Life History and Population Consequences of Density, Photo-Period, and Temperature in a Migrant Insect, the Milkweed Bug Oncopeltus

摘要: Density, photoperiod, and temperature exert profound effects on the life history population growth of Oncopeltus. High temperature, long low density result in earlier onset reproduction, negatively skewed egg curves, hence greater rates increase. Values or r (intrinsic rate natural increase) vary from .0861 a 16-hr day at 27⚬C with 10 pairs per container to .0369 12-hr 23⚬C 20 pairs. When is low, length increases partial compensation for suppressed reproduction. Photoperiod their influence only after adult eclosion, while acts directly all stages regulate development. The responses phenotype environmental parameters studied are positive adaptations migrant insect such as It enters an essentially empty universe spring, when increasing temperatures rising. fact that these factors...