Schiemer Fritz, Duncan Annie
Limnologische Lehrkanzel der Universität Wien, Wien, Austria.
Zoology Department, Royal Holloway College, University of London, London, England.
Oecologia. 1974 Jun;15(2):121-126. doi: 10.1007/BF00345740.
Tobrilus gracilis (Bastian) was found to live predominantly in oxygen deficient mud layers of Neusiedlersee, Austria. The O-consumption of all active life stages was measured with Cartesian diver respirometers. The respiration-body weight regression (R=aW ; in μl O·10/individual·h and μg wet weight) was calculated to be R=0.522 W . This suggests that the species is not obligatory anaerobic but can use oxygen when available. Furthermore, a respiration-body weight regression was calculated for four other nematodes from a wide range of habitats using literature data. The regression coefficients ranged from 0.68-0.85 but were not significantly different (P=0.05). The intercept of the y-axis ("a" in the regression equation), which indicates the metabolic rate of a species, ranged from 1.34-2.01 μl·10 O/individual·h at 20°C. Covariance analysis was used to test the differences in the level of metabolic activity for Tobrilus gracilis, Aphelenchus avenae and Panagrolaimus rigidus. It could be shown, that oxygen consumption of Tobrilus is significantly lower compared with the other species and it is concluded that the metabolism of this species is partially anaerobic, even when oxygen is available.
细弱托布线虫（巴斯蒂安）主要生活在奥地利新锡德尔湖缺氧的泥层中。使用笛卡儿潜水式呼吸计测量了所有活跃生命阶段的耗氧量。计算出呼吸-体重回归方程（R = aW；单位为μl O·10/个体·小时和μg湿重）为R = 0.522W。这表明该物种并非专性厌氧，而是在有氧气时能够利用氧气。此外，利用文献数据计算了来自广泛生境的其他四种线虫的呼吸-体重回归方程。回归系数范围为0.68 - 0.85，但差异不显著（P = 0.05）。y轴截距（回归方程中的“a”）表示物种的代谢率，在20°C时范围为1.34 - 2.01 μl·10 O/个体·小时。使用协方差分析来测试细弱托布线虫、燕麦真滑刃线虫和硬皮拟丽突线虫代谢活动水平的差异。结果表明，与其他物种相比，细弱托布线虫的耗氧量显著更低，得出结论，即使有氧气存在，该物种的代谢也是部分厌氧的。
