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Registros recuperados: 12
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Although it induces synchronized ovulation, hCG reduces the fertility of Santa Ines ewes submitted to TAI Arq. Bras. Med. Vet. Zootec.
Dias,L.M.K.; Sales,J.N.S.; Viau,P.; Barros,M.B.P.; Nicolau,S.S.; Simões,L.M.S.; Alves,N.G.; Alonso,M.A.; Valentim,R.; Oliveira,C.A..
ABSTRACT The aim of this study was to evaluate hCG treatment on ovarian response and on pregnancy rate using a 9-day oestrus synchronization protocol in Santa Ines ewes. On a random oestrus cycle day, ewes received an intravaginal progesterone device (Primer-PR®, Tecnopec, Brazil). Nine days later (Day 9), 30µg of d-cloprostenol (Prolise®, Syntex, Argentina) and 250IU of eCG (Folligon®, Intervet, Brazil) were administered and the progesterone device was removed. This moment, the ewes were randomly assigned on two groups: Control Group and hCG Group. In the hCG Group, the ewes received 500IU of hCG (Vetecor®, Hertape-Calier, Spain) 24h after device removal. In the Control Group, the ewes did not receive any ovulation inductor. Control and hCG Groups ewes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Progesterone; Follicle; Ovulation; Synchronization.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100122
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Comportamiento productivo y reproductivo de ovinos de lana locales en la región de Tlatlauquitepec, Puebla. Colegio de Postgraduados
Castro González, Numa Pompilio.
El objetivo fue determinar la ganancia diaria de peso (GDP) de corderos de lana locales (criollos) y de pelo, así como, el comportamiento reproductivo de ovejas de lana locales de la región de Tlatlauquitepec, Puebla. Dos experimentos fueron conducidos: en el primero, 40 corderos locales de lana y 40 de pelo, se sometieron a pastoreo y confinamiento. El diseño experimental fue en bloques completamente al azar con arreglo factorial 2 x 2, donde el tipo genético y la alimentación fueron los factores a probar. El factor alimentación fue determinante (P<0.0001) en obtener ganancias de peso diferenciadas. La GDP fue mayor en corderos alimentados en confinamiento. El tipo genético influenció (P<0.01) la GDP donde, los corderos de pelo en pastoreo tuvieron...
Palavras-chave: Ovinos criollos; Ganancia diaria de peso; Sincronización; Creole sheep; Estro; Daily liveweight gain; Synchronization; Estrus; EDAR; Maestría Tecnológica; Desarrollo y Gestión de Sistemas Ganaderos.
Ano: 2010 URL: http://hdl.handle.net/10521/327
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Effects of long-term controlled internal drug release reuse on reproductive performance, hormone profiles, and economic profit of sheep R. Bras. Zootec.
Swelum,Ayman Abdel-Aziz; Saadeldin,Islam M.; Moumen,Abdullah F.; Ali,Mohamed; Ba-Awadh,Hani; Alowaimer,Abdullah N..
ABSTRACT Fifty-seven multiparous Awassi ewes in the breeding season were used to compare the effects of controlled internal drug release (CIDR) reuse on hormone profiles, reproductive performance, and economic production. Ewes were randomly allotted to one of three CIDR treatments: new (control), once-used, and twice-used; treatment lasted 12 days. Blood samples were collected from all groups at the time of CIDR insertion, three and six days following insertion, at withdrawal time, and at insemination. Serum estradiol (E2) and progesterone (P4) concentrations were measured. Timed insemination was performed 48 h post CIDR withdrawal in all groups. Pregnancy was diagnosed by ultrasonography at day 23 post insemination. No significant differences were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conception; Estradiol; Estrus; Progesterone; Synchronization; Twining.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100607
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Improving the Reproductive Efficiency of the Goat: Vaginal Cytology and Vulvar Biometry as Predictors of Synchronized Estrus/Breeding Time in West African Dwarf Goat International Journal of Morphology
Leigh,Olufisayo Oluwadamilare; Raheem,Ayobami Kabir; Oluwadamilare Olugbuyiro,Joseph Adebisi.
The characteristics of exfoliated vaginal cells and vulvar biometry following estrus synchronization via two injections of 5mg Lutalyse® administered 7 days apart were investigated with the aim of their possible use to predict estrus in six adult WAD does. Four adult WAD bucks recently passed as satisfactory potential breeders were also involved in the study. The animals were maintained on 12% crude protein concentrate, greens and fresh water ad libitum. All measurements in the does were taken at an interval of 24 hours for six days beginning with the day of 2nd Lutalyse® injection. The does were introduced to the bucks 48 hours after the 2nd dose of Lutalyse® and separated from them after the 6th day. The 72-96 and 96-120 hours vaginal smears of 5 does...
