Digesta retention time in roe deer Capreolus capreolus, as measured with cerium-, lanthanum- and chromium-mordanted fibre

Schwarm, Angela; Albrecht, Sylvia; Ortmann, Sylvia; Wolf, Christian; Clauss, Marcus

doi:10.1007/s10344-010-0450-5

Cited by 3 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results must be considered with caution because of the unexpectedly low CP content of the hay provided. Although differences between the four MRT markers were as expected, with increasing MRT from solute to small, intermediate and large particles (49,50) , the absolute difference between the small particle marker (mordanted with Cr) and the two larger particle markers (marked with La and Ce) was possibly underestimated, because for a given particle size Cr mordants are typically retained longer than lanthanide markers (51) .…”

Section: Discussionsupporting

confidence: 49%

Influence of ruminal methane on digesta retention and digestive physiology in non-lactating dairy cattle

et al. 2016

Self Cite

View full text Add to dashboard Cite

Enteric methane (CH 4 ) production is a side-effect of herbivore digestion, but it is unknown whether CH 4 itself influences digestive physiology. We investigated the effect of adding CH 4 to, or reducing it in, the reticulorumen (RR) in a 4 × 4 Latin square experiment with rumen-fistulated, non-lactating cows, with four treatments: (i) control, (ii) insufflation of CH 4 (iCH 4 ), (iii) N via rumen fistula, (iv) reduction of CH 4 via administration of bromochloromethane (BCM). DM intake (DMI), apparent total tract digestibility, digesta mean retention times (MRT), rumen motility and chewing activity, spot breath CH 4 emission (CH 4 exhal, litre/kg DMI) as well as CH 4 dissolved in rumen fluid (CH 4 RRf, µg/ml) were measured. Data were analysed using mixed models, including treatment (or, alternatively, CH 4 exhal or CH 4 RRf) and DMI relative to body mass 0·85 (rDMI) as covariates. rDMI was the lowest on the BCM treatment. CH 4 exhal was highest for iCH 4 and lowest for BCM treatments, whereas only BCM affected (reduced) CH 4 RRf. After adjusting for rDMI, CH 4 RRf had a negative association with MRT in the gastrointestinal tract but not in the RR, and negative associations with fibre digestibility and measures of rumination activity. Adjusting for rDMI, CH 4 exhal had additionally a negative association with particle MRT in the RR and a positive association with rumen motility. Thus, higher rumen levels of CH 4 (CH 4 exhal or CH 4 RRf) were associated with shorter MRT and increased motility. These findings are tentatively interpreted as a feedback mechanism in the ruminant digestive tract that aims at mitigating CH 4 losses by shortening MRT at higher CH 4 .

show abstract

Section: Discussionsupporting

confidence: 49%

Influence of ruminal methane on digesta retention and digestive physiology in non-lactating dairy cattle

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…T A B L E 3 p-values for the potential explanatory animal variables for retention times in regression models and the corresponding model R 2 It should be noted that mordants based on Cr and rare earths differ to some extent in their behaviour in the digestive tract, with Cr mordants typically being retained longer than rare earth mordants of the same particle size (Schwarm, Albrecht, Ortmann, Wolf, & Clauss, 2011;Udén et al, 1980). Therefore, it is likely that the differences between MRTs of smaller (here: Cr-mordanted) and the larger particles (here: La-and Ce-mordanted) are, in reality, even greater than those measured in our study.…”

Section: Discussionmentioning

confidence: 99%

Kinetics of solutes and particles of different size in the digestive tract of cattle of 0.5–10 years of age, and relationships with methane production

