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Digestive physiology of the plains viscacha (Lagostomus maximus): A large herbivorous hystricomorph rodent
Zoo biology, 2015-07, Vol.34 (4), p.345-359
Hagen, Katharina B
Besselmann, Dorothea
Cyrus‐Eulenberger, Ulrike
Vendl, Catharina
Ortmann, Sylvia
Zingg, Robert
Kienzle, Ellen
Kreuzer, Michael
Hatt, Jean‐Michel
Clauss, Marcus
2015
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Hagen, Katharina B
Besselmann, Dorothea
Cyrus‐Eulenberger, Ulrike
Vendl, Catharina
Ortmann, Sylvia
Zingg, Robert
Kienzle, Ellen
Kreuzer, Michael
Hatt, Jean‐Michel
Clauss, Marcus
Titel
Digestive physiology of the plains viscacha (Lagostomus maximus): A large herbivorous hystricomorph rodent
Ist Teil von
Zoo biology, 2015-07, Vol.34 (4), p.345-359
Ort / Verlag
United States: A.R. Liss
Erscheinungsjahr
2015
Quelle
MEDLINE
Beschreibungen/Notizen
Plains viscachas (Lagostomus maximus) are large South American, fossorial rodents susceptible to diabetic cataracts. Various aspects of their digestive physiology were studied in three different experiments with nine male and seven female adult animals and six different diets (total n of feeding trials = 35). Viscachas achieved mean retention times of 23–31 hr, which is of a magnitude also recorded in horses; these did not differ for solute or small particle (<2 mm) markers. Secondary marker excretion peaks indicated coprophagy, and were rarer on high‐protein as compared to grass hay‐only diets. Mean resting metabolic rate was, at 229 kJ/kg⁰.⁷⁵/day, lower than expected for a mammal of this size. Digestible energy requirement for maintenance was 445 kJ/kg⁰.⁷⁵/day. At 1.6–2.7 L/day, viscachas produced more methane than expected for a hindgut fermenter of their size. On diets that included concentrate feeds, viscachas excreted glucose in their urine, corroborating reports on the susceptibility of this species for diabetes when kept on energy‐dense food. Viscachas had a similar apparent digestibility of protein, lipids, and macrominerals as other rodents, rabbits, or domestic horses. This suggests that whether or not a species practices coprophagy does not have a major influence on these measures. Viscachas resemble other hindgut fermenters in their high apparent calcium digestibility. With respect to a digestibility‐reducing effect of dietary fiber, viscachas differed from rabbits and guinea pigs but were similar to horses, suggesting that small body size needs not necessarily be linked to lower digestive efficiency on high‐fiber diets. Zoo Biol. 34:345–359, 2015. © 2015 Wiley Periodicals Inc.
Sprache
Englisch
Identifikatoren
ISSN: 0733-3188
eISSN: 1098-2361
DOI: 10.1002/zoo.21216
Titel-ID: cdi_proquest_miscellaneous_1722928384
Format
–
Schlagworte
adults
,
Animals
,
body size
,
calcium
,
cataract
,
colonic separation mechanism
,
coprophagy
,
diabetes
,
Diet - veterinary
,
dietary fiber
,
Dietary Fiber - metabolism
,
digestibility
,
digestible energy
,
digestible protein
,
digestive physiology
,
Digestive System Physiological Phenomena
,
Energy Metabolism - physiology
,
excretion
,
feeds
,
Female
,
females
,
fermenters
,
glucose
,
guinea pigs
,
herbivores
,
herbivory
,
high fiber diet
,
hindgut
,
horses
,
lipids
,
Male
,
males
,
methane
,
nutrition
,
obesity
,
rabbits
,
resting metabolic rate
,
Rodentia - physiology
,
solutes
,
urine
,
zoos
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