Krafsur E S, Moon R D, Kim Y
Department of Entomology, Iowa State University, Ames 50011, USA.
J Med Entomol. 1995 Sep;32(5):685-96. doi: 10.1093/jmedent/32.5.685.
Pterins in face flies, Musca autumnalis DeGeer, were measured spectrofluorimetrically to estimate the chronological ages of adults in natural summer populations. The age distributions showed a systematic undersampling of young males. Exponential, Gompertz, and Weibull models were fitted to the age distributions. A 1-parameter exponential model suggested mean daily survival rates of 0.83 for female face flies, and a mean life expectation of 5.5 d. But the Weibull model best fit the age distributions, providing mean life expectations of 10.1 and 11 d for males and females, respectively. Ovarian dynamics were examined with respect to chronological age and delays were detected in vitellogenesis and oviposition. Face fly populations seemed to reproduce at less than the maximum rate allowed by prevailing temperatures, at which it was estimated that an average female would undergo 2.2 ovarian cycles and have a lifetime fecundity of 28.5 female progeny.
通过荧光分光光度法测定了秋家蝇（Musca autumnalis DeGeer）中的蝶呤含量，以估计自然夏季种群中成年家蝇的实际年龄。年龄分布显示年轻雄性存在系统性的抽样不足。将指数模型、冈珀茨模型和威布尔模型拟合到年龄分布上。单参数指数模型表明，雌性秋家蝇的日均存活率为0.83，平均预期寿命为5.5天。但威布尔模型最适合该年龄分布，分别给出了雄性和雌性家蝇的平均预期寿命为10.1天和11天。研究了卵巢动态与实际年龄的关系，并在卵黄发生和产卵过程中检测到延迟。秋家蝇种群的繁殖速度似乎低于当时温度所允许的最大速度，据估计，平均每只雌性家蝇会经历2.2个卵巢周期，一生的繁殖力为28.5只雌性后代。
