Red seaweed (<i>Asparagopsis taxiformis)</i>supplementation reduces enteric methane by over 80 percent in beef steers

Roque, Breanna M.; Venegas, Marielena E.; Kinley, Robert D.; Denys, R; Neoh, Tze Loon; Duarte, T. L.; Yang, Xiang; Salwen, Joan King; Kebreab, E.

doi:10.1101/2020.07.15.204958

Cited by 10 publications

(15 citation statements)

References 40 publications

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“…The anti-methanogenic capacity of A. taxiformis leads to hydrogen accumulation (Kinley et al ., 2020; Roque et al ., 2020) as predicted by our model in Fig. 6.…”

Section: Discussionmentioning

confidence: 99%

“…Studies showing the effect of A. taxiformis supplementation on live weight (Li et al ., 2016), average daily weight gain and feed conversion efficiency (Kinley et al ., 2020; Roque et al ., 2020) are still few to provide a large data base for concluding on the impact of A. taxiformis on animal productivity and feed efficiency. However, the studies of (Kinley et al ., 2020; Roque et al ., 2020) suggest that feed conversion efficiency tend to increase concomitant with the reduction of methane production induced by an adequate supplementation of A. taxiformis , supporting the theory of redirection of energy otherwise lost as methane (Kinley et al ., 2020). An opportunity to enhance the action of A. taxiformis might be the implementation of a feeding strategy integrating macroalgae supplementation with an adequate additive allowing to redirect metabolic hydrogen towards nutritional fermentation products beneficial to the animal.…”

Section: Discussionmentioning

confidence: 99%

“…The species of the red macroalgae Asparagopsis have proven a strong anti-methanogenic effect both in vitro (Machado et al ., 2014) and in vivo (Roque et al ., 2019). In particular, Asparagopsis taxiformis appears as the most potent species for methane mitigation with studies reporting a reduction in enteric methane up to 80% in sheep (Li et al ., 2016) and up to 80% and 98% in beef cattle (Kinley et al ., 2020; Roque et al ., 2020). The anti-methanogenic power of A. taxiformis results from the action of its multiple secondary metabolites with antimicrobial activities, being bromoform the most abundant anti-methanogenic compound (Machado et al ., 2016b).…”

Section: Introductionmentioning

confidence: 99%

“…Detrimental effects might include deterioration of the ruminal mucosa and the transfer of bromoform to tissues, blood and milk. Previous studies have not detected bromoform in animal tissues (Li et al ., 2016; Kinley et al ., 2020; Roque et al ., 2020). The positive and adverse effects of A. taxiformis on the rumen microbiota are dose-dependent (Machado et al ., 2016a) and operate in a dynamic fashion.…”

Section: Introductionmentioning

confidence: 99%

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Modelling the impact of the macroalgaeAsparagopsis taxiformison rumen microbial fermentation and methane production

Muñoz-Tamayo

Chagas

Ramin

et al. 2020

Preprint

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BackgroundThe red macroalgae Asparagopsis taxiformis is a potent natural supplement for reducing methane production from cattle. A. taxiformis contains several anti-methanogenic compounds including bromoform that inhibits directly methanogenesis. The positive and adverse effects of A. taxiformis on the rumen microbiota are dose-dependent and operate in a dynamic fashion. It is therefore key to characterize the dynamic response of the rumen microbial fermentation for identifying optimal conditions on the use of A. taxiformis as a dietary supplement for methane mitigation. Accordingly, the objective of this work was to model the effect of A. taxiformis supplementation on the rumen microbial fermentation under in vitro conditions. We adapted a published mathematical model of rumen microbial fermentation to account for A. taxiformis supplementation. We modelled the impact of A. taxiformis on the fermentation and methane production by two mechanisms, namely (i) direct inhibition of the growth rate of methanogenesis by bromoform and (ii) hydrogen control on sugars utilization and on the flux distribution towards volatile fatty acids production. We calibrated our model using a multi-experiment estimation approach that integrated experimental data with six macroalgae supplementation levels from a published in vitro study assessing the dose-response impact of A. taxiformis on rumen fermentation.Resultsour model captured satisfactorily the effect of A. taxiformis on the dynamic profile of rumen microbial fermentation for the six supplementation levels of A. taxiformis with an average determination coefficient of 0.88 and an average coefficient of variation of the root mean squared error of 15.2% for acetate, butyrate, propionate, ammonia and methane.Conclusionsour results indicated the potential of our model as prediction tool for assessing the impact of additives such as seaweeds on the rumen microbial fermentation and methane production in vitro. Additional dynamic data on hydrogen and bromoform are required to validate our model structure and look for model structure improvements. We are working on model extensions to account for in vivo conditions. We expect this model development can be useful to help the design of sustainable nutritional strategies promoting healthy rumen function and low environmental footprint.