Grandl

Schwarm

Ortmann

et al. 2017

Animal Physiology Nutrition

View full text Add to dashboard Cite

The digestive physiology of cattle is characterised by comparatively long digesta mean retention times (MRTs), a particle sorting mechanism (difference in MRTs of large vs. small particles) and a distinct digesta washing (difference in MRTs between particles and fluids) in the reticulorumen (RR). How these processes mature during ontogeny, and how they link to other digestion characteristics and methane production, is largely unknown. We used a set of passage markers (Co-EDTA for fluids and hay particles of 2, 5 and 8 mm length mordanted with Cr, La and Ce, respectively) to measure MRTs in 12 heifers (0.5-2.1 years; hay only) and two groups of 15 lactating cows (2.4-10.0 years; forage-only vs. forage-concentrate diet). The MRTs differed between markers (Co < Cr < La < Ce) and were longer in heifers than cows, consistent with the lower feed intake in heifers. MRTs were mostly similar between cow groups and increased with age. Digesta washing was not affected by group, age, feed intake and number of chews per unit of feed. The degree of digesta washing was not related to CH measures. Particle sorting was more prominent in cows than heifers but did not differ between cow groups or change with age in cows. This could be the consequence of the abrupt increase in intake from heifers to cows at a time when gut capacity is not yet fully developed; particle sorting might then clear smaller particles from the RR sooner allowing a higher intake. Surprisingly, CH yield per ingested feed did not correlate with MRTs, and CH yield per unit of digested fibre decreased with increasing MRTs and with increasing fibre digestibility. As this pattern occurred in heifers and both cow groups, it appeared independent of age, indicating a mechanism that has not been described in the literature so far and requires further investigation.

show abstract

“…There was a systematic difference between the small, Cr‐mordanted fiber marker, which was excreted sooner, and the two larger, Ce‐ and La‐mordanted fiber markers. One possible explanation could be a difference in density of these marker systems: In ruminants Cr‐mordanted fiber is often excreted later than similar‐sized Ce‐ or La‐mordanted fiber (reviewed in Schwarm, Albrecht, Ortmann, Wolf, & Clauss, ), which could be a consequence of a higher density of Cr‐mordants. Because the colonic furrow of hystricomorph rodents is on the colon's mesenteric (i.e., dorsal) side (Gorgas, ; Snipes, Hornicke, Bjornhag, & Stahl, ), particles of higher density might be less likely trapped in there than lighter Ce‐ or La‐mordants, and hence be excreted faster.…”

Section: Discussionmentioning

confidence: 99%

Digestive physiology of captive capybara (Hydrochoerus hydrochaeris)

et al. 2019

Self Cite

View full text Add to dashboard Cite

The capybara (Hydrochoerus hydrochaeris), the largest living rodent, probably has a “mucus‐trap” colonic separation mechanism. To test this hypothesis, we measured the mean retention time of a solute marker (MRTSolute), 2 mm (MRT2 mm), 10 mm (MRT10 mm), and 20 mm (MRT20 mm) particle markers and nutrient digestibility in adult captive capybaras (27–52 kg body mass (BM), 2–11 yr). In addition, total gut fill and the selectivity factor (MRTSolute/MRT2 mm) were calculated, and mean faecal particle size and metabolic fecal nitrogen of captive capybaras were compared to those of free‐ranging specimens. Finally, we also measured methane production in one animal. The MRT2 mm (29.2 ± 8.2 hr) was different (p < 0.01) from MRTSolute (37.0 ± 13.1 hr), MRT10 mm (36.5 ± 8.2 hr), and MRT20 mm (35.1 ± 9.6 hr). The selectivity factor (1.26 ± 0.30) was in the range considered typical for a “mucus‐trap” colonic separation mechanism. The estimated total gut fill was 1.50 ± 0.37% and 1.73 ± 0.25% of BM calculated from the results of the 2‐mm and 10‐mm particle markers, respectively. The CH4 emission was 13.7 L/day. Captive capybaras had greater mean fecal particle size (0.44 ± 0.06 vs. 0.29 ± 0.05 mm, p < 0.001) and metabolic fecal nitrogen (65.5 ± 3.91 vs. 46.8 ± 10.5% of fecal nitrogen, p < 0.001) than free‐ranging capybaras. Organic matter digestibility decreased less steeply with increasing dietary crude fiber content in capybaras as compared to published data from rabbits or guinea pigs. Accordingly, the digestive physiology of the capybara is characterized by a comparatively high fiber digestibility, with a “mucus‐trap” colonic separation mechanism, allowing capybaras to thrive on forage‐only diets.

show abstract

Digesta retention time in roe deer Capreolus capreolus, as measured with cerium-, lanthanum- and chromium-mordanted fibre

Cited by 3 publications

References 18 publications

Influence of ruminal methane on digesta retention and digestive physiology in non-lactating dairy cattle

Influence of ruminal methane on digesta retention and digestive physiology in non-lactating dairy cattle

Kinetics of solutes and particles of different size in the digestive tract of cattle of 0.5–10 years of age, and relationships with methane production

Digestive physiology of captive capybara (Hydrochoerus hydrochaeris)

Contact Info

Product

Resources

About