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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Tracking devices attached with harnesses influence behaviour but not body mass of Princess Parrots Polytelis alexandrae
Auteurs :	Ashley Herrod, Auteur ; Meaghan King, Auteur ; Dean Ingwersen, Auteur ; Rohan H. Clarke, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (155(2) APR 2014)
Article en page(s) :	519-529
Langues:	Anglais
Résumé :	The use of tracking devices to monitor the movements of parrots can benefit conservation and management efforts in species for which there is scant information on their habitat use and distribution. Before such studies can proceed, there is a clear need to assess the efficacy of tag attachment so as not to create welfare issues for the target individuals or negate the scientific value of subsequent tracking results. We developed a harness and trialled it as a method of attaching 5-g non-operational satellite tags to captive Princess Parrots Polytelis alexandrae. The influence of the harness package on the parrots' activity budgets and body mass was investigated, and comparisons were made with control individuals not fitted with harness packages. The attachment of harness packages led to an initial increase in preening rates at the expense of resting and foraging behaviour, but did not affect the duration of eating and drinking behaviours. Despite an initial difference between the behaviours of tagged parrots and control parrots, after 3 weeks the rates of behaviour of tagged parrots matched those of the controls, suggesting they were more accepting of the harness and satellite tag by this time. The harness package had no effect on body mass; a similar pattern was observed for mean weight change per fortnight between tagged and control parrots. Three-quarters of all harness packages were worn by the tagged parrots for the full captive trial (98 days) without harness damage. The harness design tested here is likely transferable to other bird species that display similar structure and wing-loadings, and as such is a valuable contribution to avian tracking studies.

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