Noireau F, Flores R, Gutierrez T, Abad-Franch F, Flores E, Vargas F
Institut de Recherche pour le Développement (IRD), France.
Trans R Soc Trop Med Hyg. 2000 Jan-Feb;94(1):23-7. doi: 10.1016/s0035-9203(00)90426-7.
A survey of natural ecotopes of Triatoma infestans dark morph and other triatomine sylvatic species was performed in an uninhabited area of the Bolivian Chaco. Among the 321 triatomines collected by light trapping, only 4 T. infestans dark morph specimens were identified. Predominant flying species were T. guasayana and T. sordida group 2 (51.7% and 37.1% of capture, respectively). The same species prevailed in terrestrial and epiphytic bromeliads where scarce T. infestans dark morph nymphal instars were also detected. In parrot nests T. delpontei prevailed broadly over other species (90.2% of the capture) and only 4 T. infestans dark morph adults were collected. In contrast, T. infestans dark morph was the predominant species captured in hollow trees (46.0% of the total collected). The abundance of immature forms (88.2% of the collection) shows that hollow trees constitute a favourable ecotope for this species. Of the 421 trees investigated, 33.7% were positive for triatomines. T. infestans dark morph, found inside 15.0% of them, also had higher apparent density than other species (average number of T. infestans in positive trees, 2.0 +/- 1.6 vs 1.3 +/- 0.6 for other species). Light trapping seems to be an efficient method to sample the T. sordida-T. guasayana complex in that it shows a similar distribution to that observed in natural ecotopes; however, this method is ineffective for the assessment of the local abundance of T. infestans dark morph.
在玻利维亚查科的一个无人居住地区，对侵袭锥蝽深色形态及其他锥蝽野生种类的自然生态环境进行了调查。在通过灯光诱捕收集的321只锥蝽中，仅鉴定出4只侵袭锥蝽深色形态标本。主要的飞行种类是瓜氏锥蝽和污色锥蝽第2组（分别占捕获量的51.7%和37.1%）。在陆生和附生凤梨科植物中同样是这些种类占优势，在那里也检测到了稀少的侵袭锥蝽深色形态若虫。在鹦鹉巢中，德尔庞锥蝽比其他种类占比大得多（占捕获量的90.2%），仅收集到4只侵袭锥蝽深色形态成虫。相比之下，侵袭锥蝽深色形态是在空心树中捕获的主要种类（占总捕获量的46.0%）。未成熟形态的大量存在（占收集量的88.2%）表明空心树是该种类适宜的生态环境。在所调查的421棵树中，33.7%的树检测出锥蝽呈阳性。在其中15.0%的树中发现的侵袭锥蝽深色形态，其表观密度也高于其他种类（阳性树中侵袭锥蝽的平均数量为2.0±1.6，其他种类为1.3±0.6）。灯光诱捕似乎是对污色锥蝽 - 瓜氏锥蝽复合体进行采样的有效方法，因为它显示出与在自然生态环境中观察到的分布相似；然而，这种方法对于评估侵袭锥蝽深色形态的局部丰度无效。
