麦岩螨实验种群繁殖特征生命表的比较研究

Comparative studies of the reproduction-specifity life table on the population of Petrobia latens (Muller) (Acari: Tetranychidae)

对产两种不同卵的麦岩螨的实验种群在六种温度下的繁殖特征生命表进行了研究,温度降低,可诱发麦岩螨产活性卵,延长产活性卵成螨的寿命。同一温度对于卵、幼螨的存活率影响较大,而对于若螨影响则很小。同一螨态,存活率与温度呈二次曲线关系,在所实验温度条件下,产活性卵的γ_m值都要比产滞育卵的γ_m值大,而且,随着温度的降低,两者比值有增加的趋势。

We studied (1987-88) the reproduction-specifity life table on lab population of Petrobia latens (Muller) that lay two kinds of eggs, and also built 12 groups of life tables at six temperatures. Results are summaried as follows: Temperature had different effects on the life span, number of oviposition of the female laying two kinds of eggs, survival rate, and duration of immature stages. Low temperature greatly prolonged the life span of female laying active eggs, and induced P. latens to lay active eggs; whereas low temperature slightly prolonged the life span of the female laying diapausing eggs, and was unfavorable for P. latens to lay diapausing eggs. Greater influence was on the eggs and larvae than on nymph at the same temperature. At the same stage, parabola relation is assumed between the survival rate and temperature. The γm values of the population laying active eggs were higher than those of the population laying diapausing eggs at all experimental temperatures, that is, the increasing potency of the population laying active eggs was greater than that laying diapausing eggs, and the potency tended to increase as temperature came down.