The ecological advantage of sexual reproduction in multicellular long-lived organisms

We present a model for the advantage of sexual reproduction in multicellular long-lived species in a world of structured resources in short supply. The model combines features of the Tangled Bank and the Red Queen hypothesis of sexual reproduction, and is of broad applicability. The model is ecologically explicit with the dynamics of resources and consumers being modelled by differential equations. The life history of consumers is shaped by body-mass dependent rates as implemented in the metabolic theory of ecology. We find that over a broad range of parameters sexual reproduction wins despite the twofold cost of producing males, due to the advantage of producing offspring that can exploit underutilized resources. The advantage is largest when maturation and production of offspring set in before the resources of the parents become depleted, but not too early, due to the cost of producing males. The model thus leads to the dominance of sexual reproduction in multicellular animals living ..., dataFig1aAverage equilibrium percentage of sexual females in dependence of maximum consumption rate epsilon (simulated electronically), here no migration is allowed, i.e., migration rate eta=0dataFig1bAverage equilibrium percentage of sexual females in dependence of intrinsic growth rate of resources G (simulated electronically), here no migration is allowed, i.e., migration rate eta=0dataFig1cAverage equilibrium percentage of sexual females in dependence of mortality strength 1/n (simulated electronically), here no migration is allowed, i.e., migration rate eta=0dataFig1dAverage equilibrium percentage of sexual females in dependence of resource diversity L (simulated electronically), here no migration is allowed, i.e., migration rate eta=0dataFig1eAverage equilibrium percentage of sexual females in dependence of minimum adult body mass Ba (simulated electronically), here no migration is allowed, i.e., migration rate eta=0dataFig2a_1Influence of the migration rate eta on the equilibrium...