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The use of acoustics to monitor burrow-nesting white-chinned petrels Procellaria aequinoctialis at Bird Island, South Georgia

Berrow, Simon D.. 2000 The use of acoustics to monitor burrow-nesting white-chinned petrels Procellaria aequinoctialis at Bird Island, South Georgia. Polar Biology, 23 (8). 575-579. 10.1007/s003000000128

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Abstract/Summary

Tape recordings of two types of vocalisations were used to assess burrow occupancy by white-chinned petrels (Procellaria aequinoctialis) at South Georgia. Birds responded to the rattle call on 74% of occasions and a wheezy call on 85%, with only 10% failing to respond to both calls played one after the other. Occupancy was determined throughout the pre-egg and incubation period and results confirmed what is known about patterns of occupancy by white-chinned petrels. Adults in burrows known to hatch a chick responded on average to 69% of recordings during incubation and less than 10% in only 4% of burrows. Significant inter-site and inter-annual variations in occupancy were recorded, suggesting that this method is sensitive to changes in the number of petrels returning to breed. A sampling protocol for providing population indices for monitoring purposes is recommended.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s003000000128
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 0722-4060
Date made live: 15 Nov 2012 09:17
URI: http://nora.nerc.ac.uk/id/eprint/20407

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