Increased intensity of sexual activity does not affect male survivorship post infection. Kaplan – Meier plots of survivorship of males varying in intensity of sexual activity. In the experiment virgin males were divided into three treatments varying in intensity of sexual activity: Males held as virgins and did not interact with females, Low interaction where one male was held with one female and High interaction where one male was held with four females. 50 flies per treatment were infected. Post infection survivorship of one male held with one female (▲) and one male held with four females (■) was significantly better than (□) Virgin males (p = 0.0017, Cox proportion regression). Survivorship of one male held with one female (▲) and one male held with four females (■) was comparable (p = 0.61, Cox proportion regression). Separate sham infected controls for all three treatments were run. No mortality in any of the sham infected controls was observed and thus, they are represented by a single line (―――) in the figure.
Gupta et al. BMC Evolutionary Biology 2013 13:185 doi:10.1186/1471-2148-13-185