Canals M, Cattan P E, Ehrenfeld M
Universidad de Chile, Facultad de Ciencias Veterinarias, Departamento Ciencias Biológicas, Santiago de Chile.
Rev Med Chil. 1994 Sep;122(9):993-7.
Triatoma infestans is an insect with a high colonization capacity, capable of maintaining populations near saturation levels in different environments. However, it has a great lability in its population parameters when exposed to variable environmental conditions. The aim of this work was to explore the response of two cohorts with 4 initial egg densities, in two environmental conditions ("shelter" at 24 +/- 2.7 degrees C and 73 +/- 7% of relative humidity and "room" at 16.9 +/- 2.1 degrees C and 69.8 +/- 5% of relative humidity), similar to those commonly found in houses at Santiago, Chile. The proportion of fertile egg was higher in shelter conditions (93.7 vs 74.6%). Survival curves were similar in both environments and mortality was not influenced by density or maturity of individuals. Maturation was retarded in both environment, specially in the colder one, compared to constant environments. It is concluded that maturation of T infestans is the most affected parameter in the unprotected environment. Even though, considering the insect's longevity, its reproductive function is probably accomplished. The great lability of T. infestans population parameters, suggests that the finding of favorable microenvironments is essential for their survival.
骚扰锥蝽是一种具有高定殖能力的昆虫，能够在不同环境中使种群维持在接近饱和的水平。然而，当暴露于可变的环境条件下时，其种群参数具有很大的不稳定性。本研究的目的是探讨在两种环境条件下（“庇护所”，温度为24±2.7℃，相对湿度为73±7%；“房间”，温度为16.9±2.1℃，相对湿度为69.8±5%），具有4种初始卵密度的两个同龄组的反应，这两种环境条件类似于智利圣地亚哥房屋中常见的环境。在庇护所条件下，可育卵的比例更高（93.7%对74.6%）。两种环境中的生存曲线相似，死亡率不受个体密度或成熟度的影响。与恒定环境相比，在这两种环境中，尤其是在较冷的环境中，成熟过程都延迟了。得出的结论是，在无保护的环境中，骚扰锥蝽的成熟是受影响最大的参数。尽管如此，考虑到这种昆虫的寿命，其生殖功能可能已经完成。骚扰锥蝽种群参数的巨大不稳定性表明，找到有利的微环境对其生存至关重要。