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“…The anti-methanogenic capacity of A. taxiformis leads to hydrogen accumulation (Kinley et al ., 2020; Roque et al ., 2020) as predicted by our model in Fig. 6.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling the impact of the macroalgaeAsparagopsis taxiformison rumen microbial fermentation and methane production

Muñoz-Tamayo

Chagas

Ramin

et al. 2020

Preprint

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“…There has been considerable interest in the use of red seaweed, and in particular Asparagopsis taxiformis to increase production of cattle and to reduce greenhouse gas emissions [1, 2]. However, several different seaweeds have been fed to cattle and include brown seaweed ( Ascophyllum nodosum ), and Saragssum wightii .…”

Section: Introductionmentioning

confidence: 99%

A meta-analysis of effects of feeding seaweed on beef and dairy cattle performance and methane yield

Golder

Lean

Grant

et al. 2021

Preprint

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There has been considerable interest in the use of red seaweed, and in particular Asparagopsis taxiformis, to increase production of cattle and to reduce greenhouse gas emissions. We hypothesized that feeding seaweed or seaweed derived products would increase beef or dairy cattle performance as indicated by average daily gain (ADG), feed efficiency measures, milk production, and milk constituents, and reduce methane emissions. We used meta-analytical methods to evaluate these hypotheses. A comprehensive search of Google Scholar, Pubmed and ISI Web of Science produced 14 experiments from which 23 comparisons of treatment effects could be evaluated. Red seaweed ( A. taxiformis ) and brown seaweed ( Ascophyllum nodosum) were the dominant seaweeds used. There were no effects of treatment on ADG or dry matter intake (DMI). There was an increase in efficiency for feed to gain by 0.41 ± 0.22 kg per kg [standardized mean difference (SMD) = 0.70 ± 0.35; P = 0.001], but not for gain to feed (P = 0.215), although the direction of the change was for improved efficiency. The type of seaweed used was not a significant covariable for ADG and DMI. Milk production was increased with treatment on weighted mean difference (WMD; 1.35 ± 0.44 kg/d; P <0.001); however, the SMD of 0.45 was not significant (P = 0.111). Extremely limited data suggest the possibility of increased percentages of milk fat (P = 0.040) and milk protein (P = 0.001) on DerSimonian and Laird (D&L) WMD evaluation. The limited data available indicate dietary supplementation with seaweed produced a significant and substantial reduction in methane yield by 5.28 ± 3.5 g/kg DMI (P = 0.003) on D&L WMD evaluation and a D&L SMD of ?1.70 (P = 0.001); however, there was marked heterogeneity in the results ( I 2 > 80%). In one comparison, methane yield was reduced by 97%. We conclude that while there was evidence of potential for benefit from seaweed use to improve production and reduce methane yield more in vivo experiments are required to strengthen the evidence of effect and identify sources of heterogeneity in methane response, while practical applications and potential risks are evaluated for seaweed use.

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Sustainable Use of Seaweeds from S. Martinho do Porto, Portugal – Past, Present, and Future Perspective

Cavaco

Duarte

Bernardino

et al. 2021

Proceedings of the 1st International Conference on Water Energy Food and Sustainability (ICoWEFS 2021)

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Red seaweed (Asparagopsis taxiformis)supplementation reduces enteric methane by over 80 percent in beef steers

Cited by 10 publications

References 40 publications

Modelling the impact of the macroalgaeAsparagopsis taxiformison rumen microbial fermentation and methane production

Modelling the impact of the macroalgaeAsparagopsis taxiformison rumen microbial fermentation and methane production

A meta-analysis of effects of feeding seaweed on beef and dairy cattle performance and methane yield

Sustainable Use of Seaweeds from S. Martinho do Porto, Portugal – Past, Present, and Future Perspective

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