| 21. | It may be a shorthand reference for a dominance hierarchy.
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| 22. | Such interactions created a dominance hierarchy headed by individuals with the greatest ovarian development.
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| 23. | None of the studied populations show dominance hierarchies and aggression tends to be low.
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| 24. | When a Queen dies the next Queen is selected by an age based dominance hierarchy.
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| 25. | The harem males suppress aggression between the females and prevent any dominance hierarchies from arising.
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| 26. | These increased levels of cortisol possibly correlate with size determining rank within the dominance hierarchy.
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| 27. | These sheep live in large flocks, and dominance hierarchies are often restructured each breeding season.
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| 28. | Groups include members of both sexes, including juveniles, and there are no discernible dominance hierarchies.
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| 29. | Males are often aggressive towards one another, creating a strict dominance hierarchy within the burrow.
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| 30. | There are no dominance hierarchies among the females, and the females do not form coalitions.
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