8 research outputs found

    Post-hoc model on female bonobo reproductive status and age of infant.

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    <p>The relationship between the variation in δ<sup>15</sup>N values and reproductive status interacting with age of offspring was clearly significant, suggesting that δ<sup>15</sup>N values change during pregnancy and within the lactation period with increasing age of infant. The model stability is indicated as alternative model lines (in gray) which fit well during pregnancy but also illustrate that it is unstable for lactating females, particularly as infants become increasingly independent from their mothers.</p

    δ<sup>13</sup>C values and medians for bonobo males, cycling (cyc), lactating (lac) and pregnant females (preg).

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    <p>According to our model the differences between males and females with different reproductive statuses are significant in δ<sup>13</sup>C values, with the highest values in lactating females. This relationship could not be tested in the δ<sup>15</sup>N values given the significant interaction of sex/reproductive state with social dominance rank.</p

    Model results for the effect of social dominance rank on the δ<sup>15</sup>N values in male (A) and female (B) bonobos.

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    <p>Rank had a significant effect on δ<sup>15</sup>N values in males, but not in females. Model stability is indicated by the grey alternative model lines, suggesting some influence of single hair samples and individuals which did not influence our overall results.</p

    Supplement methods from Sex-specific association patterns in bonobos and chimpanzees reflect species differences in cooperation

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    Definitions of party composition / Similarity of association data obtained from focal follow versus party follow / The three randomization methods used to extract the PAV values / Further information on the used models including the results from block and subset and randomizatio
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