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The white-browed sparrow weaver (Plocepasser mahali) is a cooperatively breeding Ploceid finch that lives in groups of up to 11 individuals. Each group consists of a dominant breeding male and female and a varying number of nonreproductive birds that help feed young and defend the group territory. Experimental removal of the dominant male resulted in(More)
Behavioral and endocrine changes associated with reproductive events were studied in free-living male house sparrows (Passer domesticus). Circulating levels of luteinizing hormone (LH), testosterone (T), and dihydrotestosterone (DHT) were maximal during egg-laying and declined during incubation and the first 2/3 of the nestling stage. As the young(More)
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(More)
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