Published April 12, 2019
| Version v1
Dataset
Open
Data from: Within-individual canalization contributes to age-related increases in trait repeatability: a longitudinal experiment in red knots
Description
Abstract: Age-related increases in the repeatable expression of labile phenotypic traits are often assumed to arise from an increase in among-individual variance due to differences in developmental plasticity or by means of state-behaviour feedbacks. However, age-related increases in repeatability could also arise from a decrease in within-individual variance as a result of stabilizing trait expression, i.e. canalization. Here we describe age-related changes in within- and among-individual variance components in two correlated traits, gizzard mass and exploration behavior, in a medium-sized shorebird, the red knot (Calidris canutus). Increased repeatability of gizzard mass came about due to an increase in among-individual variance, unrelated to differences in developmental plasticity, together with decreases in within-individual variance, consistent with canalization. We also found canalization of exploration, but no age-related increase in overall repeatability, which suggests that showing predictable expression of exploration behaviour may be advantageous from a very young age onward. Contrasts between juveniles and adults in the first year after their capture provide support for the idea that environmental conditions play a key role in generating among-individual variation in both gizzard mass and exploration behavior. Our study shows that stabilization of traits occurs under constant conditions: with increased exposure to predictable cues, individuals may become more certain in their assessment of the environment allowing traits to become canalized.
Notes
Files
kok et al2019_AmNat data within-indiv canalization.txt
Files
(79.6 kB)
Name | Size | Download all |
---|---|---|
md5:9fbf5f780a317647272ac0d00834cff7
|
50.2 kB | Preview Download |
md5:f6cad4536338aa6221e647feb61fcb2f
|
16.6 kB | Download |
md5:84507504697fa986081493554fabad4e
|
12.9 kB | Download |
Additional details
Related works
- Is cited by
- 10.1086/704593 (DOI)