Methane Output of Tortoises: Its Contribution to Energy Loss Related to Herbivore Body Mass
Methane Output of Tortoises: Its Contribution to Energy Loss Related to Herbivore Body Mass
复制标题
陆龟的甲烷输出：其对与草食动物体重相关的能量损失的贡献
作者：
R. Franz;C. Soliva;M. Kreuzer;J. Hatt;S. Furrer;J. Hummel;M. Clauss
体重（M）的增加传统上被认为有利于食草动物的消化效率。然而，最近在哺乳动物中描述了随着M的增加而增加的甲烷损失。为了在非哺乳类食草动物中测试这种模式，我们用24只不同种类的陆龟（M范围为0.52-180 kg）进行了饲养试验，这些陆龟自由采食干草和沙拉。连续30天测量的平均每日干物质和总能量摄入量分别按比例调整至M0.75（95%CI 0.64-0.87）和M0.77（95%CI 0.66-0.88）。在呼吸室中连续两天测量甲烷产生量，并按比例缩放至M1.03（95%CI 0.84-1.22）。当表示为每总能量摄入的能量损失时，甲烷损失缩放至0.70（95%CI 0.47-1.05）M0.29（95%CI 0.14-0.45）。该标度的置信区间与非反刍哺乳动物0.79（95%CI 0.63-0.99）M0.15（95%CI 0.09-0.20）计算的置信区间重叠，但低于反刍动物。非反刍类哺乳动物和陆龟之间的相似性表明，在外温动物和内温动物的肠道动物群的共同演变，并增加能量损失，由于甲烷生产与体重增加是一个一般的异速生长的原则，在食草动物。这些发现进一步证明了大体型本身并不一定具有消化优势的观点。
An increase in body mass (M) is traditionally considered advantageous for herbivores in terms of digestive efficiency. However, recently increasing methane losses with increasing M were described in mammals. To test this pattern in non-mammal herbivores, we conducted feeding trails with 24 tortoises of various species (M range 0.52–180 kg) fed a diet of grass hay ad libitum and salad. Mean daily dry matter and gross energy intake measured over 30 consecutive days scaled to M0.75 (95%CI 0.64–0.87) and M0.77 (95%CI 0.66–0.88), respectively. Methane production was measured over two consecutive days in respiration chambers and scaled to M1.03 (95%CI 0.84–1.22). When expressed as energy loss per gross energy intake, methane losses scaled to 0.70 (95%CI 0.47–1.05) M0.29 (95%CI 0.14–0.45). This scaling overlaps in its confidence intervals to that calculated for nonruminant mammals 0.79 (95%CI 0.63–0.99) M0.15 (95%CI 0.09–0.20), but is lower than that for ruminants. The similarity between nonruminant mammals and tortoises suggest a common evolution of the gut fauna in ectotherms and endotherms, and that the increase in energetic losses due to methane production with increasing body mass is a general allometric principle in herbivores. These findings add evidence to the view that large body size itself does not necessarily convey a digestive advantage.
DOI：
10.1111/j.1469-185x.2010.00137.x
发表时间：
2011-02
影响因子：
--
作者：
Sander PM;Christian A;Clauss M;Fechner R;Gee CT;Griebeler EM;Gunga HC;Hummel J;Mallison H;Perry SF;Preuschoft H;Rauhut OW;Remes K;Tütken T;Wings O;Witzel U
通讯作者：
Witzel U
DOI：
10.1007/bf00691047
发表时间：
1986-01-01
影响因子：
2
作者：
KARASOV, WH;PETROSSIAN, E;DIAMOND, JM
通讯作者：
DIAMOND, JM