Hide menu

Boldness

Bar chart showing the flying initiation distances mean and the Standard Deviations (in centimetres) for the urban and rural Chiguanco Trush individuals.
The birds sampled in the urban areas have a higher tolerance to human proximity than the birds sampled in the rural areas (t44 = -10.95; p < 0.001). In addition, the rural individuals have a bigger variation in the flying initiation distances than their urban conspecifics.

Neophobia

Bar chart showing neophobia mean and Standard Deviations (in seconds) for the Chiguanco Trush individuals trapped in the urban areas and the ones trapped in the rural areas

All the birds tested in neophobia approached the object. The birds trapped in the urban area approached the novel object faster than the ones trapped in the rural area (t18 = -3.64; p = 0.002). The rural individuals again show a higher variation in the latencies to approach the novel object than their urban conspecifics.

Problem solving abilities

a) Number of Chiguanco Trush individuals trapped in the urban areas and individuals trapped in the rural areas which solved or did not solve tube and drawer test, total number of individuals which solved or did not solve the tube and drawer tests and the significance values (p value). Significant values (p < 0,05) are marked with an asterisk (*). b) Bar chart showing the average latency to solve: a) drawer task and b) tube task, including the standard deviations (in seconds), for the Chiguanco Trush individuals trapped in the urban areas and the ones trapped in the rural areas.

The results show with a 95% probability that there was a higher number of the birds trapped in the rural areas that did not solve the tube task (9/10) compared to the ones that did solved it (1/10) (p=0.010). The results also show that a higher number of the birds trapped in the urban areas solved the drawer task (2/10) compared to non-solvers (8/10) (p=0.044). In Addition, it was possible to observe that a higher number of birds, both rural and urban, did not solved the tube task (15/20) compared to the ones who solved it (5/20) (p=0.015). Even if there were no statistical significant differences, a higher number of the birds trapped in the urban areas solved both the tube and the drawer task compared to the number of birds trapped in the rural areas. There were no differences between urban and rural individuals in the latency to solve the drawer task. However, the urban individuals which solved the tube task took shorter time to do it than the unique rural individual who solved it (t3 = -5,07; p=0.015).


Responsible for this page: Agneta Johansson
Last updated: 05/15/17