Egg compounds in Japanese quail selected for contrasting social reinstatement (SR) behaviour.

<p>Data represent means (± SE) of yolk T (A), yolk androstenedione, A₄ (B), yolk progesterone, P₄ (C), yolk immunoglobulins, IgY (D) and albumen lysozyme (E) concentrations (upper row) and total egg content (bottom row) in the lines selected for high (HSR) and low (LSR) SR behaviour and the non-selected control line (CSR). Different letters above columns indicate significant differences between lines at the level of p<0.05.</p

Statistical analysis (hierarchical ANOVA with fixed effect of line and random effect of female nested within the line) of maternal antibodies (IgY) in the yolk and albumen lysozyme performed separately within genetic selection for the duration of tonic immobility, social reinstatement behaviour and yolk testosterone concentrations in Japanese quail.

<p>Statistical analysis (hierarchical ANOVA with fixed effect of line and random effect of female nested within the line) of maternal antibodies (IgY) in the yolk and albumen lysozyme performed separately within genetic selection for the duration of tonic immobility, social reinstatement behaviour and yolk testosterone concentrations in Japanese quail.</p

Egg compounds in Japanese quail selected for contrasting yolk testosterone (T) levels.

<p>Data represent means (± SE) of yolk T (A), yolk immunoglobulins, IgY (B) and albumen lysozyme (C) concentrations (upper row) and total egg content (bottom row) in the high (HET) and low (LET) egg T lines. Different letters above columns indicate significant differences between lines at the level of <i>p</i><0.05.</p

Means (± SE) of egg metrics for each genetic line of Japanese quail and corresponding among-line comparison by hierarchical ANOVA with fixed effect of line and random effect of female nested within the line.

a,b,c<p>different letters in the column indicate significant differences among lines at the level of <i>p</i><0.05.</p><p>STI, LTI and CTI – lines selected for short and long duration of tonic immobility and their control line.</p><p>HSR, LSR and CSR – lines selected for high and low social reinstatement behaviour and their control line.</p><p>HET, LET – lines selected for high and low egg testosterone concentrations.</p><p>Means (± SE) of egg metrics for each genetic line of Japanese quail and corresponding among-line comparison by hierarchical ANOVA with fixed effect of line and random effect of female nested within the line.</p

Egg compounds in Japanese quail selected for contrasting duration of tonic immobility (TI).

<p>Data represent means (± SE) of yolk T (A), yolk androstenedione, A₄ (B), yolk progesterone, P₄ (C), yolk immunoglobulins, IgY (D) and albumen lysozyme (E) concentrations (upper row) and total egg content (bottom row) in the lines selected for short (STI) and long (LTI) duration of TI and the non-selected control line (CTI). Different letters above columns indicate significant differences between lines at the level of <i>p</i><0.05. b^* indicates <i>p</i> = 0.057.</p

Frequency distributions of yolk testosterone (T) concentrations in genetic lines of Japanese quail.

<p>Frequency distributions of yolk T concentrations in lines selected for A) high and low egg T concentrations (the HET <i>vs</i> LET lines), B) short and long duration of tonic immobility (the STI <i>vs</i> LTI lines) and C) high and low social reinstatement behaviour (the HSR <i>vs</i> LSR lines). Fitted curves represent Gaussian regressions.</p