A5024963012- Reproductive Physiology in Livestock
- Ruminant Nutrition and Digestive Physiology
- Effects of Environmental Stressors on Livestock
- Animal Behavior and Welfare Studies
- Genetic and phenotypic traits in livestock
- Nitrogen and Sulfur Effects on Brassica
- Animal health and immunology
- Livestock Management and Performance Improvement
- Human-Animal Interaction Studies
- Milk Quality and Mastitis in Dairy Cows
- Agricultural and Food Production Studies
- Meat and Animal Product Quality
- Animal Disease Management and Epidemiology
Austral University of Chile
2013-2025
University of British Columbia
2013-2015
The objectives of this study were to describe the incidence postpartum disease and evaluate association with serum cholesterol concentrations during first 3 weeks after calving in grazing dairy cows. between non-esterified fatty acids (NEFA), β-hydroxybutyrate (BHBA), calcium diseases was also evaluated. A total 307 Holstein cows from 6 commercial herds Osorno, Chile, monitored until 21 days milk. Cases retained placenta, clinical hypocalcemia mastitis recorded by farmer using established...
In pasture-based systems, prepartum dairy cows can be exposed directly to weather conditions during the transition period. We aimed determine how temperate climatic spring and autumn calving seasons affect cows’ lying ruminating behavior in outdoor conditions. Behavior meteorological data were extracted from two external experiments carried out season season. Mixed models used effects of on daily rumination behaviors. season, high precipitation reduced time, wind speed decelerated this...
Calving is one of the most challenging and painful experiences for dairy cattle a process that involves coping with physical physiological changes, as well environmental management-related stressors. In recent years, it has been argued application cow behaviour knowledge might facilitate their efficacious management during calving. This review aims to summarise discuss current regarding behavioural changes occur around calving time. The relationship between behaviour, practices, conditions...
The periparturient period, typically defined as the period immediately before and after calving, is a challenging time for dairy cattle that must cope with physiological, metabolic endocrine changes, well variety of environmental management-related stressors. These challenges likely contribute to high incidence disease observed during weeks following parturition. Changes in behaviour around parturition can be used identify animals are ill or at risk disease. aim this review summarise current...
Forage brassicas, such as summer turnip (ST; Brassica rapa) and forage rape (FR; napus), are used supplementary crops during summer. However, studies with lactating dairy cows fed these forages limited report inconsistent productive responses. The aim of this study was to determine dry matter intake, rumen fermentation milk production responses in mid-lactation supplemented without ('ST' or 'FR') brassicas. Twelve multiparous were randomly allocated three dietary treatments a replicated 3 ×...
This study aimed to assess the effect of shelter provision during prepartum period on lying, ruminating, and feeding behavior in outdoor-housed dairy cows exposed winter weather conditions a temperate climate. We also determine whether influenced blood analytes related energy metabolism, body cleanliness, health status. In this study, 2 cohorts 12 multiparous Holstein were tested winter. Twenty-five days before their expected calving date, each cohort paired randomly assigned an open paddock...
This study aims to assess calf usage of five potential enrichment devices provided simultaneously. We used 25 weaned Holstein-Friesian calves housed in groups (five replicates), and their behavior was recorded continuously with video cameras. longitudinal observational a pen equipped mechanical fixed brush, cowhide, horizontal vertical ropes. Data collected included how many visits each object received per day, the type usage, duration visits. Calves all objects at least once, they items...
This study aimed to assess the preference and use of an artificial shelter in dairy cows managed outdoors at calving during winter. We also evaluated whether this would be influenced by weather conditions (rain, air temperature, or wind) time day calving. Two weeks before their expected date, 18 were paired based on body weight, condition score, parity, date. Each pair was assigned open paddock (42 m
Our study compared the behavior of prepartum dairy cows that either remained in an outdoor paddock until calving (OP) during winter or were moved to indoor maternity pen early (EM) late (LM) relative calving. Forty-two multiparous Holstein divided into three treatments (OP, EM, LM) and monitored from 3 weeks before 1.5 h after Cows EM LM a starting at week one expected date, respectively. We assessed cleanliness calving, immunoglobulin G concentration colostrum, vitality calves across...
Cows are affected by environmental factors associated with warm weather conditions; however, little is known about the effect of shade access especially during prepartum period dairy cows in temperate regions. This study assessed on behavior (lying, rumination, feeding, and drinking), body fat mobilization, health status outdoor-housed under summer conditions. During 3 weeks prior to calving, 24 multiparous Holstein were grouped (4 cows/group) assigned either an open corral without or until...