NATIONAL MILITARY FISH AND WILDLIFE ASSOCIATION: 2015 BAT WORKING GROUP MEETING Trish Cutler and...
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Transcript of NATIONAL MILITARY FISH AND WILDLIFE ASSOCIATION: 2015 BAT WORKING GROUP MEETING Trish Cutler and...
![Page 1: NATIONAL MILITARY FISH AND WILDLIFE ASSOCIATION: 2015 BAT WORKING GROUP MEETING Trish Cutler and Eric Britzke Co-chairs.](https://reader035.fdocuments.in/reader035/viewer/2022062804/5697bf931a28abf838c8f8ef/html5/thumbnails/1.jpg)
NATIONAL MILITARY FISH AND WILDLIFE ASSOCIATION:
2015 BAT WORKING GROUP MEETING
Trish Cutler and Eric Britzke
Co-chairs
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Outline
• Listing updates
• Acoustic monitoring basics
• Election
• Other business
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Northern long-eared bat
• Listing as endangered was deemed warranted in October 2013
• Final decision to be made by 2 April 2015
• Proposed 4d rule and re-opening of comment period on listing decision are open for comment until 17 March
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Other bats being assessed for potential listing
• Tri-colored bat– FWS is conducting status review
• Little brown bat– An official status review is being conducted– Date to be completed - ??????
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Echolocation
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Call Types
• Constant Frequency (CF)
• Frequency Modulated (FM)
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Types of echolocation calls
• Search phase
• Approach phase
• Feeding buzzes
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Picture of Analook file
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Call Variation
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Call Variation in Habitats
Open Clutter
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Factors affecting species ID
Recording environment
Acoustic ID
Analysis
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Impacts from the recording environment
• Habitat clutter
• Site selection
• Orientation
• Efficiency of the program will vary with these factors. To maximize accuracy and utility of the results, detectors should be placed in appropriate spots (a limitation of all sampling methods)
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Acoustic identifications are not perfect (and will never be)
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Classification rates (%) of mixture DFA
MYAU MYGR MYLE MYLU MYSE MYSO
MYAU 80 3MYGR 94 1MYLE 93 4 3MYLU 20 3 89 6MYSE 2 93MYSO 5 6 2 91Other 3 1