Maternal androgens in avian brood parasites and their hosts: Responses to parasitism and competition?

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• 作者：D. Caldwell Hahn^a ; ^{chahn@usgs.gov} ; John C. Wingfield^b ; ^{jcwingfield@ucdavis.edu} ; David M. Fox^c ; ^{david_m_fox@nps.gov} ; Brian G. Walker^d ; ^{bwalker@fairfield.edu} ; Jill E. Thomley^e ; ^{thomleyje@appstate.edu}
• 关键词：Arms race ; Cowbird ; Maternal effects ; Parasitism ; Tolerance ; Yolk testosterone
• 刊名：General and Comparative Endocrinology
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：240
• 期：Complete
• 页码：143-152
• 全文大小：429 K
• 卷排序：240

文摘

In the arms race, two discoveries: both brood parasite & hosts use maternal effects. Host bird eggs have elevated yolk T in parasitized nests. Cowbirds use elevated yolk T when competition is high for host nests. First evidence that songbirds use a tolerance defense against brood parasitism. Small host size may determine use of tolerance rather than resistance defense.