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Preliminary study on the effects of photo traps used to monitor Mediterranean monk seals Monachus monachus
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Date
2010-05-20
Author
Gücü, Ali Cemal
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I evaluate the possible deterrent effect of visual-flash photo traps used to monitor Mediterranean monk seals Monachus monachus in their caves. Two systems of photo trapping were deployed in a cave, one using a flashing visible light and the other using an infrared light source. These systems were used alternately, each for an average duration of 1 wk at a time. A total of 453 digital photographs were taken by the photo traps throughout the experiment, which was conducted from July 2007 to February 2008. Based on an analysis of these photographs, 4 individuals of different age classes were identified. The individuals monitored never displayed an escape response following the flash; although some briefly responded to the flash, they quickly resumed their resting behaviour. Analysis of 47 haul-out events indicated that the average haul-out time of seals repeatedly exposed to a visible flash is longer than that of seals exposed to infrared flash. Although the small sample size limits conclusions, the striking difference found between haul-out times may be a sign of a negative effect which influences resting time of individuals.
Subject Keywords
Breeding caves
,
Disturbance
,
Infra-red cameras
,
Mediterranean monk seal
,
Monachus monachus
,
Turkey
,
Visual-flash photo traps
URI
https://hdl.handle.net/11511/30995
Journal
Endangered Species Research
DOI
https://doi.org/10.3354/esr00208
Collections
Graduate School of Marine Sciences, Article
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A. C. Gücü, “Preliminary study on the effects of photo traps used to monitor Mediterranean monk seals Monachus monachus,”
Endangered Species Research
, pp. 281–285, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30995.