2014
DOI: 10.1016/j.jaridenv.2014.04.005
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Characterising an artiodactyl family inhabiting arid habitats by its metabolism: Low metabolism and maintenance requirements in camelids

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Cited by 28 publications
(24 citation statements)
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“…Although merycism (i.e., regurgitation and re-mastication) and the presence of comparatively fine digesta particles have been reported in non-ruminant foregut fermenters such as kangaroos Vendl et al, 2017) and proboscic monkeys (Nasalis larvatus) (Matsuda et al, 2011;Matsuda et al, 2014), true rumination linked to a sorting mechanism and with a physiologically fixed motor sequence (Gordon, 1968) only evolved twice, in the camelids and the taxonomic ruminants. While there appears to be no functional difference in the forestomach particle sorting mechanism between these two functional ruminant groups (Dittmann et al, 2015b), a major difference between them is the generally lower metabolism and lower feed intake in camelids (Dittmann et al, 2014). This may be linked to a less efficient morphophysiological design of their sorting mechanism (Dittmann et al, 2014;Dittmann et al, 2015b;Pérez et al, 2016); however, conclusive physiological studies are lacking.…”
Section: Basic Ruminant Digestive Physiologymentioning
confidence: 99%
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“…Although merycism (i.e., regurgitation and re-mastication) and the presence of comparatively fine digesta particles have been reported in non-ruminant foregut fermenters such as kangaroos Vendl et al, 2017) and proboscic monkeys (Nasalis larvatus) (Matsuda et al, 2011;Matsuda et al, 2014), true rumination linked to a sorting mechanism and with a physiologically fixed motor sequence (Gordon, 1968) only evolved twice, in the camelids and the taxonomic ruminants. While there appears to be no functional difference in the forestomach particle sorting mechanism between these two functional ruminant groups (Dittmann et al, 2015b), a major difference between them is the generally lower metabolism and lower feed intake in camelids (Dittmann et al, 2014). This may be linked to a less efficient morphophysiological design of their sorting mechanism (Dittmann et al, 2014;Dittmann et al, 2015b;Pérez et al, 2016); however, conclusive physiological studies are lacking.…”
Section: Basic Ruminant Digestive Physiologymentioning
confidence: 99%
“…While there appears to be no functional difference in the forestomach particle sorting mechanism between these two functional ruminant groups (Dittmann et al, 2015b), a major difference between them is the generally lower metabolism and lower feed intake in camelids (Dittmann et al, 2014). This may be linked to a less efficient morphophysiological design of their sorting mechanism (Dittmann et al, 2014;Dittmann et al, 2015b;Pérez et al, 2016); however, conclusive physiological studies are lacking.…”
Section: Basic Ruminant Digestive Physiologymentioning
confidence: 99%
“…In relation to body mass, the ostium between C1 and C2 is smaller than the Ostium rumino‐reticulare, and in contrast to the Ostium rumino‐reticulare , the ostium between C1 and C2 is not located along the longitudinal axis of C1 (Pérez et al, ). The size and location of this ostium have been hypothesized to be one cause for the lower food processing capacity in camelids as compared to ruminants (Dittmann et al, ). The C3 is a tubular structure, which is functionally divided as based on its mucosal lining: it has a mucigenous glandular mucosa in its proximal part that represents about three quarters of its length, and gastric and pyloric glandular glands in its distal part, which therefore corresponds functionally to the abomasum (Luciano, Voss‐Wermbter, Behnke, Engelhardt, & Reale, ; Vallenas et al, ; von Engelhardt, Ali, & Wipper, ).…”
Section: Introductionmentioning
confidence: 99%
“…This average MR of adult animals was somewhat lower than that measured with a mask in adults, or with chamber respirometry in juveniles, in other studies (Table 3). It appears possible that even when trained, animals wearing respiration masks feel a higher degree of distress than animals in respiration chambers; higher oxygen consumption in animals investigated by mask respirometry is, for example, also found in data for camelids (Dittmann et al, 2014). It was remarkable that the RMR measured in the present study was identical to the reported average mammal's mammalian basal metabolic rate (Kleiber, 1961); yet, although our animals were also observed to rest at night with closed eyes, their RMR was higher than that reported by Withers (1983).…”
Section: Resultsmentioning
confidence: 90%