Williams A E, Rose M R, Bradley T J
Department of Ecology and Evolutionary Biology, University of California, Irvine 92697, USA.
J Exp Biol. 1998 Nov;201(Pt 21):2945-52. doi: 10.1242/jeb.201.21.2945.
We conducted concurrent measurements of rates of CO2 and H2O release from individual fruit flies Drosophila melanogaster taken from populations subjected to three different selective regimes: (1) populations selected for resistance to desiccation (D flies); (2) populations maintained as their controls (C flies); and (3) the ancestral populations of the D and C populations (O flies). In the D flies, water loss rates were significantly reduced, the standard error of the regression (SER) of the CO2 release pattern measured over the survival period of the flies was increased, and the ratio of CO2 loss to H2O loss (VCO2/VH2O) was increased. Correlations across all 15 populations from the three selection treatments indicate that survival time was negatively correlated with water loss rate, positively correlated with the SER of CO2 release and positively correlated with the VCO2/VH2O ratio. We did not, however, find a significant correlation between the SER of CO2 release and rates of water loss or the VCO2/VH2O ratio.
（1）选择抗干燥的群体（D果蝇）；（2）作为对照维持的群体（C果蝇）；以及（3）D和C群体的祖先群体（O果蝇）。在D果蝇中，失水率显著降低，在果蝇存活期测量的二氧化碳释放模式的回归标准误差（SER）增加，并且二氧化碳损失与水损失的比率（VCO2/VH2O）增加。来自三种选择处理的所有15个群体的相关性表明，存活时间与失水率呈负相关，与二氧化碳释放的SER呈正相关，与VCO2/VH2O比率呈正相关。然而，我们没有发现二氧化碳释放的SER与失水率或VCO2/VH2O比率之间存在显著相关性。
