Status of the Gray Bat in Missouri Caves PDF Download

Author: Wilber J. Gunier
Publisher:
ISBN:
Category : Biospeleology
Languages : en
Pages : 5

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Author:
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Category : Endangered species
Languages : en
Pages : 162

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Author: Cheyenne Gerdes
Publisher:
ISBN:
Category : Bats
Languages : en
Pages : 96

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Migration is an important and understudied aspect of the life histories of many species, particularly bats. Migration impacts conservation efforts, including efforts to manage the impacts of wildlife disease. The federally endangered gray bat (Myotis grisescens) is a migratory species with documented infections by Pseudogymnoascus destructans, the fungus that causes White-nose Syndrome (WNS). To better understand migration as it might relate to WNS, I quantified the timing and location of gray bat movements in Missouri using acoustic detectors and bat banding. I recorded calls at 4 maternity sites from January to May 2015, and used the R package PVAClone to generate estimates of r and K as measures of arrival rate and an index of population size at the maternity sites respectively. These values were plotted against each cave’s distance from a major hibernaculum to examine whether there was an effect on the arrival of gray bats at a site. Values of r varied between 0.3 and 0.9, and values of K varied between 981 and 3020 among the maternity roosts: estimates were consistent whether considering observation error or not. While bats arrived at the closest maternity colony quicker and in greater numbers, the remaining rates and indices were equivocal with distance. Over 1,000 gray bats were banded and 18 were relocated, revealing previously undocumented connections between gray bat caves across the region. The acoustic methodology used in this thesis could be useful for management officials wanting to monitor the timing of bat migration and site activity, both of which could be affected by WNS. The cave network used by gray bats in Missouri could yield insight into how WNS spreads across cave networks.

Author: Joshua David Parris
Publisher:
ISBN:
Category : Bats
Languages : en
Pages : 138

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The arrival of white-nose syndrome (WNS) has stimulated interest in winter bat activity. Data from a bat activity study in southern Missouri indicated winter gray bat (Myotis grisescens) activity above expected levels. Study objectives were to assess gray bat winter activity including investigating winter feeding, the need for water, whether winter activity occurs at caves and foraging areas, whether gray bats are more active relative to other species, and the effect of climate variables. Acoustic monitoring occurred over three winters at areas in Laclede, Shannon, and Washington counties Missouri, and captures occurred during the 2012-13 winter at Coffin Cave in Laclede County and Bat Cave in Shannon County. I collected temperature, humidity, and barometric pressure data at Coffin Cave and Bat Cave during 2012-13. Gray bats were captured on 24 of 26 attempts, at temperatures as low as -1.7oC. Of 350 bats captured, three provided a feeding fecal sample during mid-winter. Urinating was recorded in >50% of gray bats. Those at Coffin Cave, with available water, urinated earlier than at Bat Cave, with no available water. Acoustic data indicated that gray bats were active all winter at caves and foraging areas and at higher proportions than expected based on cave populations. Activity at Bat Cave correlated with inside humidity and outside temperature, while activity at Coffin Cave did not correlate with climate variables. Activity at Bat Cave was higher than at Coffin Cave. Water needs appear to drive activity.

Author: Susan H. Gray
Publisher: Cherry Lake
ISBN: 1602791724
Category : Juvenile Nonfiction
Languages : en
Pages : 36

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Many people are afraid of bats, but like every other living thing they play in important role in nature. Readers will learn about cave dwelling gray bats, how they became endangered, and how government leaders and scientists have teamed up to save these furry, flying creatures.

Author: Richard K. LaVal
Publisher:
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Category : Bats
Languages : en
Pages : 62

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Category :
Languages : en
Pages : 106

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The gray bat (Myotis grisescens) is a federally listed endangered species known to occur on several U.S. Army installations in the eastern United States. Seven Army installations and one Air Force base have documented gray bat populations, and these facilities have undertaken programs to protect roosting and foraging sites important to the species. This report reviews the status of the gray bat throughout its range and assesses the population status of gray bats at major hibernacula in Arkansas, Missouri, Kentucky, and Tennessee. Survey records obtained from state agencies showed that in recent years gray bat populations have increased significantly in most primary summer and winter caves. In 2005 the Army cooperated with the U.S. Fish and Wildlife Service and other state and Federal agencies to undertake a range-wide survey of primary gray bat hibernacula. Hibernacula surveys were conducted from December 2005 - January 2007 in ii caves considered to be critical wintering sites. Results of the survey showed stable to increasing population levels across the species' range. Additionally, a Department of Defense Legacy project was implemented to support conservation efforts to assist with recovery of the gray bat. The project funded improvements and protection of several cave sites in Tennessee and Kentucky, hibernacula surveys of selected caves, and summer surveys of maternity caves in Tennessee. The Army Threatened and Endangered Species Research Program also provided support for these tasks. The current range-wide population of the gray bat is estimated at approximately 3.4 million bats.

Author: David S. Thies
Publisher:
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Category : Gray bat
Languages : en
Pages : 0

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A report of mites extracted from gray bats collected from Marvel Cave in Stone County and Tunnel Cave and Bat Cave in Pulaski County.

Author:
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Category : Federal aid to research
Languages : en
Pages : 938

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Author:
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ISBN:
Category :
Languages : en
Pages : 298

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