SEEN - SE European Bird Migration Network
What do low active birds show in Busse`s experimental cages?
Jarosław K. Nowakowski(1), Sancar Bariş(2) Kiraz Erciyas(3), Arzu Gürsoy(3), Cemal Özsemir(3)
1) Department of Zoology, University of Podlasie, Prusa 12, 08-110 Siedlce, Poland; Bird Migration Research Station, University of Gdańsk, Przebendowo, 84-210 Choczewo, Poland
2) Ondokuz Mayis University Ornithological Research Center, Samsun, Turkey
3) Ondokuz Mayis University, Biology Department, Faculty of Arts and Sciences, Kurupelit, Samsun, Turkey

In autumn 2002 at Cernek Ringing Station (N Turkey) we compared directional preferences of 52 individuals which were the least active during experiments in Busse’s cages (up to 55 scratches in a 10-minute experiment) with the remaining 850 more active birds (over 56 scratches). We stated significant differences in their directional preferences – birds of low activity headed to the two northern directions (ca 30? and ca 325?), while the remaining ones – to W and SW (different directions, from ca 210? to 300?). Directions preferred by birds of low activity were exactly opposite (180? difference) to those from which the birds were most often put into the experiment cage. This shows that in birds of low activity the crucial influence on the result is made by the disturbance connected with the way of conducting the experiment. Such data should be excluded from analyses of birds’ directionality in Busse’s cages.
Created by Pronetix 2006