PMID: 3770654Sep 1, 1986Paper

Behavioral and endocrine correlates of multiple brooding in the semicolonial house sparrow Passer domesticus. II. Females

Hormones and Behavior
R E Hegner, John C Wingfield

Abstract

Behavioral and endocrine changes associated with reproductive events were studied in free-living female house sparrows (Passer domesticus). Circulating levels of luteinizing hormone (LH) and estradiol (E2) were maximal during egg-laying, declined during incubation, and began to rise during the nestling stage. This pattern was repeated three to five times during the prolonged breeding season of this species. Multivariate statistical analysis demonstrated that elevated levels of LH and E2 were associated with maximal sexual activity, high rates of intrusion at nests by conspecifics, and elevated rates of agonistic activity. Patterns of sexual activity varied during the season and perhaps reflected differing strategies for protecting paternity adopted by the male. Curiously, elevated levels of testosterone (T) and dihydrotestosterone (DHT) were not associated with high levels of intrusion or agonistic response, but rather were associated with incubation stages. As in males, concentrations of corticosterone (B) were high during each egg-laying and nestling stage and were associated with high or rising levels of reproductive hormones, suggesting that reproductive activity was not overly stressful to these birds. Body mass and fat de...Continue Reading

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Citations

Jul 27, 1999·General and Comparative Endocrinology·J L LiparJ M Casto
Apr 14, 2009·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Tim S JessopDevi Stuart-Fox
Feb 28, 2003·General and Comparative Endocrinology·Katrina G Salvante, Tony D Williams
Oct 7, 2004·Hormones and Behavior·Kristin A KochJohn D Buntin
Dec 1, 1990·General and Comparative Endocrinology·C L Gratto-TrevorF Cooke
Oct 1, 1996·The Journal of Experimental Zoology·H Schwabl
Nov 17, 2009·The Journal of Experimental Biology·K S Henry, J R Lucas

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