Table 2.
Mean values for tail white, parental behavior, and aggression across populations and in relation to T in response to GnRH
| Trait | VA | CA-A | CA-C | SD |
|---|---|---|---|---|
| Tail white (sum) | 2.29a | 2.64f | 2.21f | 3.57h |
| Tail white (%) | 38a | 44f | 37f | 60h |
| Parental behavior (visits/h) | 4.3b | 2.53g | 3.82g | – |
| Aggression (latency in sec, songs/10 min) | 115c, 54c | – | – | – |
| T, rise spring (ng/ml) | 4.2d | 7.2g | 6.1g | 5.9i |
| T, post STI (ng/ml) | 8.3e | 6.0g | 2.5g | – |
Data from VA are published; data for CA and SD are still preliminary and are currently under analysis by J.W. Atwell, C. Bergeon Burns, and K. Cain.
VA (a–e): a(Wolf et al. 2004); b(Ketterson et al. 1992);c(McGlothlin et al. 2007); d(Jawor et al. 2006); e(McGlothlin et al. 2008). CA-A and CA-C: (f–g); f(Yeh 2004); g(Atwell et al. in preparation, data still preliminary; SD (h–i); h(Ketterson and Nolan, unpubl.); i(Bergeon, Cain, et al. unpubl., data quite preliminary).
Tail white (sum) = proportion of tail feathers that are white, summed over right side of tail; for CA we took published percentage times 6, then converted to a proportion. Tail white = computed percentage of each feather that is white, summed over right side, divided by 6; for VA we took published sum of proportions, converted to a percentage, divided by 6. Parental behavior = feeding nestlings; aggressive behavior = behavioral response after an STI; T, rise spring = increase in T after GnRH challenge; T, post STI = T upon capture after an STI.