Effects of Cave Tours on Breeding Myotis velifer

Citation

Material Information

Title:
Effects of Cave Tours on Breeding Myotis velifer
Series Title:
The Journal of Wildlife Management
Creator:
Mann, Sherry L.
Steidl, Robert J.
Dalton, Virginia M.
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Arizona ( local )
Bats ( local )
Cave Management ( local )
Cave Myotis ( local )
Human Disturbance ( local )
Karchner Caverns ( local )
Maternity Roost ( local )
Mytosis Velifer ( local )
Recreational Caving ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
Human activity in caves can affect bats adversely, especially bats that assemble in maternity colonies where appropriate roosts are restricted to areas with a narrow range of microclimates necessary to raise young. We assessed behavioral responses of a maternity colony of about 1,000 cave myotis (Myotis velifer) to experimental cave tours by manipulating 3 factors: size of tour groups, whether tour groups talked, and a combination of light intensity and color used to illuminate trails. We also considered the effects of distances between bat roosts and the tour group as well as season. We measured 4 behavioral responses of bats: number of takeoffs, number of landings, activity level, and vocalization intensity. Light intensity affected bat behavior most; all bat responses were highest in trials with high-intensity white light and lowest in trials with no light. When tour groups talked, takeoffs, landings, and activity level increased. Size of tour groups and treatment interactions did not affect bat behaviors. When bats roosted near the tour route, takeoffs and activity level increased. In addition, all behavioral responses increased as the maternity season progressed. Designing cave tours to minimize short-term effects on bats will require careful consideration of cave lighting and tour frequency, route location, and noise levels.
Original Version:
The Journal of Wildlife Management, Vol. 66, no. 3 (2002-07).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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