Tipo: Journal article Palavras-chave: Vaginal cytology; Vulva biometry; Synchronization; Lutalyse®; Predict; Estrus; Doe.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300042
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Influencia del aporte de progesterona exógena (CIDR) post-inseminación sobre la fertilidad de ovinos de las razas cruza Suffolk-Dorset. Colegio de Postgraduados
Torres Lemus, Fidel Miguel.
El objetivo fue determinar la relación entre el aporte de progesterona exógena a través de un dispositivo intravaginal (CIDR) con la fertilidad, durante el proceso de reconocimiento materno y el mantenimiento de la gestación después de la inseminación artificial. Las ovejas fueron sincronizadas mediante el uso de un dispositivo intravaginal impregnado de un progestágeno natural (CIDR), por un periodo de 9 días. Dos días antes del retiro del dispositivo se aplicó 15 mg de prostaglandina F2α, vía intramuscular. Las ovejas fueron distribuidas al azar en dos grupos, para constituir los siguientes tratamientos: 1) ovejas inseminadas sin progesterona (P4) adicional (IASP) y 2) ovejas inseminadas que recibieron progesterona exógena (P4) (IACP) a través de un...
Palavras-chave: Gestación; Embrión; Mortalidad; Synchronization; Artificial Insemination; Pregnancy; Progesterone; Ganadería; Maestría.
Ano: 2013 URL: http://hdl.handle.net/10521/2166
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L-arginina y su relación en la tasa ovulatoria en ovejas Colegio de Postgraduados
Hernández Marín, José Antonio.
El objetivo del presente estudio fue determinar si la adición de L-arginina al alimento, durante tres días previos a la inseminación, influye en la tasa ovulatoria de ovejas de pelo y de lana. Se utilizaron 72 ovejas de pelo y 49 ovejas de lana, a las cuales se les sincronizó el estro mediante dispositivos intravaginales impregnados con progesterona (CIDR, P4:0.62 g), durante nueve días y tres días antes del retiro, se les asignó aleatoriamente a uno de cuatro tratamientos: tratamiento 1 (T1): CIDR + eCG; tratamiento 2 (T2): CIDR + eCG + L-arginina 500 mg kg-1 de peso vivo; tratamiento 3 (T3): CIDR + L-arginina 500 mg kg-1 de peso vivo; y tratamiento 4 (T4): solo CIDR. No se encontraron diferencias (P>0.05) en el porcentaje de manifestaciones...
Tipo: Tesis Palavras-chave: Sincronización; Flushing; Aminoácidos neuroexcitadores; Òxido nítrico; Maestría; Ganadería; Synchronization; Neuroexciter amino acids; Nitric oxide..
Ano: 2009 URL: http://hdl.handle.net/10521/1217
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Observações sobre o comportamento de nidificação de três espécies de Podocnemis Wagler (Testudinata, Pelomedusidae) no Baixo Rio Branco, Roraima, Brasil Zoologia
Nascimento,Sebastião Pereira do.
Some aspects on nidification behavior of three species of turtles [Podocnemis unifdis (Troschel, 1848), Podocnemis sextuberculata (Cornália, 1849) and Podocnemis expansa (Schweigger, 1812)] in the northern Brazilian Amazônia are reported. The three species showed similar nidification activities.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Turtle; Behavior; Nidification; Synchronization.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000100018
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One hundred million years of interhemispheric communication: the history of the corpus callosum BJMBR
Aboitiz,F.; Montiel,J..
Analysis of regional corpus callosum fiber composition reveals that callosal regions connecting primary and secondary sensory areas tend to have higher proportions of coarse-diameter, highly myelinated fibers than callosal regions connecting so-called higher-order areas. This suggests that in primary/secondary sensory areas there are strong timing constraints for interhemispheric communication, which may be related to the process of midline fusion of the two sensory hemifields across the hemispheres. We postulate that the evolutionary origin of the corpus callosum in placental mammals is related to the mechanism of midline fusion in the sensory cortices, which only in mammals receive a topographically organized representation of the sensory surfaces. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Commissures; Evolution; Interhemispheric transfer; Lateralization; Synchronization.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000400002
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Prostaglandin F2α or estradiol benzoate to induce ovulation in timed artificially inseminated dairy cows PAB
Pfeifer,Luiz Francisco Machado; Siqueira,Luiz Gustavo Bruno; Arashiro,Eduardo Kenji Nunes; Castro,Natália Ávila de; Viana,João Henrique Moreira.
