Author: Merlin D. TuttlePublisher:
ISBN:
Category : Abandoned mines
Languages : en
Pages : 56
Book Description
Bats and Mines
Author: Merlin D. TuttlePublisher:
ISBN:
Category : Abandoned mines
Languages : en
Pages : 56
Book Description
Managing Abandoned Mines for Bats
Author: Richard E. SherwinPublisher:
ISBN:
Category : Abandoned mines
Languages : en
Pages :
Book Description
Bats and Mines
Author: Assessment of Mines for Importance to Bat Species of Concern, Southwestern Montana
Author: H. Peter FeigleyPublisher:
ISBN:
Category : Abandoned mined lands reclamation
Languages : en
Pages : 18
Book Description
A program to close abandoned mines on BLM lands in southwestern Montana is scheduled. Some of these mines may provide habitat for up to 15 species of bats, including six U.S. fish and Wildlife Service Designated Species of Concern (former category 2 species). The USGS biological Resources Division provided funding to the Montana Natural Heritage Program to survey abandoned mines in southwest Montana for bat use. The objective of this study is to identify mines used by bats and evaluate a variety of external and internal variables that would enhance predictive capabilities for locating active roosts and hibernacula. The results of this study will assist in avoiding the elimination of habitat that may be important to bats. Fieldwork was initiated on August 18, 1997 and continued through October 15, 1997. Eighty-six abandoned and inactive mines were visited. Sixty-eight mines had one or more openings that might be suitable for bats. Openings had completely collapsed or were backfilled at 18 mines. Eleven mines were rated as having high potential to provide bat habitat. Mines which appeared to have the best potential for current bat use included the Bluewing, Clipper, Hendricks, Huron/Cottontail, Keystone, Shoemaker, and an unnamed cluster of shafts near the Watseca mine. These mines were extensive with complex workings that may interconnect underground, facilitating air flow through the mine. Mines in the Bannack mining district appeared to be the most stable and exhibit the greatest potential for internal surveys. These mines were mostly located in limestone substrate. Most mines in the Rochester mining district were situated in oxidized shists that were very friable and appeared to be quite unstable and unsuitable for internal surveys. External monitoring for bat activity was conducted at 66 openings from 34 mines. Ultrasonic monitoring was conducted at 59 openings; while mist-netting was conducted at eight locations. Bat activity was documented at 24 mines. However, analysis of ultrasonic recording is currently in progress, which may reveal more activity. Tentative bat species detected by ultrasonic methods include unidentified Myotis species, western long-footed myotis (Myotis evotis), silver-haired bat (Lasionycteris noctivagans), big brown bat (Eptesicus fuscus), and possibly the Townsend big-eared bat (Corynorhinus townsendii). Myotis ciliolabrum and M. evotis were the only species captured in mist nets, with 17 and three captures, respectively. Most captures were of adult non-reproductive males, while only one adult non-reproductive female M. ciliolabrum and one juvenile male M. ciliolabrum were captured. Development of a GIS database of mine locations and sampled openings is in progress. Field-survey data are being entered into appropriate data tables and linked to a master database obtained from the Montana Bureau of Mines and Geology.
Roost Environments for Bats Using Abandoned Mines in Southwestern Montana
Author: Montana Natural Heritage ProgramPublisher: Palala Press
ISBN: 9781341946356
Category :
Languages : en
Pages : 28
Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Roost Environments for Bats Using Abandoned Mines in Southwestern Montana
Author: Paul HendricksPublisher:
ISBN:
Category : Abandoned mines
Languages : en
Pages : 19
Book Description
Mine Assessment for Bats
Author: United States. Bureau of Land ManagementPublisher:
ISBN:
Category : Abandoned mines
Languages : en
Pages :
Book Description
Learn to establish protocols for and conduct surveys of inactive/abandoned mines for bats and assess a site's value as bat habitat in a safe, thorough and well-documented manner.
Assessing the Stability and Long-term Viability of Abandoned Mines for Use by Bats
Author: Jeffrey C. CorcoranPublisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description
There are 12 species of bats that occur in Illinois; 5 of these species can be found hibernating in abandoned mines and caves in southern Illinois. Due to the destruction of their natural hibernacula, caves, many species of bats have found abandoned mines to be suitable replacement habitat. A complex of abandoned underground microcrystalline silica mines in southern Illinois owned by Unimin Specialty Minerals Corporation now provides hibernacula for 5 species of cavernicolous bats: the federally endangered Indiana bat (Myotis sodalis), little brown bat (M. lucifugus), eastern pipistrelle (Perimyotis subflavus), big brown bat (Eptesicus fuscus), and the northern long-eared bat (M. septentrionalis). Within the last 10 years the number of bats using these mines has increased dramatically, especially the Indiana bat which has increased from just over 9,000 to 43,000 hibernating in Magazine Mine. One concern of having so many endangered bats hibernating in one mine is stability. Mines were created relatively recently and are still in the process of settling. Thus, these mines might act as a potential sink, drawing in hibernating bats but potentially collapsing and killing them. Thirteen mines were surveyed for bats and for the amount of spalling that occurred over the 16-month study period from September 2006 to December 2007. Factors that could increase the amount of spalling were quantified, including temperature, moisture, and moisture variability in the material of the walls in the mines, and temperature variability. Number of hibernating bats in the mines was also documented. Data were analyzed with logistic regression. Temperature was a significant predictor of spalling (W2 = 12.76, p = 0.0004) when considered as a univariate variable, as was temperature variation (W2 = 21.89, p =
Bat Utilization of Abandoned Mines
Author: John O. WhitakerPublisher:
ISBN:
Category : Abandoned mines
Languages : en
Pages : 28
Book Description
Author: