David R Yáñez-Ruiz

David R Yáñez-Ruiz
Spanish National Research Council | CSIC · Experimental Station of Zaidín

PhD

About

180
Publications
61,113
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Publications

Publications (180)
Article
Full-text available
Significance Agricultural methane emissions must be decreased by 11 to 30% of the 2010 level by 2030 and by 24 to 47% by 2050 to meet the 1.5 °C target. We identified three strategies to decrease product-based methane emissions while increasing animal productivity and five strategies to decrease absolute methane emissions without reducing animal pr...
Article
The implementation of Precision Livestock Farming (PLF) concepts has been pointed out as an indirect strategy that could potentially help mitigating the environmental impacts of livestock production systems. To date, few studies have focused on analyzing specifically the relationship among PLF adoption and environmental performance, so sustainabili...
Preprint
Full-text available
Ruminants are able to produce large quantities of saliva which enter into the rumen. Although previous research has indicated that salivary immunoglobulins can partially modulate the rumen microbial activity, the role of the salivary components other than ions on the rumen microbial ecosystem has not been thoroughly investigated in ruminants. A tot...
Article
Full-text available
Newborn dairy ruminants are usually separated from their dams after birth and fed on milk replacer. This lack of contact with adult animals may hinder the rumen microbiological and physiological development. This study evaluates the effects of rearing newborn goat kids in contact with adult companions on the rumen development. Thirty-two newborn go...
Article
Full-text available
3-Nitrooxypropanol (3-NOP) supplementation to cattle diets mitigates enteric CH4 emissions and may also be economically beneficial at farm level. However, the wider rumen metabolic response to methanogenic inhibition by 3-NOP and the NO2- intermediary metabolite requires further exploration. Furthermore, NO3- supplementation potently decreases CH4...
Article
Full-text available
Background The knowledge about blood circulating microbiome and its functional relevance in healthy individuals remains limited. An assessment of changes in the circulating microbiome was performed by sequencing peripheral blood mononuclear cells (PBMC) bacterial DNA from goats supplemented or not in early life with rumen liquid transplantation. R...
Article
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BACKGROUND Meeting the energy and nitrogen requirements of high‐performing ruminants while avoiding digestive disturbances (i.e. rumen acidosis) is a key priority in ruminant nutrition. This study evaluated the effect of a cereal ammoniation treatment, in which barley grains are combined with urea and enzymes that catalyze the conversion of urea to...
Article
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Editorial on the Research Topic Gut Microbiome Modulation in Ruminants: Enhancing Advantages and Minimizing Drawbacks Historically, the gastrointestinal tract (GIT) was considered an organ solely equipped for the digestion and absorption of nutrients. However, the GIT harbors the largest population of immune cells and microbes that outnumber the en...
Preprint
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Ruminant livestock enteric fermentation contributes approximately one-third of the global anthropogenic methane (CH 4 ) emissions and is projected to increase significantly to meet the increasing demand for animal-sourced protein. Methane, a short-lived greenhouse gas, needs to be reduced -24 to -47% by 2050 relative to 2010 to meet the 2.0°C targe...
Article
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The monthly variations in metal concentration of Cadmium (Cd), Zinc (Zn) and Chromium (Cr) were determined in tissues of Mytilus galloprovincialis and seawater obtained from the mussel farm installed along the Al Hoceima coasts, during the sampling period of 2018. The heavy metals encountered in the bivalves were higher than those observed in their...
Article
Full-text available
The European small ruminants (i.e. sheep and goats) farming sector (ESRS) provides economic, social and environmental benefits to society, but is also one of the most vulnerable livestock sectors in Europe. This sector has diverse livestock species, breeds, production systems and products, which makes difficult to have a clear vision of its challen...
Preprint
Full-text available
Background: Newborn ruminants possess an underdeveloped rumen which is colonized by microorganisms acquired from adult animals and the surrounding environment. This microbial transfer can be limited in dairy systems in which newborns are separated from their dams at birth. This study explores whether the direct inoculation of fresh or autoclaved ru...
Chapter
Full-text available
Desde los tiempos de Pasteur, la veterinaria llevó la voz cantante en el estudio de las enfermedades infecciosas (incluyendo las zoonosis y las enfermedades de transmisión alimentaria) y de la modulación empírica de la microbiota animal a través de la dieta y de la transferencia de microorganismos. Sin embargo, no es menos cierto que el reciente es...
Book
Major advances in analytical techniques and genomics have transformed our understanding of rumen microbiology. This understanding is of critical importance to livestock production since rumen function affects nutritional efficiency, emissions from ruminants (such as methane and nitrous oxide) as well as animal health. This collection reviews what w...
Article
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There is an increasing pressure to identify feed additives which increase productivity or decrease methane emissions. This paper aims to elucidate the effects of supplementing a specific essential oils blend Agolin® Ruminant on the productivity of dairy cows in comparison to non-treated animals. A total of 23 in vivo studies were identified in whic...
Article
Full-text available
Ruminants are born with an undeveloped physical, metabolic, and microbial rumen. Rumen development is limited under artificial rearing systems when newborn animals are separated from the dam, fed on milk replacer, and weaned at an early age. This study aims to evaluate the effects of early-life inoculation of young ruminants with rumen fluid from a...
Article
Full-text available
Ruminants contribute to the emissions of greenhouse gases, in particular methane, due to the microbial anaerobic fermentation of feed in the rumen. The rumen simulation technique was used to investigate the effects of the addition of different supplemental plant oils to a high concentrate diet on ruminal fermentation and microbial community composi...
Article
Full-text available
Increasing productivity is a key target in ruminant science which requires better understanding of the rumen microbiota. This study investigated how maternal vs artificial rearing shapes the rumen microbiota using 24 sets of triplet lambs. Lambs within each sibling set were randomly assigned to: natural rearing on the ewe (NN); ewe colostrum for 24...
Article
Full-text available
The role of marine lipids as modulators of ruminal biohydrogenation of dietary unsaturated fatty acids may be explained by the effects of their n-3 polyunsaturated fatty acids (PUFA) on the bacterial community. However, the impact of individual PUFA has barely been examined, and it is uncertain which bacteria are truly involved in biohydrogenation....
Article
Nitrogen is a component of essential nutrients critical for the productivity of ruminants. If excreted in excess, N is also an important environmental pollutant contributing to acid deposition, eutrophication, human respiratory problems, and climate change. The complex microbial metabolic activity in the rumen and the effect on subsequent processes...
Article
Enteric methane (CH4) production attributable to beef cattle contributes to global greenhouse gas emissions. Reliably estimating this contribution requires extensive CH4 emission data from beef cattle under different management conditions worldwide. The objectives were to: 1) predict CH4 production (g d−1 animal−1), yield [g (kg dry matter intake;...
Article
The objective of this study was to evaluate the performance of existing models predicting enteric methane (CH⁠4) emissions, using a large database (3183 individual data from 103 in vivo studies on dairy and beef cattle, sheep and goats fed diets from different countries). The impacts of dietary strategies to reduce CH⁠4 emissions, and of diet quali...
Conference Paper
Full-text available
Efecto de los taninos condensados purificados de Acacia horrida (L.) sobre la metanogénesis en ganado caprino Los taninos son metabolitos secundarios de alto peso molecular que se pueden encontrar en diferentes partes de determinadas plantas cuya función principal es la protección biológica frente a la predación de los animales herbívoros. La activ...
Article
Dairy goat production systems in developed countries are experiencing an intensification process in terms of higher farm size, electronic identification, reproductive intensification, genetic selection and milking automation. This new situation generates "big data" susceptible to be used to aid farmers during the decision making process. This case...
Chapter
The decline in European sheep and goat farmers is a complicated agricultural challenge that requires solutions and innovation to reverse. The complexity of this challenge means that a multi-stakeholder approach is required to understand how to prioritise each component of the challenge and find appropriate solutions. The multi-stakeholder approach...
Article
Full-text available
Methane is the main greenhouse-gas contributor to global warming in the livestock sector; it is generated by anaerobic fermentation in the different sections of the gut, and the methane concentration differs significantly among species. Methane is produced only by certain types of microorganisms called methanogens. The species composition of methan...
Article
Full-text available
Heavy metal concentrations of Cd, Cr, Cu, Fe, Ni, Zn, Co, and Pb were investigated in soft tissues of Mytilus galloprovincialis coming from an aquaculture farm in Cala Iris sea of AlHoceima. Mytilus galloprovincialis were collected monthly during the period January to December 2016. The seasonal variations were affected significantly the concentrat...
Data
Relative abundance of some Genera in the different experimental groups at Weaning (W), Weaning + 1 month (W + 1), and Weaning + 4 months (W + 4) time points. Treatment groups: D−k− = NegNeg, D−k+ = NegPos, D+k− = PosNeg, D+k+ = PosPos.
Data
Relative abundance of some Families in the different experimental groups at Weaning (W), Weaning + 1 month (W + 1), and Weaning + 4 months (W + 4) time points. Treatment groups: D−k− = NegNeg, D−k+ = NegPos, D+k− Q14 = PosNeg, D+k+ = PosPos.
Data
Heatmap for the major metabolic pathways constructed including metabolites that were significantly changed in kids by BCM treatment at W, W + 1, and W + 4.
Article
Full-text available
This work aimed to gain insight into the transition from milk to solid feeding at weaning combining genomics and metabolomics on rumen contents from goat kids treated with a methanogenic inhibitor (bromochloromethane, BCM). Sixteen goats giving birth to two kids were used. Eight does were treated (D+) with BCM after giving birth and over 2 months....
Article
Full-text available
The rumen is a complex ecosystem composed of anaerobic bacteria, protozoa, fungi, methanogenic archaea and phages. These microbes interact closely to breakdown plant material that cannot be digested by humans, whilst providing metabolic energy to the host and, in the case of archaea, producing methane. Consequently, ruminants produce meat and milk,...
Conference Paper
Full-text available
Climate projections for Europe indicate a general warming trend and more variable patterns of precipitation in the future, with an increase in frequency and length of dry spells periods and droughts. Expected changes in climate will impact on livestock systems, both on the animals directly and the production system more widely, unless adaptation st...
Article
Full-text available
Enteric methane (CH4) production from cattle contributes to global greenhouse gas emissions. Measurement of enteric CH4 is complex, expensive and impractical at large scales; therefore, models are commonly used to predict CH4 production. However, building robust prediction models requires extensive data from animals under different management syste...
Conference Paper
Full-text available
Assessing the sustainability of small ruminant systems is crucial to ensure their long-term viability, to identify potential areas of improvement, to uncover trade-offs between different aspects of performance and to, potentially, demonstrate benefits of particular management strategies. However, there is scarce literature and guidance regarding op...
Article
Full-text available
Ruminant production systems are important contributors to anthropogenic methane (CH4) emissions, but there are large uncertainties in national and global livestock CH4 inventories. Sources of uncertainty in enteric CH4 emissions include animal inventories, feed dry matter intake (DMI), ingredient and chemical composition of the diets, and CH4 emiss...
Article
Full-text available
Early postnatal nutrition may have a significant subsequent impact on metabolic disorders during the entire lifespan of lambs. The aim of the present study was to describe the changes in biochemical, immunological, hepatic, and ruminal parameters of fattening lambs derived from early feed restriction during the suckling phase. Twenty-four merino la...
Article
Full-text available
BACKGROUND Rumen microbiota has been used as inoculum for in vitro studies and as probiotics to improve productivity in young animals. However great variability across studies has been noted depending on the inoculum considered. This paper aims to assess the relevance of different factors (microbial fraction, collection time, donor animal diet, fer...
Article
Full-text available
Bacteria firmly attached to the gastrointestinal epithelium during the pre-weaning phase may show a significant impact on nutrient processing, immunity parameters, health and feed efficiency of lambs during post-weaning phases. Thus, the aim of this study was to describe the differences in the ileal epimural microbiota (e.g. total bacteria, Prevote...
Poster
Full-text available
Implicaciones del cambio climático en los sistemas de pequeños rumiantes G. Pardo1, S. Mullender2, K. Zaralis2, M. Dellar3, D. Yañez-Ruiz4, M.J. Carabaño5, A. Del Prado1 1Basque Centre for Climate Change (BC3), Edificio Sede, Campus EHU, Leioa, Vizcaya 2The Organic Research Centre (ORC), Hamstead Marshall, Newbury RG20 0HR, UK 3Scotland’s Rural C...
Conference Paper
Full-text available
Young ruminants present at birth an undeveloped rumen which requires an anatomical, physiological and microbial development to fully stablish its function as a fermentation chamber. This process can be jeopardized in animals with artificial milk feeding due to the absence of a direct contact with adult animals which represent the main source of rum...
Conference Paper
As part of the Global Network project, led by Alex Hristov (Penn State, USA), a dataset containing more than 6,000 individual animal data on methane (CH4) and ammonia emissions, and other metadata (intake, diet composition, animal parameters) from ruminants was built. A sub-dataset (from 11 partners) was used to compare the performances of extant p...
Article
Full-text available
The aim of this work was to evaluate the effect of feeding management during the first month of life (natural with the mother, NAT, or artificial with milk replacer, ART) on the rumen microbial colonization and the host innate immune response. Thirty pregnant goats carrying two fetuses were used. At birth one kid was taken immediately away from the...
Data
Primer sequences for toll-like receptors (TLR), β-defensin, peptidoglycan recognition protein 1 (PGLYRP1) and β-actin for real-time PCR. (PDF)
Data
Genus-level taxonomic composition of the ruminal bacterial community at different ages and feeding systems in kids (% of sequences). (TIF)
Article
Full-text available
There are worldwide a number of by-products with a strong potential for use in animal feeding to cover purposes as farm economic profitability enhancement or searching of functional food ingredients. Probably fruit and vegetable industry (i.e. olive milling wastes) are amongst the most representative sectors. Two experiments were performed with lac...
Article
Full-text available
This study using the rumen simulation technique (RUSITEC) investigated the changes in the ruminal microbiota and anaerobic fermentation in response to the addition of different lipid supplements to a ruminant diet. A basal diet with no oil added was the control, and the treatment diets were supplemented with sunflower oil (2%) only, or sunflower oi...
Article
Full-text available
La creciente intensificación del sector caprino lechero ha derivado en una mayor dependencia del aporte externo de alimentos concentrados y forrajes con-servados, generalmente de coste elevado (Castel Genis et al., 2007) que, junto con la volatilidad del precio de la leche, supone la amenaza más importante para la viabilidad del sector. Por tanto s...
Chapter
Full-text available
The increase in non-cow milk and milk products demand has to be addressed against a background of greater competition for water, land, energy, and feed resources—a major challenge that is exacerbated by climate change. It is widely accepted that increases in the concentrations of greenhouse gases (GHG) in the atmosphere are directly linked to globa...
Article
Ruminant husbandry is a major source of anthropogenic greenhouse gases (GHG). Filling knowledge gaps and providing expert recommendation are important for defining future research priorities, improving methodologies and establishing science-based GHG mitigation solutions to government and non-governmental organisations, advisory/extension networks,...
Article
In vitro fermentation techniques (IVFT) have been widely used to evaluate the nutritive value of feeds for ruminants and in the last decade to assess the effect of different nutritional strategies on methane (CH4) production. However, many technical factors may influence the results obtained. The present review has been prepared by the ‘Global Netw...