Browsing by Author "Vargas Bello Perez, Einar"
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- ItemKnowledge and Perception on Animal Welfare in Chilean Undergraduate Students with Emphasis on Dairy Cattle(MDPI, 2021) Vargas Bello Perez, Einar; Obermoller Bustamante, Consuelo; Faber, Ilona; Tadich, Tamara; Toro Mujica, PaulaSimple Summary Consumer perceptions on animal welfare have been assessed, providing results that are necessary for the development of policies and legislation regarding animal welfare standards. In Latin America, societal concerns and specifically consumers' concerns about animal welfare are increasing but so far, the interest of university students on this subject has received little attention. The objectives of this study were to determine differences on knowledge and perception on animal welfare (with emphasis on dairy cattle) from undergraduate students from two universities with different missions and visions and between students from different faculties. Undergraduate students from the two main Chilean universities were surveyed. Overall, this study showed that University only affected the source of animal welfare information used by undergraduate students and some perceptions on dairy cows' welfare. On the other hand, Faculty did affect most of the variables on awareness, knowledge and perception towards animal welfare. Thus, the knowledge background provided by the faculty of students has a greater influence on their knowledge and perceptions about animal welfare than their university. The objectives of this study were to determine differences in knowledge and perception of animal welfare (with emphasis on dairy cattle) among undergraduate students from two universities with different missions and visions and between students from different faculties. One thousand surveys were obtained from Universidad de Chile (UChile; n = 500) and Pontificia Universidad Catolica de Chile (PUC; n = 500) students. The students from both universities were from the following faculties: Agronomy, Architecture, Biology, Economic Sciences, Psychology, Law, Philosophy, Basic Education, Civil Engineering and Medicine. The majority (77%) of students from both universities were aware of animal welfare. Most (56%) students understand animal welfare as the 'mental and physical state of animals'. Regardless of their faculty, around 97% of the total respondents perceived animal welfare as important for production systems. Regarding specific knowledge about cows' welfare related to milk management and behavior, students from Economic Sciences, Psychology, Law, Philosophy, Basic Education, and Civil Engineering had less (p < 0.001) self-reported knowledge about cows' basic behavior and specific management practices such as milking and were more negative in their perceptions of dairy production. Overall, results showed that the students' faculty explained most of the differences among undergraduate students in relation to their perceptions and knowledge about animal welfare. Our data is important, as undergraduate students will make purchasing and power decisions as well as having potential influence on future policies that could modify the animal production industry.
- ItemLong-Term Effects of Dietary Supplementation with Olive Oil and Hydrogenated Vegetable Oil on the Rumen Microbiome of Dairy Cows(MDPI, 2021) Cancino Padilla, Nathaly; Catalan, Natalia; Siu Ting, Karen; Creevey, Christopher J.; Huws, Sharon A.; Romero, Jaime; Vargas Bello Perez, EinarDietary lipids increase energy density in dairy cow diets and in some cases can increase beneficial fatty acids (FA) in milk and dairy products. However, the degree of FA saturation may affect the rumen microbiome. The objective of this study was to determine the long-term effects of feeding saturated (hydrogenated vegetable oil; HVO) or unsaturated (olive oil; OO) fatty acid (FA) sources on the rumen microbiome of dairy cows. For 63 days, 15 mid-lactating cows were fed with either a basal diet (no fat supplement), or the basal diet supplemented with 3% dry matter (DM), either HVO or OO. Rumen contents were collected on days 21, 42 and 63 for 16S rRNA gene sequencing using the Illumina MiSeq platform. The results reveal dominance of the phyla Firmicutes (71.5%) and Bacteroidetes (26.2%), and their respective prevalent genera Succiniclasticum (19.4%) and Prevotella (16.6%). Succiniclasticum increased with both treatments at all time points. Prevotella was reduced on day 42 in both diets. Bacterial diversity alpha or beta were not affected by diets. Predicted bacterial functions by CowPI showed changes in energy and protein metabolism. Overall, 3% DM of lipid supplementation over 63 days can be used in dairy cow diets without major impacts on global bacterial community structure.