[ Objective] The paper was to find out the difference in oxygen consumption between Clethrionomys rufocanus and Apodemus agrarius. [ Method] The oxygen consumption value of C. rufocanus and A. agrarius was measured us...[ Objective] The paper was to find out the difference in oxygen consumption between Clethrionomys rufocanus and Apodemus agrarius. [ Method] The oxygen consumption value of C. rufocanus and A. agrarius was measured using improved closed pressure breathing apparatus, and the oxygen consumption rate was calculated. [ Result] The oxygen consumption of C. rufocanus and A. agrarius increased with the increasing body weight, while the increase amplitude ofA. agrarius was relatively smaller. The oxygen consumption rate decreased with the increasing body weight. [ Conclusion] The result provides a biological basis for breeding and research of experimental rats.展开更多
The diurnal activity rhythm of Clethrionomys rufocanus was studied under three different food conditions in a laboratory. The activity occurred both in the daytime and at night, but mainly at night (19∶00～4∶00). Th...The diurnal activity rhythm of Clethrionomys rufocanus was studied under three different food conditions in a laboratory. The activity occurred both in the daytime and at night, but mainly at night (19∶00～4∶00). The mice fed with Mouse food exhibited six small peaks in their daily activity, and those fed with grass or hay exhibited seven, but the peak of the out nest night activity was 2～3 hours earlier.The activity amount of out nest was 30 518.0 ±3 694.9 s for those fed with grass, the next was 21 811.7± 2 288.0 s for those fed with hay, and the least was 15 038.0±666.0 s for those fed with mouse food. The activity amount of feeding was 10 867.3±1 612.1 s for those fed with grass, much more than those fed with mouse food and hay. The activity amount for drinking was 988.5±79.1 s (fed with hay),568.9±60.9 s (fed with mouse food) and 139.3±47.2 s (fed with grass).展开更多
Grey-sided voles(Myodes rufocanus)and bank voles(Myodes glareolus)co-exist in boreal forests in northern Scandinavia.Previous studies suggest that the 2 species interact interspecifically,the grey-sided vole be&...Grey-sided voles(Myodes rufocanus)and bank voles(Myodes glareolus)co-exist in boreal forests in northern Scandinavia.Previous studies suggest that the 2 species interact interspecifically,the grey-sided vole being the dominant species.We tested the hypothesis that bank voles shift their diet due to competition with the dominant grey-sided vole by studying stable isotope ratios in both species.Muscle samples were taken from voles in patches of old forest occupied by only bank voles and patches of old forest occupied by both grey-sided voles and bank voles.We found that:(i)stable isotope ratios of bank voles differed in areas with and without grey-sided voles;and that(ii)the stable isotope ratios of bank voles were more similar to those of grey-sided voles in areas where grey-sided voles were absent.Our data suggests that grey-sided voles forced bank voles to change their diet due to interspecific competition.展开更多
基金Supported by Science and Technology Innovation Team Projects of Colleges and Universities in Heilongjiang Province(Collapse Mechanism and Control Technology Research of Forest Rodent Population)Rodent Fauna in Mudanjiang Sandaoguan Forest Farm and Their Harms on Agriculture and Forestry(yjsxscx2015-12mdjnu)
文摘[ Objective] The paper was to find out the difference in oxygen consumption between Clethrionomys rufocanus and Apodemus agrarius. [ Method] The oxygen consumption value of C. rufocanus and A. agrarius was measured using improved closed pressure breathing apparatus, and the oxygen consumption rate was calculated. [ Result] The oxygen consumption of C. rufocanus and A. agrarius increased with the increasing body weight, while the increase amplitude ofA. agrarius was relatively smaller. The oxygen consumption rate decreased with the increasing body weight. [ Conclusion] The result provides a biological basis for breeding and research of experimental rats.
文摘The diurnal activity rhythm of Clethrionomys rufocanus was studied under three different food conditions in a laboratory. The activity occurred both in the daytime and at night, but mainly at night (19∶00～4∶00). The mice fed with Mouse food exhibited six small peaks in their daily activity, and those fed with grass or hay exhibited seven, but the peak of the out nest night activity was 2～3 hours earlier.The activity amount of out nest was 30 518.0 ±3 694.9 s for those fed with grass, the next was 21 811.7± 2 288.0 s for those fed with hay, and the least was 15 038.0±666.0 s for those fed with mouse food. The activity amount of feeding was 10 867.3±1 612.1 s for those fed with grass, much more than those fed with mouse food and hay. The activity amount for drinking was 988.5±79.1 s (fed with hay),568.9±60.9 s (fed with mouse food) and 139.3±47.2 s (fed with grass).
基金the anonymous reviewers for their constructive comments.Financial support was received from stiftelsen Oscar och Lili Lamms minne,from Helge Ax:son Johnsons stiftelse and from the Swedish Research Council FORMAS(Dnr 2017-00867).
文摘Grey-sided voles(Myodes rufocanus)and bank voles(Myodes glareolus)co-exist in boreal forests in northern Scandinavia.Previous studies suggest that the 2 species interact interspecifically,the grey-sided vole being the dominant species.We tested the hypothesis that bank voles shift their diet due to competition with the dominant grey-sided vole by studying stable isotope ratios in both species.Muscle samples were taken from voles in patches of old forest occupied by only bank voles and patches of old forest occupied by both grey-sided voles and bank voles.We found that:(i)stable isotope ratios of bank voles differed in areas with and without grey-sided voles;and that(ii)the stable isotope ratios of bank voles were more similar to those of grey-sided voles in areas where grey-sided voles were absent.Our data suggests that grey-sided voles forced bank voles to change their diet due to interspecific competition.
