|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
About the Cover
Cover: Altricial white-crowned sparrows develop from dependent hatchlings (left: 2 days after hatching) to alert fledglings (right: near fledging) in ∼10 days. These young may face a cost−benefit trade-off due to the actions of stress hormones, glucocorticoids (GCs); GCs are critical during development but excess hormone can reduce growth and survival. Using non-invasive administration of GCs, H. Wada and C. W. Breuner examined the effects of brief, moderate elevations of GCs on begging behavior and growth (pp. 1696-1703), and show that GCs can have rapid, negative effects on begging behavior and negative effects on growth within 24 h. Photo courtesy of Haruka Wada.
[Table of Contents]