气候变化领域集成服务门户(CCPortal): Digestive anatomy; physiology; resting metabolism and methane production of captive maras (Dolichotis patagonum)

CCPortal

DOI	10.1016/j.cbpa.2019.05.023
	Digestive anatomy; physiology; resting metabolism and methane production of captive maras (Dolichotis patagonum)
	Clauss M.; Hagen K.B.; Frei S.; Ortmann S.; Lawrenz A.; Głogowski R.; Fritz J.; Flach E.; Kreuzer M.
发表日期	2019
ISSN	10956433
起始页码	82
结束页码	89
卷号	235
英文摘要	The digestive physiology of maras (Dolichotis patagonum)has not been investigated in detail. Maras have a particular limb anatomy facilitating a unique cursoriality among rodents. This may also have led to additional adaptations such as a reduced volume of the gastrointestinal tract. We performed macroanatomical measurements of, and determined mean particle size along, the digestive tract of 10 semi-free-ranging animals (7.04 ± 1.05 kg). Additionally, we measured CH4 emission in five captive animals (7.67 ± 0.98 kg)fed a diet of pelleted lucerne, and measured food intake, digestibility, and digesta mean retention time (MRT)of a solute and three particle markers (fed at <2, 10 and 20 mm particle size). The digestive tract contents represented 11.1 ± 1.4% of body mass, similar to other mammals and rodents, and there was slight indication of selective small particle retention in the caecum. Secondary peaks in marker elimination patterns suggested the possibility of caecotrophy. The MRTs were 15.4 h for the solute and 13.6 h, 13.3 h and 13.3 h for the three particle markers, respectively. At a dry matter intake of 61 ± 12 g kg body mass-0.75 d−1, the maras digested organic matter and neutral detergent fibre to 48 ± 8% and 34 ± 10%, respectively, which is in the lower range of results from horses fed on a diet with a similar fibre content. The respiratory quotient (CO2/O2)was 0.93 ± 0.03, the resting metabolic rate 346 ± 35 kJ kg body mass-0.75 d−1, and CH4 emissions averaged at 3.85 ± 0.47 L d−1 and 14.5 ± 5.2 L per kg dry matter intake; this at a CH4/CO2 ratio of 0.042 ± 0.004. Thus, the methane yield was of a magnitude expected for a hypothetical ruminant of this body mass. The results are consistent with the general understanding of hystricomorph rodent digestive physiology, including caecotrophy, but do not indicate a reduction of digestive capacity to support cursoriality. These results, and those obtained from other hystricomorph rodents, suggest that CH4 production may be more prominent in rodents than previously thought. Elsevier Inc.
英文关键词	Digestibility; Hystricomorpha; Mean retention time; Resting metabolic rate; Rodentia
scopus关键词	carbon dioxide; detergent; methane; organic matter; oxygen; methane; adaptation; adult; animal experiment; Article; body mass; cecum; dietary fiber; digestion; digestive function; Dolichotis patagonum; female; food intake; gastrointestinal tract; male; mammal; nonhuman; particle size; rectum; respiratory quotient; resting metabolic rate; retention time; rodent; solute; stomach; animal; biosynthesis; eating; genetics; metabolism; rodent; Animals; Dietary Fiber; Digestion; Digestive System Physiological Phenomena; Eating; Gastrointestinal Tract; Methane; Rodentia
来源期刊	Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176361
作者单位	Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Switzerland; Leibniz Instiute for Zoo and Wildlife Research (IZW), Berlin, Germany; Zoological Garden Wuppertal, Germany; Department of Animal Breeding, Faculty of Animal Sciences, Warsaw University of Life Sciences (WULS-SGGW), Warsaw, Poland; Wildlife Health Services, Zoological Society of London, United Kingdom; ETH Zurich, Institute of Agricultural Sciences, Zurich, Switzerland
推荐引用方式 GB/T 7714	Clauss M.,Hagen K.B.,Frei S.,et al. Digestive anatomy; physiology; resting metabolism and methane production of captive maras (Dolichotis patagonum)[J],2019,235.
APA	Clauss M..,Hagen K.B..,Frei S..,Ortmann S..,Lawrenz A..,...&Kreuzer M..(2019).Digestive anatomy; physiology; resting metabolism and methane production of captive maras (Dolichotis patagonum).Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology,235.
MLA	Clauss M.,et al."Digestive anatomy; physiology; resting metabolism and methane production of captive maras (Dolichotis patagonum)".Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology 235(2019).