, with all chapters subjected to peer review. The resulting volumes, published first by Academic Press and most recently by Smithsonian, have sold widely as the definitive synthetic treatments of current scientific understanding of bats.
Author: Donald Joyce Borror
Publisher: Houghton Mifflin Harcourt
ISBN: 9780395911709
Category : Nature
Languages : en
Pages : 460
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Book Description
Text and pictures combine to present 579 insect families.
Author: Rick A. Adams
Publisher: Springer Science & Business Media
ISBN: 1461473977
Category : Science
Languages : en
Pages : 549
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Book Description
Recent advances in the study of bats have changed the way we understand this illusive group of mammals. This volume consist of 25 chapters and 57 authors from around the globe all writing on the most recent finding on the evolution, ecology and conservation of bats. The chapters in this book are not intended to be exhaustive literature reviews, but instead extended manuscripts that bring new and fresh perspectives. Many chapters consist of previously unpublished data and are repetitive of new insights and understanding in bat evolution, ecology and conservation. All chapters were peer-reviewed and revised by the authors. Many of the chapters are multi-authored to provide comprehensive and authoritative coverage of the topics.
Author: Olivia A. Lappin
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Research on northern bobwhite calling behavior and roosting ecology during the breeding season has received limited attention. However, variability in calling rate in response to conspecifics and environmental factors may affect avian monitoring strategies. We conducted 10-minute breeding season surveys (April-August) on B. Bryan Farms, Mississippi, from 2021-2022 to evaluate the impact of conspecifics and environmental covariates on male bobwhite calling rate. We observed a positive linear effect of conspecifics and temperature on calling rate. We did not find sufficient evidence to support a relationship between calling rate and cloud cover or barometric pressure. We also analyzed breeding season third-order roost site selection and found selection against bare ground and a quadratic relationship with litter and average vegetation height during roosting activity. It is also important for managers to consider all conditions of the environment and habitat requirements during every season for population persistence, including breeding season roost cover.
Author: Michael J. Lacki
Publisher: JHU Press
ISBN: 0801884993
Category : Nature
Languages : en
Pages : 350
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Book Description
Although bats are often thought of as cave dwellers, many species depend on forests for all or part of the year. Of the 45 species of bats in North America, more than half depend on forests, using the bark of trees, tree cavities, or canopy foliage as roosting sites. Over the past two decades it has become increasingly clear that bat conservation and management are strongly linked to the health of forests within their range. Initially driven by concern for endangered species—the Indiana bat, for example—forest ecologists, timber managers, government agencies, and conservation organizations have been altering management plans and silvicultural practices to better accommodate bat species. Bats in Forests presents the work of a variety of experts who address many aspects of the ecology and conservation of bats. The chapter authors describe bat behavior, including the selection of roosts, foraging patterns, and seasonal migration as they relate to forests. They also discuss forest management and its influence on bat habitat. Both public lands and privately owned forests are considered, as well as techniques for monitoring bat populations and activity. The important role bats play in the ecology of forests—from control of insects to nutrient recycling—is revealed by a number of authors. Bat ecologists, bat conservationists, forest ecologists, and forest managers will find in this book an indispensable synthesis of the topics that concern them.
Author: Burton K. Lim
Publisher: Springer Nature
ISBN: 3030547272
Category : Science
Languages : en
Pages : 375
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Book Description
With more than 1,400 species, bats are an incredibly diverse and successful group of mammals that can serve as model systems for many unique evolutionary adaptations. Flight has allowed them to master the sky, while echolocation enables them to navigate in the dark. Being small, secretive, nocturnal creatures has made bats a challenge to study, but over the past 50 years, innovative research has made it possible to dispel some of the mystery and myth surrounding them to give us a better understanding of the role these animals play in the ecosystem. The structure of the book is based on several broad themes across the biological sciences, including the evolution of bats, their ecology and behavior, and conservation of biodiversity. Within these themes are more specific topics on important aspects of bat research, such as morphology, molecular biology, echolocation, taxonomy, systematics, threats to bats, social structure, reproduction, movements, and feeding strategies. Given its scope, the book will appeal to the wider scientific community, environmental organizations, and government policymakers who are interested in the interdisciplinary aspects of biology and nature.
