{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T22:22:02Z","timestamp":1770416522637,"version":"3.49.0"},"reference-count":0,"publisher":"Walter de Gruyter GmbH","issue":"5","license":[{"start":{"date-parts":[[2018,2,14]],"date-time":"2018-02-14T00:00:00Z","timestamp":1518566400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2018,2,14]],"date-time":"2018-02-14T00:00:00Z","timestamp":1518566400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJFP"],"published-print":{"date-parts":[[2018,2,14]]},"abstract":"<jats:p>Reducing the size of food particles is crucial for herbivores. Seasonal dietary changes are known to influence animals\u2019 chewing efficiency. Proboscis monkeys (<jats:italic>Nasalis larvatus<\/jats:italic>) are foregut fermenters, with a high chewing efficiency allowing them to achieve very fine faecal particles. In this study, we investigated how proboscis monkeys\u2019 chewing efficiency varies between wet and dry seasons, hypothesising differences possibly related to diet change. Faecal particle size analysis is an established approach to estimate chewing efficiency in mammalian herbivores. We analysed 113 proboscis monkey faecal samples collected in the Lower Kinabatangan Wildlife Sanctuary, between 2015 and 2017. By following standard sieve analysis protocols, we measured a mean particle size MPS<jats:sub>0.025\u20138<\/jats:sub> of 0.45 \u00b1 0.14 mm, and confirmed a previous result that proboscis monkeys have a very low faecal MPS. This study highlights a seasonal influence on proboscis monkeys\u2019 chewing efficiency, with smaller MPS (better chewing efficiency) during the wet season. During that time of the year, individuals may potentially change their diet, as all faecal samples contained intact seeds. Whether the seasonal MPS difference in proboscis monkeys is smaller than in other colobines due to their \u201crumination\u201d strategy remains to be investigated.<\/jats:p>","DOI":"10.1159\/000490794","type":"journal-article","created":{"date-parts":[[2018,8,16]],"date-time":"2018-08-16T21:01:31Z","timestamp":1534453291000},"page":"327-334","source":"Crossref","is-referenced-by-count":6,"title":["Faecal Particle Size in Free-Ranging Proboscis Monkeys, Nasalis larvatus: Variation between Seasons"],"prefix":"10.1163","volume":"89","author":[{"given":"Valentine","family":"Thiry","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcus","family":"Clauss","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Danica J.","family":"Stark","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roseline C.","family":"Beudels-Jamar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R\u00e9gine Vercauteren","family":"Drubbel","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Senthilvel K.S.S.","family":"Nathan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Beno\u00eet","family":"Goossens","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martine","family":"Vercauteren","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","container-title":["Folia Primatologica"],"original-title":[],"link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/490794","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/brill.com\/view\/journals\/ijfp\/89\/5\/article-p327_5.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/brill.com\/downloadpdf\/journals\/ijfp\/89\/5\/article-p327_5.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,3,4]],"date-time":"2022-03-04T13:47:41Z","timestamp":1646401661000},"score":1,"resource":{"primary":{"URL":"https:\/\/brill.com\/view\/journals\/ijfp\/89\/5\/article-p327_5.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,2,14]]},"references-count":0,"journal-issue":{"issue":"5"},"URL":"https:\/\/doi.org\/10.1159\/000490794","relation":{},"ISSN":["0015-5713","1421-9980"],"issn-type":[{"value":"0015-5713","type":"print"},{"value":"1421-9980","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,2,14]]}}}