Summary
Flight of male and female Mexican bean beetle adults was examined in laboratory tests. The experimental design made it possible to examine flight behavior not only with respect to different types of hosts (young vs senescent common bean foliage) but also with respect to effects due to their utilization during particular stages of beetle development. The median flight time of males was significantly affected by the adult host, but not by the juvenile host; whereas, the median flight time of females tended to be more affected by the juvenile than by the adult host. These different effects of hosts on the flight times of males and females resulted in sexual dimorphism in flight when the sexes were fed senescent foliage as adults. Although age significantly affected the flight time of both males and females, the reproductive status of females did not affect their flight times. The significance of these results are discussed with respect to the influence of the nutritional complexity of habitats on life history strategies and population dynamics.
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Saks, M.E., Rankin, M.A. & Stinner, R.E. Sexually differentiated flight responses of the Mexican bean beetle to larval and adult nutrition. Oecologia 75, 296–302 (1988). https://doi.org/10.1007/BF00378613
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DOI: https://doi.org/10.1007/BF00378613