Size-related sexual selection and yeast diet in drosophila buzzatii (diptera: drosophilidae)
Size-related sexual selection (SRSS) was examined on four traits (thorax and wing length and head and face width) in Drosophila buzzatii, by scoring male copulatory status in two mass-mating experiments. Using axenic females, experiment 1 was carried out with axenic males, and experiment 2 with yeas...
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_08927553_v9_n2_p329_Norry |
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| Sumario: | Size-related sexual selection (SRSS) was examined on four traits (thorax and wing length and head and face width) in Drosophila buzzatii, by scoring male copulatory status in two mass-mating experiments. Using axenic females, experiment 1 was carried out with axenic males, and experiment 2 with yeast-supplemented males. While there was no indication of SRSS in experiment 1, such selection was substantial in yeast-supplemented males, which transmitted yeasts to mating females. Multivariate analyses of selection indicated that face width is the measured trait on which directional SRSS essentially acted in yeast-supplemented males, resulting in indirect selection on body size. Because this selection was affected by yeast diet in males, its possible interaction with the yeast transmission from males to females during the courtship is discussed. © 1996 Plenum Publishing Corporation. |
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