|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 6. Daytime locomotor activity (hops min-1), plasma free fatty acids
(mmol l-1) and plasma corticosterone (ng ml-1) during
the food manipulation trial, both in spring migrants and in wintering birds.
White-crowned sparrows were treated with RU486 or with vehicle and were either
in a fasting state or were provided with ad libitum food. Locomotor
activity was higher in fasting birds than in birds held on ad libitum
food. Plasma free fatty acids and plasma corticosterone also increased with
fasting, and RU486 suppressed the fasting-associated increase in fatty acids.
Corticosterone concentrations were determined from blood samples collected in
under 3 min of disturbance. Sample size is indicated. Asterisks indicate
significant differences between groups. Error bars represent
S.E.M.
|
