Albers Melissa A, Bradley Timothy J
Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA.
Physiol Biochem Zool. 2006 Sep-Oct;79(5):857-65. doi: 10.1086/506002. Epub 2006 Aug 18.
Life-history trade-offs of populations of Drosophila melanogaster selected for enhanced desiccation resistance (D populations) include increased pupal mortality, retarded development, increased longevity, and decreased fecundity. We tested the effects of acute desiccation on fecundity and the effects of various nutritional regimes on fecundity following a bout of desiccation in the D populations and their control populations (C populations). Female flies were desiccated for 8 h (C populations) or 24 h (D populations) and then recovered on one of four treatments: distilled water, a saline solution, a saline and sucrose solution, or food. Each treatment was tested in the presence and absence of a yeast supplement. Fecundity was then measured on an oviposition medium over a 12-h period. Fecundity was also measured in flies that did not undergo a desiccation stress. Yeast increased fecundity under all conditions examined in the C populations but not in the D populations. There was an overall effect of recovery treatment on fecundity but no effect of desiccation stress.
为增强抗干燥能力而选育的黑腹果蝇种群（D种群）的生活史权衡包括蛹期死亡率增加、发育迟缓、寿命延长和繁殖力下降。我们测试了急性干燥对繁殖力的影响，以及在D种群及其对照种群（C种群）经历一轮干燥后，各种营养方案对繁殖力的影响。雌性果蝇干燥8小时（C种群）或24小时（D种群），然后在四种处理之一上恢复：蒸馏水、盐溶液、盐和蔗糖溶液或食物。每种处理在有和没有酵母补充剂的情况下进行测试。然后在12小时内，在产卵培养基上测量繁殖力。还测量了未经历干燥胁迫的果蝇的繁殖力。在C种群中检测的所有条件下，酵母都能提高繁殖力，但在D种群中则不然。恢复处理对繁殖力有总体影响，但干燥胁迫没有影响。
