成虫期长于幼期的昆虫实验种群生殖力表参数估计模型的改进

针对昆虫的某些类群成虫期长于幼期的实际情况,利用矩阵建立了内禀增长力估计的改进型模型,使得因成虫期过长而引起的世代重叠情况下,子孙后代在母代成虫存活期内的繁殖量得到表达.对成虫期远长于幼期而引发的当代成虫生殖期间,出现的世代重叠和生殖量进行估计,使得内禀增长力rm的计算与实际较为吻合.经rm的精确值估计模型的验算,证明新模型比原模型在估计rm值时,更加接近精确值.

Improvement upon the parameter estimation models of the fecundity table of insect experimental population when adult period longer than that of larva

The adult periods of some insect groups are longer than that of the larva. This fact often causes the generation overlap and the estimation of the intrinsic rate of increase (rm) become difficult. An improved model was established to estimate the parameters of the fecundity table of experimental population of these insects according to the matrix principle. This improved model enabled the number of offspring's propagation be calculated during the survival period of female adult of the former generation. The results showed that rm of the insects whose generations overlap significantly could be calculated successfully through the model. According to the checking computations, the rm value calculated from this improved model was more closely to the exact value than that of calculated from the un-improved model.