Grupo de Investigacion de Biotecnologia Animal, Facultad de Ciencias, Universidad Nacional de Colombia, Medellin, Colombia.
J Biosci. 2013 Sep;38(3):549-60. doi: 10.1007/s12038-013-9332-9.
Habitat change in Rhodnius spp may represent an environmental challenge for the development of the species, particularly when feeding frequency and population density vary in nature. To estimate the effect of these variables in stability on development, the degree of directional asymmetry (DA) and fluctuating asymmetry (FA) in the wing size and shape of R. prolixus and R. robustus-like were measured under laboratory controlled conditions. DA and FA in wing size and shape were significant in both species, but their variation patterns showed both inter-specific and sexual dimorphic differences in FA of wing size and shape induced by nutrition stress. These results suggest different abilities of the genotypes and sexes of two sylvatic and domestic genotypes of Rhodnius to buffer these stress conditions. However, both species showed non-significant differences in the levels of FA between treatments that simulated sylvan vs domestic conditions, indicating that the developmental noise did not explain the variation in wing size and shape found in previous studies. Thus, this result confirm that the variation in wing size and shape in response to treatments constitute a plastic response of these genotypes to population density and feeding frequency.
栖息地的改变可能会对锥蝽属物种的发展构成环境挑战，特别是在自然界中，取食频率和种群密度发生变化时。为了评估这些变量在稳定性方面对发育的影响，在实验室控制条件下，测量了大锥蝽和类似粗壮锥蝽的翅膀大小和形状的方向不对称（DA）和波动不对称（FA）。两种物种的翅膀大小和形状的 DA 和 FA 均具有统计学意义，但它们的变化模式显示，营养胁迫引起的翅膀大小和形状的 FA 存在种间和性别二态性差异。这些结果表明，两种森林和家庭锥蝽基因型的基因型和性别的不同能力可以缓冲这些胁迫条件。然而，两种物种在模拟森林与家庭条件的处理之间的 FA 水平上均无统计学差异，表明发育噪声并不能解释先前研究中发现的翅膀大小和形状的变化。因此，该结果证实，对处理的翅膀大小和形状的变化构成了这些基因型对种群密度和取食频率的可塑性反应。
