the effect of diet quality and wing morph on male and female reproductive investment in a nuptial feeding ground cricket饮食质量和机翼变形的影响在男性和女性生殖投资婚礼觅食地板球.pdf

The Effect of Diet Quality and Wing Morph on Male and Female Reproductive Investment in a Nuptial Feeding Ground Cricket 1 ` 2 1 Matthew D. Hall *, Luc F. Bussiere , Robert Brooks 1 Evolution Ecology Research Centre and School of Biological, Earth Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia, 2 School of Biological Environmental Sciences, University of Stirling, Stirling, Scotland, United Kingdom Abstract A common approach in the study of life-history trade-off evolution is to manipulate the nutrient content of diets during the life of an individual in order observe how the acquisition of resources influences the relationship between reproduction, lifespan and other life-history parameters such as dispersal. Here, we manipulate the quality of diet that replicate laboratory populations received as a thorough test of how diet quality influences the life-history trade-offs associated with reproductive investment in a nuptial feeding Australian ground cricket (Pteronemobius sp.). In this species, both males and females make significant contributions to the production of offspring, as males provide a nuptial gift by allowing females to chew on a modified tibial spur during copulation and feed directing on their haemolymph. Individuals also have two distinct wing morphs, a short-winged flightless morph and a long-winged morph that has the ability to disperse. By manipulating the quality of diet over seven generations, we found that the reproductive investment of males and females were affected differently by the diet quality treatment and wing morph of the individual. We discuss the broader implications of these findings including the differences in how males and