ListarArchivos de Zootecnia por tema "Reproducción"
Mostrando ítems 1-18 de 18
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Diámetro del folículo preovulatorio y vesícula embrionaria en yeguas árabes y pura raza española
(Universidad de Córdoba, Servicio de Publicaciones, 1993)An echographic study was made for the diameter evaluation of the preovulatory follicle and the embryonic vesicle at 20 days postfertili¬zation on 21 Arab Thoroughbred. mares and S I Spanish grouped in primiparous and ... -
Duración del periodo estral en yeguas árabes y españolas
(Universidad de Córdoba, Servicio de Publicaciones, 1985)The length of heat in Andalusian and Arabian mares, and the optimum day of breeding in the first postpartum heat, have been studied. In our results the average of all the heat was 5.78 + 1.54 days. No significant diferences ... -
Efecto del medio de cultivo y la suplementación proteica en la maduración in vitro de ovocitos bovinos
(Universidad de Córdoba, Servicio de Publicaciones, 1997)In the present work, the effects of oocyte maturation medium and protein supplementation on in vitro maturation process of immature bovine oocytes are described. Three different culture media, such as: TCM-199 medium, DME ... -
Efecto del método de selección de esperma congelado de bovino sobre los índices de fecundación y división in vitro
(Universidad de Córdoba, Servicio de Publicaciones, 1997)In the present work, the effect of two selection methods of bovine frozen sperm on in vitro fertilization and cleavage rates of in vitro matured and fertilized bovine oocytes was evaluated. Two usual sperm selection systems ... -
Eficacia reproductiva de verracos Criollos Cubanos en el cruzamiento con hembras Duroc x Hapshire
(Universidad de Córdoba, Servicio de Publicaciones, 1998)We describe in this paper the reproductive performance of Cuban Creole x (Duroc x Hampshire) cross-breed pigs. This cross-breeding system is presently under investigation for the reproductive improvement of mountain areas. ... -
Experiencias sobre inseminación artificial en hembras bovinas retintas tras tratamientos estimuladores de celo
(Universidad de Córdoba, Servicio de Publicaciones, 1995)We have realised artificial insemination oí 877 females of the Retinto cattle breed. Previously we applied three different treatments for estrus stimulation. The first and the second were induction treatments, with Syncro-Mate ... -
Factores que afectan a la edad al primer parto en el ganado vacuno de raza retinta
(Universidad de Córdoba, Servicio de Publicaciones, 1995)It is posible to get an increase of reproductive efficiency by decreasing age at first calving. In this study we show the influence of some enviromental factors that affect this parameter in Retinto cattle. 1786 first ... -
Factores que afectan a los parámetros reproductivos en el ganado vacuno de la raza retinta: duración de la gestación
(Universidad de Córdoba, Servicio de Publicaciones, 1995)This work studies the influence of some factors affecting the gestation lenght in Retinto beef cattle. The average duration of the gestation was estimated in 287.97 days, with an standard error of 0.24, and a variation ... -
Factores que afectan al intervalo entre partos en la raza retinta
(Universidad de Córdoba, Servicio de Publicaciones, 1995)The main objective of beef cattle improvement is greater profitability on farms. For this, the optimization of reproductive behavior is essential. In the present paper we have made an analysis of the average calving interval ... -
Factores que influyen en la duración de la gestación de la coneja
(Universidad de Córdoba, Servicio de Publicaciones, 1985)This is a statistical stydy of the factors which contribute to the length of the gestation of the rabbit, based on a hierarchical scheme and it"s deeped to a level of pedigree on those variates which declared a significant ... -
Influencia de la duración de la luz diaria sobre la manifestación del celo en yeguas de raza española
(Universidad de Córdoba, Servicio de Publicaciones, 1988)Following the traditional method of exploitation, for a period of four years 165 Spanish-bred mares were observed. The heats. per month from January to June and the gestation rates in each month were determined. The number ... -
Influencia de la harina de alfalfa en el rendimiento reproductivo de cerdas Landrace
(Universidad de Córdoba, Servicio de Publicaciones, 1981)Twenty sows of Landrace breed are studied on the first and second parturitions. These sows were fed with two different rations: A, with an additional 20 p.100 of cereals, and B, with 30 p.100 of alfalfa meal containing a ... -
Modificaciones en las células de Sertoli, en ratas Wistar tratadas con estradiol y acetato de trenbolona
(Universidad de Córdoba, Servicio de Publicaciones, 1985)In the present work, the effects of implants of estradiol and tren¬bolone acetate in Sertoli cells of Wistar male rats was studied. The alterations depended on action time of implants, showing large lipid droplets and ... -
Sincronización y superovulación en ganado vacuno bravo
(Universidad de Córdoba, Servicio de Publicaciones, 1986)In 7 different groups pertaining to 4 farms, we followed 4 synchronization and poliovulation protocols ánalyzing the obtained results.. We used cows of different ages as donors and as recipient 2 year old animals, previously ... -
Terapia hormonal de GnRH y PGF2a en el puerperio del ganado vacuno de leche. I. Acción en el acortamiento del ciclo reproductivo
(Universidad de Córdoba, Servicio de Publicaciones, 1992)Gonadotrophin releasing hormone (GnRH) analogue in combination with prostaglandin F2 alpha (PGF2a) was adiministered to VT in order to determine if it hastened the recovery of ovarian activity and uterine involution during ... -
Valoración del desarrollo folicular preovulatorio en yeguas de pura raza española y árabe
(Universidad de Córdoba, Servicio de Publicaciones, 1992)An echographic study was made for the morphometric evaluation of the preovu latory follicle in 33 Thoroughbred Arab mares and 66 Thoroughbred Spanish mares divided within each breed into groups according to the situation ... -
Valores de fertilidad en yeguas españolas y árabes
(Universidad de Córdoba, Servicio de Publicaciones, 1985)The influence of age and number of heats in the fertility value of Arabian and Andalusian mares have been studied. The Arabian mares have a whole fertility value 11 % higher than the Andalusian ones. The fertility is low ... -
Valores de progesterona en plasma de yeguas españolas y árabes durante el ciclo reproductor
(Universidad de Córdoba, Servicio de Publicaciones, 1986)The plasmatic progesterone levels in Arabian and Andalusian mares during the reproductive cycle have been studied. In the partum there is a significant décrease in plasmatic progesterone levels. During the heat these levels ...