Seasonal fluctuations in plasma testosterone levels and diurnal song activity in free-living male great tits

Author: Van Duyse E.   Pinxten R.   Eens M.  

Publisher: Elsevier

ISSN: 0016-6480

Source: General and Comparative Endocrinology, Vol.134, Iss.1, 2003-10, pp. : 1-9

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Abstract