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Here, we performed a similar experiment with five caecum\u2010cannulated horses (562\u2009\u00b1\u200931\u2009kg) fed a constant amount (6.81\u2009kg dry matter\/day) of grass hay. Passage markers representing the liquid (Co\u2010EDTA) as well as the particulate digesta phase (Yb\u2014undefined; Cr mordanted fibre 1\u22122\u2009mm; Ce\u2010mordanted fibre 8\u2009mm) were given as a pulse\u2010dose into the cannula to measure their mean retention times (MRT). The MRTs were compared by repeated\u2010measurements analysis of variance. The MRT in the hindgut was 22.2\u2009\u00b1\u20092.4\u2009h for Co, 25.0\u2009\u00b1\u20093.4\u2009h for Yb, 26.2\u2009\u00b1\u20091.6\u2009h for Cr and 26.3\u2009\u00b1\u20091.5\u2009h for Ce. Whereas differences between the particle marker MRTs were not significant (<jats:italic>p<\/jats:italic><jats:sub>adj.\u2009<\/jats:sub>&gt;\u20090.05), significant differences were observed between the solute marker Co and each of the particle markers Cr and Ce (<jats:italic>p<\/jats:italic><jats:sub>adj.\u2009<\/jats:sub>&lt;\u20090.009). The results confirm the well\u2010known significant, albeit small, difference in MRT in horses between the fluid and the particle digesta phase, and corroborate another recent study that used a combination of whole, marked hay and individual marker analysis in different particle size fractions of the faeces, which also did not detect a selective retention of any particle size class.<\/jats:p>","DOI":"10.1111\/jpn.13757","type":"journal-article","created":{"date-parts":[[2022,7,27]],"date-time":"2022-07-27T09:52:07Z","timestamp":1658915527000},"page":"1356-1363","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["No size\u2010dependent net particle retention in the hindgut of horses"],"prefix":"10.1111","volume":"106","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5750-2111","authenticated-orcid":false,"given":"Angela","family":"Schwarm","sequence":"first","affiliation":[{"name":"Department of Animal and Aquacultural Sciences Norwegian University of Life Sciences  \u00c5s Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3841-6207","authenticated-orcid":false,"given":"Marcus","family":"Clauss","sequence":"additional","affiliation":[{"name":"Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty University of Zurich  Zurich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2520-6251","authenticated-orcid":false,"given":"Sylvia","family":"Ortmann","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Zoo and Wildlife Research (IZW) Berlin  Berlin Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6108-0233","authenticated-orcid":false,"given":"Rasmus B.","family":"Jensen","sequence":"additional","affiliation":[{"name":"Department of Animal and Aquacultural Sciences Norwegian University of Life Sciences  \u00c5s Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,7,27]]},"reference":[{"key":"e_1_2_10_2_1","unstructured":"ANKOM. 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