共查询到2条相似文献，搜索用时 0 毫秒
1.
Discrimination between conspecific and heterospecific signals is a key element in the evolution of pheromone-mediated communication in insects. Pheromone antagonists prevent heterospecific attraction. They are typically pheromone synergists in other species and enable specific communication in closely related species, using partly the same chemicals. In codling moth, Cydia pomonella, as in other moths, upwind flights to a pheromone/antagonist blend were slower and more convoluted than to pheromone. However, this deteriorated flight behaviour did not account for the strong decrease in male attraction. The pheromone/antagonist blend blocked instead the onset of upwind flight. This was corroborated by placing a separate source of pheromone close by, which restored male attraction. Males flying upwind did not discriminate between pheromone and the adjacent pheromone/antagonist blend, and landed on either source. This indicates differences in the neural regulation for initiating and maintaining a behavioural response to pheromone. 相似文献
2.
There is great potential for conflict within social insect colonies especially when there are multiple inseminated females
laying eggs. One reason that conflict is not always realized may be that these females do not identify their own progeny and
direct their attentions preferentially towards them. Using DNA microsatellite loci we were able to determine exactly which
female was the mother of each larva in eight nests of the social wasp, Polistes carolina. Using 26 h of videotapes of natural nests we observed 2,093 feedings of specific larvae by these adults and found that they
did not preferentially feed their own progeny. Instead feedings were distributed to progeny as predicted based on their frequency
in the nest. The absence of nepotism towards closest kin within colonies in this system is likely to promote colony harmony.
Received: 24 January 2000 / Accepted in revised form: 30 March 2000 相似文献
