Sexual conflict in action: An antagonistic relationship between maternal and paternal sex allocation in the tammar wallaby, <i>Notamacropus eugenii</i>.

After dividing the offspring into two cohorts, it was noted that the younger cohort ( n = 9) exhibited a nonsignificant trend toward surplus male offspring (66.6% male; GLM [CI]: −0.639, 2.249), while the older cohort ( n = 10) exhibited a significant female bias (20% male; GLM [CI]: −3.277, −0.002; power = 0.82; Figure 3 ).

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In addition, the offspring SR at the time of birth appears to also be male‐biased (although only approaching significance), matching the Y‐chromosome bias, but the weaning cohort is female‐biased.

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