Percentage of correct and wrong choices of all 15 focal individuals on the penultimate and ultimate day of the recognition task.

<p>81.25% and above marks a performance above chance (dotted line). Asterisks mark significant differences: <i>p<0.001</i>.</p

Detailed information of the 15 focal individuals, which participated in the sibling recognition experiment as well as the randomly chosen sibling targets.

<p>Sibling targets marked in bold represent targets genetically related to one another.</p

Statistical results of the generalized linear mixed model (GLMM) to determine possible influences on the performance in the recognition task.

<p>The binomial response variable was correct/wrong choice in the ultimate 32 trials of the 15 focal individuals. For the full model, results of all tested fixed terms are given. For the final model, results of terms that remained in the final model are given in bold, and results of excluded terms when individually re-entered into the final model are given in italics.</p

Performance of the 15 focal individuals on the penultimate and ultimate days when goslings passed the task, or of the 40^th and 41^st days of the individuals that did not pass (DNP) the task in the allotted time.

<p>Session marked in bold indicate performance above chance (Binomial tests P<0.05).</p

Overview about the number of detected compounds.

<p>Overview about the number of detected compounds.</p

Number of confirmed compounds retrieved dependent on the adsorbent used.

<p>Number of confirmed compounds retrieved dependent on the adsorbent used.</p

Comparison of TD tube peaks which are in common with the mobile GC-MS and occurring only in TD.

<p>Box-and-whisker plots of the relative peak areas from integration of TD tubes Mix peaks in common with the mobile GC-MS samples (left, Median_common = 4.25 x 10^-4, N_common = 183) and peaks which are unique for TD tubes Mix (right, Median_TD = 0.12 x 10⁻⁴, N_TD = 9217). Bold, solid lines indicate medians, boxes range from the lower to the upper quartiles, lower whiskers are defined as max(min(x), Q_1–1.5 * IQR), upper whiskers equal min(max(x), Q_3 + 1.5 * IQR), open circles are outliers, dotted lines depict the means and asterisk indicates the significant difference. The relative peak areas were log transformed, the y-axis of the plot is on original scale.</p

Compounds in common to TD tubes Mix and mobile GC-MS samples.

<p>Compounds in common to TD tubes Mix and mobile GC-MS samples.</p

Excretion profiles of immunoreactive corticosterone metabolites in ng CORTm/g dropping on control (grey circles) and challenge (black circles) day over time (GMT +1 hr.).

<p>Each point represents the mean (± S.E.M.) of all samples collected during a 15-min interval, <i>e</i>.<i>g</i>. the first data point represents the mean of dropping samples collected between 10:45–10:59. Horizontal lines indicate the overall mean during control (line style: dash–dot–dot) and challenge (line style: dash) day. Duration of confinement on the challenge day is shown by ←→.</p

Details of barnacle geese used for the EIA validation.

<p>Details of barnacle geese used for the EIA validation.</p