Hi all,
Have just had a discussion re effects of playback with a colleague and they
suggested a different approach to studying this. There is work being done
at the moment measuring the stress of disturbance on birds via testing
physiological response chemicals in blood (adrenocorticosteroids), and body
condition. This could easily be adapted with the right experimental design
to look at playback effects. It could also be done on birds in captivity
first to see if there is a good response in songbirds before taking it into
the field, which would help sort out the type of signal you are looking for
and how strong it is likely to be (and therefore how many birds you would
need to catch to be sure of your results).
Some research for those with access:
Modulation of the Adrenocortical Responses to Acute *Stress *in Arctic *
Birds*: A Possible Ecological
Bias<http://icb.oxfordjournals.org/cgi/content/abstract/35/3/285>
JC WINGFIELD, KM O'REILLY, LEEB ASTHEIMER - Integrative and Comparative
Biology, 1995 - Soc Integ Comp Biol
Behavioral and hormonal responses of Magellanic penguins (Spheniscus
magellanicus) to tourism and nest site
visitation<http://linkinghub.elsevier.com/retrieve/pii/S0006320799000269>
GS Fowler - Biological Conservation, 1999 - Elsevier
Dynamics of food availability, body condition and physiological stress
response in breeding Black-legged
Kittiwakes<http://www.blackwell-synergy.com/doi/abs/10.1046/j.1365-2435.1999.00352.x>
AS Kitaysky, JC Wingfield, JF Piatt - Functional Ecology, 1999 - Blackwell
Synergy
Exposure to ecotourism reduces survival and affects *stress *response in
hoatzin chicks (Opisthocomus
hoatzin)<http://linkinghub.elsevier.com/retrieve/pii/S0006320703004014>
A Müllner, K Eduard Linsenmair, M Wikelski - Biological Conservation, 2004 -
Elsevier
Regards,
Chris
==============================www.birding-aus.org
birding-aus.blogspot.com
To unsubscribe from this mailing list,
send the message:
unsubscribe
(in the body of the message, with no Subject line)
to:
=============================
|
