The relationship between song reper- toire size and reproductive success was investigated in a population of great reed warblers breeding in southern Germany. No correlations were found between repertoire size and various measures of male quality such as weight, wing length and age. Repertoire size was not correlated with territory size, but showed strong correlations with some measures of territory quality such as the amount of high quality reeds and reed-water interface. Repertoire size and territory quality were both cor- related with various measures of reproductive suc- cess. Partial correlation analysis revealed that terri- tory quality had a more significant effect upon the number of females obtained, but that repertoire size had a more significant effect upon the number of young produced.
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