Preliminary study on the effects of photo traps used to monitor Mediterranean monk seals Monachus monachus

Date

2010-05-20

Author

Gücü, Ali Cemal

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

16
views

19
downloads

Cite This

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

Collections

Graduate School of Marine Sciences, Article