Skip to main content
. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Dev Psychobiol. 2010 Oct 13;53(2):118–131. doi: 10.1002/dev.20498

FIGURE 1.

FIGURE 1

Nest occupancy and coordination in Experiment 1. For each data set, the first 12 PNDs were grouped into 3-day bins for analysis and for graphing: PND1 –3 = PND Bin 1, PND4–6 = PND Bin 2, etc. (A) Parents attended to the nest at approximately equal rates regardless of sex or group, and all decreased nest attendance over time. In the BP-group, BP-mothers and BP-fathers huddled on the nest at a high rate and were alone with their pups at approximately equal rates. (B) BP-parents left the nest exposed less than expected, suggesting behavioral coordination, for all five PND bins (*p < .05, paired t-tests), and BP pups were left exposed significantly less than SM pups. Bars represent mean ± SEM. ***p < .001, NS, not significant. Huddling indicates the time when both male and female were huddling together on the nest.