Abstract: The objective of this work was to compare two types of ovulation inducers - estradiol benzoate (EB group) or prostaglandin F2α (PG group) -, in postpartum dairy cows subjected to timed artificial insemination (TAI). Lactating Holstein-Gir crossbred cows (n=118) with 60 to 120 days of milk production were used in this study. All cows were treated with an intravaginal progesterone-releasing device (CIDR) plus 2 mg of estradiol benzoate (EB) on day 0. The CIDR inserts were removed on day 9, and all cows received 500 µg sodium cloprostenol. Twenty-four hours after CIDR removal, cows were randomly assigned into two treatment groups and were given either 1 mg of EB i.m. (EB group) or 500 µg sodium cloprostenol i.m. (PG group). TAI were performed at 52...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artificial insemination; Cattle; Estrus; Synchronization; Withdrawal period..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000600738
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Reproductive performance of fixed-time artificial insemination in swine and factors for the technology success Ciência Rural
Quirino,Monike; Pinheiro,Ana Raquel Almeida; Santos,Joabel Tonellotto dos; Ulguim,Rafael da Rosa; Mellagi,Ana Paula Gonçalves; Bortolozzo,Fernando Pandolfo.
ABSTRACT: Fixed-time artificial insemination (FTAI) is a reproductive technology that aids in obtaining an appropriate time to perform single artificial insemination (AI), thus reducing the number of inseminations per sow bred. FTAI protocols can either be based on estrus detection or day of weaning, aiming to synchronize ovulation using ovulation inducers. The protocols involving estrus detection usually employ porcine luteinizing hormone (pLH) as an inducer and, in general, satisfactory reproductive performance is observed. For protocols based on weaning day, the main hormone used is analog of gonadotropin-releasing hormone such as triptorelin and buserelin. Regardless of the protocol, the number of piglets born is usually not affected by FTAI. However,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ovulation; Synchronization; Single insemination; Sows; Gilts.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000200700
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Sincronización del estro con diferentes dosis de progestageno FGA en ovejas Colegio de Postgraduados
Cedillo Galindo, Nelly.
Se sincronizó estros en ovinos utilizando diferentes dosis del progestágeno acetato de fluorogestona (FGA). Se evaluaron la presentación y duración del estro; inicio, duración y amplitud del pico preovulatorio de LH, así como la concentración promedio de progesterona y la tasa de gestación. Se asignaron de manera aleatoria tres tratamientos a 30 ovejas, T1: esponja completa (n=10), T2: ½ esponja (n=10) y T3: ¼ de esponja (n=10). Los resultados para presentación del estro de T1, T2 y T3 fueron 28.7±1.6, 37.8±2.6 y 28.5±3.5 h, respectivamente (media ± error estándar; p>0.05); inicio del estro para T1, T2 y T3 fue 28.7±1.6, 37.8±2.6 y 28.5±3.4 h (p>0.05); los resultados de inicio del pico preovulatorio de LH para T1, T2 y T3 fueron 28±3.4,...
Tipo: Tesis Palavras-chave: Sincronización; Ovinos; LH; Progesterona; FGA; Maestría; Ganadería; Synchronization; Ewes; LH; Progesterone; FGA.
Ano: 2008 URL: http://hdl.handle.net/10521/1234
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Somatotropina bovina recombinante (rbST) en la sincronización de estros y prolificidad de ovejas pelibuey. Colegio de Postgraduados
Sosa Pérez, Gustavo.
El objetivo del presente estudio fue determinar si la administración de la Somatotropina Bovina Recombinante (rbST) dos días antes del retiro del progestágeno, influye en la sincronización de estros y prolificidad en ovejas Pelibuey. Se utilizaron 180 ovejas de 4±0.32 años de edad, a las cuales se les inserto un dispositivo intravaginal impregnado con progesterona (CIDR P4 0.3 g) por nueve días. Dos días antes del retiro del dispositivo, las ovejas se asignaron aleatoriamente a tres tratamientos: (T1 n=60; CIDR), (T2 n=60; CIDR+250 mg de rbST), y (T3 n=60; CIDR+ 300 UI de gonadotropina coriónica equina (eCG) 48 horas antes del retiro del progestágeno). No se observaron diferencias (p>0.05) en la respuesta a tratamiento en la sincronización de estros,...
Palavras-chave: Ovejas pelibuey; Sincronización; RbST; Partos múltiples; Sheep pelibuey; Synchronization; Multiple births; Ganadería; Maestría.
Ano: 2012 URL: http://hdl.handle.net/10521/1698
Registros recuperados: 12
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