Lack of such negative correlation between vigilance and the number of dominant heterospecifics in a group, despite the marginally significant positive association between total group size and the number of dominants, is consistent with the anti-dominant vigilance hypothesis.
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Vigilance responding to number of conspecifics among mixed groups of cranes in demilitarized zone.
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The sentences
This lack of relationship between the number of the Red-crowned cranes and the White-naped crane's vigilance, despite the marginally non-significant positive relationship between the number of the Red-crowned cranes and the total group size, appears inconsistent with the classical antipredatory hypothesis (Pulliam 1973 ).