Table 3. Choice combinations: C1-6 are combinations assayed during the two-way choice experiment. Each combination had two types of females differing with respect to their age (young/old) and/or nutritional status (high/low Yeasted): Young High Yeasted (Y/HY), Young Low Yeasted (Y/LY), Old High Yeasted (O/HY) and Old Low Yeasted (O/LY). Based on fitness measurement these females are categorized as higher-fitness female and lower-fitness female in each combination type.

Combination type	Females involved	Higher-fitness female	Lower-fitness female
C1	O/HY vs. O/LY	O/HY	O/LY
C2	O/HY vs. Y/HY	Y/HY	O/HY
C3	O/HY vs. Y/LY	Y/LY	O/HY
C4	Y/HY vs. O/LY	Y/HY	O/LY
C5	O/LY vs. Y/LY	Y/LY	O/LY
C6	Y/HY vs. Y/LY	Y/HY	Y/LY