Modelling urinary purine derivatives excretion as a tool to estimate microbial rumen outflow in alpacas (Vicugna pacos)

dc.contributor.authorOrellana-Boero, P.
dc.contributor.authorSeradj, Ahmad Reza
dc.contributor.authorFondevila, Manuel
dc.contributor.authorNolan, John
dc.contributor.authorBalcells Terés, Joaquim
dc.date.accessioned2019-12-12T11:49:02Z
dc.date.available2019-12-12T11:49:02Z
dc.date.issued2012-10
dc.date.updated2019-12-12T11:49:05Z
dc.description.abstractThree experiments were carried out to establish a model to estimate the forestomach microbial yield based on the urinary excretion of purine derivatives (PD: allantoin, uric acid, xanthine and hypoxantine) in alpacas (Vicugna pacos). In Experiment 1, endogenous PD excretion was measured in two fasted adult male alpacas for seven consecutive days. Daily urinary PD excretion (mu mol/kg BW0.75) decreased during fasting to a minimum value of 194.8 (s.e. 18.4), ranging from 215.3 to 174.3. In Experiment 2, the relationship between purine bases (PB) input and urinary PD output was defined in two alpacas fitted with an infusion catheter at the terminal third compartment of the forestomach (C3). Animals were fed alfalfa hay at a maintenance level, and four RNA-doses (4.2, 8.3, 12.5 and 16.6 mmol PB/day: RNA from Torula yeast) were continuously infused at random into the C3 in four successive 120 h-periods. Urinary recovery of C3 infused purines averaged 0.615 (s.e. 0.0006) mmol/day. In Experiment 3, urinary PD response to levels of feed intake corresponding to 100, 75, 50 and 20% of the previous voluntary intake was evaluated. The amount of PD excretion in urine increased linearly (r = 0.867) with digestible organic matter intake (DOMI). and the slope of the regression (16.7 mmol PD/kg DOMI) can be assumed as an index of microbial yield.
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1016/j.smallrumres.2012.04.006
dc.identifier.idgrec019303
dc.identifier.issn0921-4488
dc.identifier.urihttp://hdl.handle.net/10459.1/67712
dc.language.isoeng
dc.publisherElsevier
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1016/j.smallrumres.2012.04.006
dc.relation.ispartofSmall Ruminant Research, 2012, vol. 107, num. 2-3, p. 101-104
dc.rightscc-by-nc-nd, (c) Elsevier, 2012
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectPurine derivatives
dc.subjectMicrobial protein
dc.subjectCamelids
dc.titleModelling urinary purine derivatives excretion as a tool to estimate microbial rumen outflow in alpacas (Vicugna pacos)
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
019303.pdf
Size:
586.73 KB
Format:
Adobe Portable Document Format
Description:
Postprint
License bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description: