Researchers from McMaster University publish new studies and findings in the area of biochemical zoology.(Report)

Chemicals & Chemistry | November 13, 2009 | Copyright

"In group-living species, dominant individuals are frequently aggressive toward subordinates, and such dominant aggression can lead to chronic stress, higher glucocorticoid levels, and decreased fitness for subordinates. However, in many cooperatively breeding species, it is surprisingly the dominants rather than the subordinates that exhibit higher levels of glucocorticoids, a possible consequence of the demands of maintaining high social rank and socially suppressing the reproduction of other group members," scientists in Hamilton, Canada report.

"This study ...

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