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Mostrando ítems 1-20 de 26
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Detrimental effects of non-functional spermatozoa on the freezability of functional spermatozoa from boar ejaculate
(PLOS One, 2012)In the present study, the impact of non-functional spermatozoa on the cryopreservation success of functional boar spermatozoa was evaluated. Fifteen sperm-rich ejaculate fractions collected from five fertile boars were ... -
Citrus huanglongbing associated with ‘Candidatus liberibacter asiaticus’ present in the northern region of Costa Rica but has not been detected in other citrus-growing areas
(American Phytopathological Society, 2015-12)Since 2011, citrus Huanglongbing (HLB, ex-greening) disease has been detected in Los Chiles, Costa Rica, close to the Nicaraguan border, by the State Phytosanitary Service (Servicio Fitosanitario del Estado; SFE) and by ... -
Morphometric comparison by the ISAS® CASA-DNAf system of two techniques for the evaluation of DNA fragmentation in human spermatozoa
(Instituto Tecnológico de Costa Rica. Escuela de Agronomía. Sede San Carlos., 2016)DNA fragmentation has been shown to be one of the causes of male infertility, particularly related to repeated abortions, and different methods have been developed to analyze it. In the present study, two commercial kits ... -
Effect of an energy supplementation, weaning and oestrous synchronisation on ovarian activity and ovulation in early postpartum primiparous Bos indicus cows raised in the tropics of Costa Rica
(Animal Production Science, 2016)To evaluate the effect of an energy supplementation, 26 postpartum Bos indicus cows were assigned either to receive an energy diet supplementation (n = 11, SSD) or no supplementation (n = 15, NSSD). Cows in the SSD ... -
Morphometry and subpopulation structure of Holstein bull spermatozoa: Variations in ejaculates and cryopreservation straws
(2016)Sperm quality is evaluated for the calculation of sperm dosage in artificial reproductive programs. The most common parameter used is motility, but morphology has a higher potential as a predictor of genetic quality. ... -
Resultados de la implementación de tecnologías solares en sistemas de producción agropecuaria en Costa Rica
(2017)La alta dependencia por los combustibles fósiles insta a buscar alternativas que permitan una producción más limpia y que contribuyan a mitigar los efectos del cambio climático. El objetivo del presente trabajo consiste ... -
Los sistemas CASA como solución en los centros de producción de dosis seminales porcinas
(UTN Informa, 2017)El objetivo de la realización de un análisis espermático en cerdos consiste en tratar de estimar el nivel de fertilidad de la muestra analizada. Históricamente, se han tratado de definir criterios de corte para determinar ... -
Evaluation of sustainability and the impact of the agriculture styles of the chilean coastal dry lands.
(2017)La agricultura ha progresado ininterrumpidamente, pasando de la utilización de recursos naturales gratuitos al uso creciente de recursos fósiles como fuentes energéticas. Si bien la agricultura depende fundamentalmente de ... -
La selección de cultivares como herramienta para el desarrollo de productos mínimamente procesados en fresco
(Universidad Nacional Bastidas de Arurimac, 2018)Actualmente, los consumidores tienen a su disposición una gran variedad de productos con diferente grado de elaboración. Dentro de estos productos sobresalen aquellos clasificados dentro de la IV Gama, también conocidos ... -
Evaluación de la cinética y movilidad espermática de verracos en condiciones tropicales
(Actas Iberoamericanas de Conservación Animal (AICA), 2018)Sperm motility is linked to the energy level of the reproductive cell. The aim was to determine the influence of breed on reproductive variables of semen quality, kinetics and motility. Data were collected from 524 ... -
Comparison of three different staining methods for the morphometric characterization of Alpaca (Vicugna pacos) sperm, using ISAS® CASA-Morph system
(Nova Biologica Reperta, 2019)Sperm morphometry is a part of the semen analysis based on CASA technology and has shown a big role in the prediction of male fertility. This analysis implies the use of stain techniques, although it has been shown that ... -
Optimization CASA-Mot analysis of donkey sperm: optimum frame rate and values of kinematic variables for different counting chamber and fields
(Animals, 2020)A reliable sperm motility exam is important for semen analysis and breeding soundness examination. Different parameters can affect the Computer Assisted Sperm Analysis (CASA) motility results. Today, new high-resolution ... -
Kinematic sub-populations in bull spermatozoa: a comparison of classical and bayesian approaches
(Biology, 2020)The ejaculate is heterogenous and sperm sub-populations with different kinematic patterns can be identified in various species. Nevertheless, although these sub-populations are statistically well defined, the statistical ... -
The application of computer-assisted semen analysis (CASA) technology to optimise semen evaluation. A review
(Journal of Animal and Feed Sciences, 2020)Currently, artificial insemination (AI) is the most applied technique for assisted reproduction in the livestock industry. The traditional analysis of seminal quality includes the evaluation of concentration and motility ... -
Kinematic sub-populations in bull spermatozoa: a comparison of classical and bayesian approaches
(Biology 2020, 2020-06-26)The ejaculate is heterogenous and sperm sub-populations with different kinematic patterns can be identified in various species. Nevertheless, although these sub-populations are statistically well defined, the statistical ... -
Caracterización morfométrica y clasificación de los espermatozoides de vicuña (Vicugna vicugna) usando el sistema ISAS® CASA-Morph
(Spermova, 2021)he aim of the study was to determine the morphological and morphometric characteristics of the vicuña sperm (Vicugna vicugna), looking for possible subpopulations in its structure. Semen was collected by electroejaculation ... -
Relationship between fertility traits and kinematics in clusters of boar ejaculates
(Biology, 2021)Swine reproduction efficiency is determined by the fertility potential of the sow and sperm quality. The objective of this study is to compare boar sperm motility and kinematic features to evaluate their relationships ... -
Morfometría y subpoblaciones de espermatozoides de llama (Lama glama) usando el sistema ISAS® CASA-Morph
(Revistas de Investigación y Veterinaria del Perú (RIVEP), 2021)El objetivo del estudio fue determinar la existencia de subpoblaciones espermáticas según la morfometría de los espermatozoides de llama, utilizando un sistema CASA Morph. Se colectó semen de cuatro llamas Q’ara de 4-6 ... -
Condiciones óptimas del análisis CASA-Mot del semen de verraco: efecto de la tasa de fotogramas para diferentes cámaras y campos de recuento espermático
(2021)El objetivo del estudio fue determinar el efecto de la tasa de fotogramas sobre diferentes profundidades de cámara de recuento espermático en semen de verraco y analizar la distribución de los espermatozoides en los ... -
A new approach of sperm motility subpopulation structure in donkey and horse
(Frontiers in Veterinary Science, 2021)This study aimed to characterize the sperm kinematic values with high frames per second, to define the subpopulation structure of a horse and a donkey and compare them. A total of 57 fresh semen ejaculates (26 Spanish ...