Funcionalidade do sulco do retículo em bovinos adultos e avaliação de técnicas alternativas para preparação, infusão e coleta de marcadores da fase fluida ruminal

Daniel, João Luiz Pratti; Júnior, João Chrysostomo de Resende; Melo, Leandra Queiroz de; Souza, Rooveth Luis Melo de; Guerrero, Mario César

doi:10.1590/s1413-70542007000600037

Cited by 2 publications

(5 citation statements)

References 14 publications

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“…The fractional rates of absorption of VFA were similar between the two infusion methods, demonstrating again that it is secure estimating fractional rates of clearance using the technique of infusion of markers into intact digesta, as proposed by Daniel, de Resende Júnior (10).…”

Section: Discussionsupporting

confidence: 56%

“…Immediately before infusion, the solution was heated to 37 °C and the total volume was divided into four equal parts. One liter was infused into the cranial sac and other three liters were infused in different places of the rumen ventral sac (10).…”

Section: Measurements Of Vfa Absorptionmentioning

confidence: 99%

“…For the intact digesta, samples of rumen fluid were collected at 90, 105, 120, 150, 210, and 330 min after infusion. Sampling sequence started 90 minutes after infusion in order to wait the ruminal motility to perform the homogenization of the markers with the digesta, as proposed by Daniel, de Resende Júnior (10). For the evacuated digesta, the samples were collected at the following times: zero (immediately after the return of digesta to the rumen), 15, 30, 60, 120 and 240 min (8).…”

Section: Measurements Of Vfa Absorptionmentioning

confidence: 99%

“…MEDICINA VETERINARIA Y ZOOTECNIA Due to these concerns Daniel, de Resende Júnior (10) have proposed an alternative approach for infusion and collection of markers. The new technique is based on the natural mixing of markers with ruminal digesta because of rumen motility.…”

Section: Introductionmentioning

confidence: 99%

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Determination of volatile fatty acids clearance in intact ruminal digesta

Júnior

Daniel

Vianna

et al. 2019

Ces. Med. Vet. Zootec.

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Cannulated cows were allocated to a cross-over design to evaluate the technique for determination of volatile fatty acid (VFA) clearance by infusion of marker solution into intact ruminal digesta, and verify the technique sensibility to the variation in the diet. Animals received diet of forage or forage plus concentrate and infusion of valeric acid and Cr-EDTA solution into intact or evacuated ruminal digesta. The total fractional rate of VFA clearance (FRVFAC) was estimated by the exponential decay of valerate over time. The passage FRVFAC to the omasum was assumed as the decay in ruminal Cr concentration and the absorption FRVFAC was estimated by the difference. The total FRVFAC and absorption did not differ between techniques. The passage FRVFAC, however, was lower when the marker solution was added into the evacuated digesta, probably reflecting the destabilization of the rumen environment during the evacuation and the largest volume of fluid observed in animals with evacuated digesta. In conclusion, the infusion of marker solution into intact digesta with homogenization performed by ruminal motility could be usable for the VFA ruminal clearance determination since it seems to cause lesser disturbance in the ruminal environment.

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Section: Discussionsupporting

confidence: 56%

Section: Measurements Of Vfa Absorptionmentioning

confidence: 99%

Section: Measurements Of Vfa Absorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of volatile fatty acids clearance in intact ruminal digesta

Júnior

Daniel

Vianna

et al. 2019

Ces. Med. Vet. Zootec.

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“…In contrast, two liquid markers in fistulated individuals -one inserted into the rumen via the cannula, and one ingested by the animal itself (Daniel et al 2007) -can be used. If markers are subsequently measured in faeces to determine gastrointestinal and reticuloruminal retention times, no particular manipulation beyond the marker insertion is necessary.…”

Section: Introductionmentioning

confidence: 99%

No ‘bypass’ in adult ruminants: Passage of fluid ingested vs. fluid inserted into the rumen in fistulated muskoxen (Ovibos moschatus), reindeer (Rangifer tarandus) and moose (Alces alces)

Lechner¹,

Barboza²,

Collins³

et al. 2009

Comparative Biochemistry and Physiology Part A: Molecular &

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In young ruminants, the reticular groove ensures that ingested milk is channelled past the forestomach to avoid malfermentation. It has been speculated that some adult wild ruminants, in particular browsing species, maintain a functional oesophageal (reticular) groove, that soluble nutrients can thus bypass the rumen, and that thus the energetic gain from the diet can be increased. We inserted a fluid marker (Co-EDTA) via cannula into the rumen and simultaneously fed a diet that contained a second fluid marker (Sm-EDTA), and analysed the faecal marker excretion patterns, in muskoxen (Ovibos moschatus, n=4 in two experiments each), reindeer (Rangifer tarandus, n=4 in a total of six experiments) and moose (Alces alces, n=1 in one experiment). In no case was the orally fed marker excreted dinstinctively earlier than the marker inserted into the rumen, which indicates that substantial bypass did not occur in these animals. However, differences between the three species in the excretion of the two markers from the rumen are consistent with hypothetical differences in the stratification of rumen contents. We suggest that effects previously ascribed to a "rumen bypass" in wild ruminants most likely reflect differences in the passage from the rumen. No 'bypass' in adult ruminants AbstractIn young ruminants, the reticular groove ensures that ingested milk is channelled past the forestomach to avoid malfermentation. It has been speculated that some adult wild ruminants, in particular browsing species, maintain a functional oesophageal (reticular) groove, that soluble nutrients can thus bypass the rumen, and that thus the energetic gain from the diet can be increased. We inserted a fluid marker (Co-EDTA) via cannula into the rumen and simultaneously fed a diet that contained a second fluid marker (Sm-EDTA), and analysed the faecal marker excretion patterns, in muskoxen (Ovibos moschatus, n=4 in two experiments each), reindeer (Rangifer tarandus, n=4 in a total of six experiments) and moose (Alces alces, n=1 in one experiment). In no case was the orally fed marker excreted dinstinctively earlier than the marker inserted into the rumen, which indicates that substantial bypass did not occur in these animals. However, differences between the three species in the excretion of the two markers from the rumen are consistent with hypothetical differences in the stratification of rumen contents. We suggest that effects previously ascribed to a "rumen bypass" in wild ruminants most likely reflect differences in the passage from the rumen.

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Funcionalidade do sulco do retículo em bovinos adultos e avaliação de técnicas alternativas para preparação, infusão e coleta de marcadores da fase fluida ruminal

Cited by 2 publications

References 14 publications

Determination of volatile fatty acids clearance in intact ruminal digesta

Determination of volatile fatty acids clearance in intact ruminal digesta

No ‘bypass’ in adult ruminants: Passage of fluid ingested vs. fluid inserted into the rumen in fistulated muskoxen (Ovibos moschatus), reindeer (Rangifer tarandus) and moose (Alces alces)

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