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dc.contributor.advisorFernández-Van Cleve, John
dc.contributor.authorAlvarado-Narváez, Angélica M.
dc.date.accessioned2018-11-21T10:03:00Z
dc.date.available2018-11-21T10:03:00Z
dc.date.issued2015
dc.identifier.urihttps://hdl.handle.net/20.500.11801/1433
dc.description.abstractThis study evaluated the effects of a strategic conductive cooling system (SCCS) on the pregnancy rate of dairy cattle in an ovulation synchronization program during two seasons, autumn and summer. Cows were distributed according to milk production, days in milk, lactation number, weight and type of hair (slick or normal), while heifers were grouped by weight and hair type. All animals underwent an altered OvSynch synchronization protocol and assigned to one of two groups: SCCS and no-SCCS. After the synchronization protocol, all animals were inseminated at fixed time. Pregnancy confirmation was made 32 days following insemination. No significant differences in pregnancy rates were observed among seasons with 39 and 29% pregnancy rate in autumn and summer, respectively. No significant differences in pregnancy rates between SCCS and control group were observed (36 versus 30%, respectively). Heifers showed a higher pregnancy rate (P = 0.0013) than cows (49 versus 17%, respectively).
dc.description.abstractSe evaluó el efecto de un sistema de enfriamiento conductivo estratégico (SECE) sobre la tasa de preñez en bovinos lecheros bajo programa alterado de sincronización de ovulación (OvSynch) en dos épocas. Las vacas fueron distribuidas de acuerdo a producción de leche, número de lactancias, peso y tipo de pelo, y las novillas agrupadas por peso y tipo de pelo. Estas fueron asignados a uno de dos grupos: SECE y no-SECE. Luego de finalizado el protocolo de sincronización, los animales fueron inseminados a tiempo fijo. La preñez fue confirmada a los 32 días pos-inseminación. No hubo diferencia significativa en la tasa de preñez entre otoño y verano, con 39% y 29, respectivamente. Tampoco se observó una diferencia significativa en la tasa de preñez entre animales bajo SECE y grupo testigo (36% versus 30%, respectivamente). Las novillas presentaron una tasa de preñez mayor (P=0.0013) realtivo a las vacas (49% versus 17%, respectivamente).
dc.language.isoesen_US
dc.subjectOvSynchen_US
dc.subjectGanado lecheroen_US
dc.subjectEstrés por caloren_US
dc.titleEfecto de un sistema de enfriamiento conductivo estratégico sobre la tasa de preñez bajo un tratamiento modificado de OvSynch en ganado lechero bajo estrés por caloren_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2015 Angélica M. Alvarado Narváezen_US
dc.contributor.committeeCurbelo Rodríguez, Jaime E.
dc.contributor.committeeSánchez Rodríguez, Héctor L.
dc.contributor.committeeLatorre, José R.
dc.contributor.representativePadilla Vélez, David
thesis.degree.levelM.S.en_US
thesis.degree.disciplineAnimal Industryen_US
dc.contributor.collegeCollege of Agricultural Sciencesen_US
dc.contributor.departmentDepartment of Animal Scienceen_US
dc.description.graduationSemesterFallen_US
dc.description.graduationYear2015en_US


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