Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Rafaela and Consejo Nacional de Investigaciones Científicas y Técnicas, CC 22, CP 2300, Rafaela, Santa Fe, Argentina.
Exp Appl Acarol. 2011 Apr;53(4):371-5. doi: 10.1007/s10493-010-9404-6. Epub 2010 Oct 23.
The fertility of hybrids from two distinct populations of Amblyomma cajennense from different ecological regions of Northern Argentina was analyzed. Two colonies of A. cajennense from El Rey National Park (RNP), Salta Province (24º41'S, 64º36'W), and Copo National Park (CNP), Santiago del Estero Province (25º55'S, 61º43'W) were established infesting rabbits with adults collected from vegetation. Reproductive parameters of the first generation in laboratory of each colony and their crosses were evaluated considering engorged weight of females, engorged period of females, pre-oviposition period of females, minimum egg incubation period, reproductive efficiency index [REI = number of eggs laid/weight of the females in mg], and fertility efficiency index [FEI = number of hatched larvae/weight of the females in mg]. Infestations were made as follows: Group 1) RNP males and females; Group 2) CNP males and females; Group 3) males from CNP and females from RNP; Group 4) males from RNP and females from CNP. The engorgement weight of the females from CNP that mated with males from RNP was significantly lighter than those of the engorged females obtained in the other 3 crosses, and the engorged period of the females from CNP that mated with males from RNP was significantly longer that the engorged period of the females belonging to the remaining groups. The females from group 3 and 4 had a FEI extremely low in comparison with the FEI obtained from the engorged females originated from the groups 1 and 2. Biological implication of these findings is discussed.
分析了来自阿根廷北部不同生态区的两个不同 Amblyomma cajennense 种群的杂种的生育能力。从萨尔塔省埃尔雷伊国家公园（24°41'S，64°36'W）和圣地亚哥德尔埃斯特罗省科波国家公园（25°55'S，61°43'W）的两个 A. cajennense 殖民地用从植被中收集的成年个体来感染兔子。在每个殖民地的实验室中评估了第一代的繁殖参数及其杂交种，考虑了雌性的饱食体重、雌性的饱食期、雌性的产卵前期、最小卵孵化期、繁殖效率指数[REI=产卵数/雌性体重以毫克计]和生育效率指数[FEI=孵化幼虫数/雌性体重以毫克计]。进行了以下感染：组 1）RNP 雄性和雌性；组 2）CNP 雄性和雌性；组 3）CNP 雄性和 RNP 雌性；组 4）RNP 雄性和 CNP 雌性。与来自 RNP 的雄性交配的 CNP 雌性的饱食体重明显轻于其他 3 个杂交种中获得的饱食雌性，而与来自 RNP 的雄性交配的 CNP 雌性的饱食期明显长于属于其余组的雌性的饱食期。与来自组 1 和 2 的雌性相比，来自组 3 和 4 的雌性的 FEI 极低。讨论了这些发现的生物学意义。
