Reports

Gonadotrophic Hormones Affect Aggressive Behavior in Starlings

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Science  10 Nov 1961:
Vol. 134, Issue 3489, pp. 1522-1523
DOI: 10.1126/science.134.3489.1522

Abstract

Injections of gonadotrophic hormones into subordinate male European starlings produced reversals in social rank, suggesting that pituitary gonadotrophic hormones rather than gonadal hormones influence aggressive behavior in this species.