UZH-Logo

Maintenance Infos

Solute and particle retention in the digestive tract of the Phillip's dikdik (Madoqua saltiana phillipsi), a very small browsing ruminant


Hebel, C. Solute and particle retention in the digestive tract of the Phillip's dikdik (Madoqua saltiana phillipsi), a very small browsing ruminant. 2011, University of Zurich, Vetsuisse Faculty.

Abstract

Morphological characteristics of the forestomach and reports of the natural diet suggest that dikdiks should have a ‘moose-type’ forestomach physiology with a low degree of selective particle retention. This assumption was tested in feeding experiments with 12 adult Phillip’s dikdiks (Madoqua saltiana phillipsi) on 3 different intake levels, using cobalt-EDTA as a solute marker and a conventional chromium-mordanted fibre (< 2mm; mean particle size 0.63mm) as particle marker. Body mass had no influence on retention time (RT) whereas food intake level clearly had. Drinking water intake was not related to solute marker RT. The particle marker was retained distinctively longer than the solute marker. Comparisons with results in larger ruminants and with faecal particle sizes measured in dikdiks suggested that the particle marker was above the critical size threshold, above which particle delay in the forestomach is not only due to selective particle retention, but additionally due to the ruminal particle sorting mechanism. A second study with a marker of a lower mean particle size (0.17mm) resulted in particle and fluid RT similar to those in other ‘moose-type’ ruminants. Even this smaller particle marker yielded RT that were longer than those predicted by allometric equations based on quarter-power scaling, providing further support for observations that small ruminants generally achieve longer RT and higher digestive efficiencies than expected based on their body size.

Morphological characteristics of the forestomach and reports of the natural diet suggest that dikdiks should have a ‘moose-type’ forestomach physiology with a low degree of selective particle retention. This assumption was tested in feeding experiments with 12 adult Phillip’s dikdiks (Madoqua saltiana phillipsi) on 3 different intake levels, using cobalt-EDTA as a solute marker and a conventional chromium-mordanted fibre (< 2mm; mean particle size 0.63mm) as particle marker. Body mass had no influence on retention time (RT) whereas food intake level clearly had. Drinking water intake was not related to solute marker RT. The particle marker was retained distinctively longer than the solute marker. Comparisons with results in larger ruminants and with faecal particle sizes measured in dikdiks suggested that the particle marker was above the critical size threshold, above which particle delay in the forestomach is not only due to selective particle retention, but additionally due to the ruminal particle sorting mechanism. A second study with a marker of a lower mean particle size (0.17mm) resulted in particle and fluid RT similar to those in other ‘moose-type’ ruminants. Even this smaller particle marker yielded RT that were longer than those predicted by allometric equations based on quarter-power scaling, providing further support for observations that small ruminants generally achieve longer RT and higher digestive efficiencies than expected based on their body size.

Downloads

256 downloads since deposited on 08 Jan 2012
56 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Dissertation
Referees:Clauss M
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Small Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:2011
Deposited On:08 Jan 2012 14:09
Last Modified:05 Apr 2016 15:19
Number of Pages:13
Additional Information:Publiziert in und Sonderdruck aus: Comp Biochem Physiol A Mol Integr Physiol. 2011 Jul;159(3):284-290.
Related URLs:http://opac.nebis.ch/F/?local_base=EBI01&con_lng=GER&func=find-b&find_code=090&request=001995542
http://opac.nebis.ch/F/?local_base=NEBIS&CON_LNG=GER&func=find-b&find_code=SYS&request=006592974
Permanent URL: https://doi.org/10.5167/uzh-54245

Download

[img]
Preview
Filetype: PDF
Size: 893kB

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations