Raúl David Guevara

ORCID: 0000-0002-6536-8864
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About
Contact & Profiles
Research Areas
  • Animal Behavior and Welfare Studies
  • Effects of Environmental Stressors on Livestock
  • Animal Nutrition and Physiology
  • Human-Animal Interaction Studies
  • Agriculture Sustainability and Environmental Impact
  • Agriculture and Farm Safety
  • Meat and Animal Product Quality
  • Ruminant Nutrition and Digestive Physiology
  • Folklore, Mythology, and Literature Studies
  • Rangeland Management and Livestock Ecology
  • Pasture and Agricultural Systems
  • Mycobacterium research and diagnosis
  • Animal Disease Management and Epidemiology
  • Soil Carbon and Nitrogen Dynamics

Universitat Autònoma de Barcelona
2022-2024

Centre for Research on Ecology and Forestry Applications
2023-2024

Grazing studies were carried out over a 5-year period using pregnant cows, yearling calves and 2-year-old heifers to investigate the influence of diet on intake, methane (CH4) emissions retention nitrogen (N). Monoculture legume (birdsfoot trefoil, BFT cicer milkvetch, CMV) or grass (meadow bromegrass, MBG) pastures rotationally stocked, during year 4 5, treatments contrasted with total mixed rations (TMR) fed in confinement. The sulfur hexafluoride (SF6) method was used continuously measure...

10.3390/agronomy12020304 article EN cc-by Agronomy 2022-01-25

The goal of the current study was to develop a pig model investigate oxidative stress with low negative impact on piglet welfare. Four independent trials (A, B, C, and D) were performed using single intraperitoneal shot lipopolysaccharide (LPS) as an immune challenge, aiming assess minimal LPS dose for piglets different age trigger measurable acute response in healthy animals. In trial A, received 25 µg/KgBW at 41 days post-weaning (p.w.). 28 p.w., C And D, injected 50 21 respectively....

10.1186/s12917-024-04320-4 article EN cc-by-nc-nd BMC Veterinary Research 2024-10-16

Regrouping practices are frequent in pig production, altering hierarchy and triggering aggressive behaviors. The present study aimed to investigate the physiological responses of piglets an experimental model designed induce stress through systematic social mixing two trials. In Trial A, a total 144 crossbred (25 days postweaning) housed one room within 36 pens (four piglets/pen) were used randomly assigned either control group (piglets maintained their pen, Ctrl-A) or challenge mixed,...

10.3389/fvets.2024.1433628 article EN cc-by Frontiers in Veterinary Science 2024-09-23

Considering the interconnections between human well-being, animal welfare, and environment, this study aimed to investigate impacts of drought COVID-19 pandemic on small-scale goat farmers’ well-being their perception goats’ welfare following One Welfare framework. Using a telephone survey, close-ended questions, Likert scales, we assessed in Coquimbo region Chile. The DASS-21 questionnaire was used evaluate mental health. Goat farmers perceived scarcity water food for animals as factors...

10.3390/ani13203297 article EN cc-by Animals 2023-10-23
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