Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 17
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Amplitude of the plasma melatonin nycthemeral rhythms is not associated with the dates of onset and offset of the seasonal ovulatory activity in the Ile-de-France ewe Animal Physiology
Zarazaga, L. A.; Malpaux, B.; Chemineau, P..
We investigated if absolute (nocturnal) or relative (ratio nocturnal/diurnal) plasma melatonin concentrations were associated with the seasonal ovulatory activity in Ile-de-France ewes. Ninety-six and 121 ewes in two different groups of the same flock were used to determine the potential existence of a relationship between melatonin concentrations at the summer and winter solstices, and the dates of onset and offset of the ovulatory activity, respectively. Dates of the first and last ovulations were estimated by assaying progesterone in plasma samples taken once weekly. Mean ± SEM (1) plasma melatonin concentrations at the summer solstice and at the winter solstice were 302.4 ± 19.4 and 412.0 ± 18.7 pg/ml, respectively, (2) date of onset of the breeding...
Tipo: Journal (Paginated) Palavras-chave: QH426 Genetics; QP Physiology.
Ano: 2003 URL: http://phy043.tours.inra.fr:8080/archive/00000031/
Imagem não selecionada

Imprime registro no formato completo
Changes in the 5-­HT2 A receptor system in the pre-mammillary hypothalamus of the ewe are related to regulation of LH pulsatile secretion by an endogenous circannual rhythm Animal Physiology
Chemineau, P.; Daveau, A.; Pelletier, J.; Malpaux, B.; Karsch, F.; Viguie, C..
Background: We wanted to determine if changes in the expression of serotonin 2A receptor(5HT2 A receptor) gene in the premammillary hypothalamus are associated with changes in reproductive neuroendocrine status. Thus, we compared 2 groups of ovariectomized­estradiol­ treated ewes that expressed high vs low LH pulsatility in two different paradigms (2 groups per paradigm): (a) refractoriness (low LH secretion) or not (high LH secretion) to short days in pineal­ intact Ile­de­France ewes (RSD) and (b) endogenous circannual rhythm (ECR) in free­running pinealectomized Suffolk ewes in the active or inactive stage of their reproductive rhythm. Results: In RSD ewes, density of 5HT2 A receptor mRNA (by in situ hybridization) was significantly higher in the...
Tipo: Journal (On-line/Unpaginated) Palavras-chave: RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry; QP Physiology.
Ano: 2003 URL: http://phy043.tours.inra.fr:8080/archive/00000008/
Imagem não selecionada

Imprime registro no formato completo
Concentrations of estradiol in ewe cerebrospinal fluid are modulated by photoperiod through pineal-dependent mechanisms Animal Physiology
Thiery, J.C.; Lomet, D.; Shumacher, M.; Liere, P.; Tricoire, H.; Locatelli, A.; Delagrange, P.; Malpaux, B..
In the ewe, seasonal anestrus results from an increased responsiveness of the hypothalamus to the negative feedback of estradiol (E2) on the gonadotropic axis under long-day conditions. However, this seasonal effect could also depend upon variable uptake of steroids by the brain.The aim of the present experiment was to compare the concentration of E2 in the blood plasma and in the cerebrospinal fluid (CSF) from the third ventricle in groups of ovariectomized, estradiol treated ewes maintained under short day (SD) or long day (LD) conditions and to study the involvement of the pineal gland in this photoperiodic regulation. Pinealectomized and sham-operated ewes were equipped with an intracerebral cannula to sample the cerebrospinal fluid (CSF). The plasma...
Tipo: Journal (Paginated) Palavras-chave: QP Physiology.
Ano: 2006 URL: http://phy043.tours.inra.fr:8080/archive/00000153/
Imagem não selecionada

Imprime registro no formato completo
Estacionalidad reproductiva en pequenos rumiantes: mecanismos fisiologicos y tecnicas para la induccion de una actividad sexual a cintra-estacion Animal Physiology
Chemineau, P.; Morello, H.; Delgadillo, J.A.; Malpaux, B..
Resumen Los pequeños rumiantes presentan, como sus ancestros salvajes, un período de reposo sexual estacional de duración e intensidad variable entre razas. Ambos sexos tienen una actividad sexual (espermatogénesis en el macho y actividades ovulatoria y estral en la hembra) mínima en primavera y verano y máxima en otoño e invierno. Esta estacionalidad resulta de una combinación, aún mal conocida, entre un ritmo endógeno circanual y la interpretación por el sistema nervioso central de la duración de la noche, vía la secreción de melatonina de origen pineal. Los tratamientos « fotoperiódicos »están apoyados sobre principios simples : alternancia entre fotoperíodos, iluminación de la fase fotosensible, utilización de melatonina para días cortos...
Tipo: Conference Paper Palavras-chave: QP Physiology.
Ano: 2003 URL: http://phy043.tours.inra.fr:8080/archive/00000029/
Imagem não selecionada

Imprime registro no formato completo
Expression of seasonality in Merinos d'Arles ewes of different genotypes at he MT1 melatonin receptor gene Inra
Teyssier, J.; Migaud, M.; Debus, N.; Maton, C.; Tillard, E.; Malpaux, B.; Chemineau, P.; Bodin, L..
Tipo: Journal Article Palavras-chave: SHEEP; SEASONALITY; OVULATORY ACTIVITY; MELATONIN RECEPTOR GENE; FEEDING LEVEL.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011260aa052&uri=/notices/prodinra1/2011/02/
Imagem não selecionada

Imprime registro no formato completo
Genetic parameters of spontaneous spring ovulatory activity in Merinos d'Arles sheep Inra
Hanocq, E.; Bodin, L.; Thimonier, J.; Teyssier, J.; Malpaux, B.; Chemineau, P..
Les paramètres génétiques de l’activité ovulatoire spontanée au printemps ont été estimés en race Mérinos d’Arles dans le système d’élevage pastoral traditionnel (transhumance estivale) du sud-est de la France. Le dosage de la progestérone plasmatique dans deux prélèvements sanguins effectués à 8-10 j d’intervalle a permis de déterminer l’activité ovulatoire des brebis. 1887 performances d’activité ovulatoire ont été enregistrées en 1995, 1996 et 1997, sur 933 brebis issues de 176 béliers. Le «statut physiologique » (antenaises, brebis adultes avec ou sans mise bas à l’automne précédent), l’âge et le poids au moment de la lutte des brebis ont des effets très significatifs sur l’activité ovulatoire. Ils ont été pris en compte dans le modèle animal...
Tipo: Journal Article Palavras-chave: SAISONNEMENT; RACE OVINE MERINOS D'ARLES; REPRODUCTION; PARAMETRE GENETIQUE; OVULATION; SELECTION.
Ano: 1999 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9900007841075963&uri=/notices/prodinra1/2007/07/
Imagem não selecionada

Imprime registro no formato completo
GPR50 is the mammalian ortholog of Mel1c: Evidence of rapid evolution in mammals Inra
Dufourny, L.; Levasseur, A.; Migaud, M.; Callebaut, I.; Pontarotti, P.; Malpaux, B.; Monget, P..
Tipo: Journal Article Palavras-chave: GENE GPR50; MELATONINE; RECEPTEUR A LA MELATONINE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200823b56f40&uri=/notices/prodinra1/2008/10/
Imagem não selecionada

Imprime registro no formato completo
Induction of sexual activity in lactating anovulatory female goats using male goats treated only with artificially long days Animal Physiology
Delgadillo, J.A.; Flores, J.A.; Veliz, F. G.; Hernandez, H. F.; Duarte, G.; Vielma, J.; Poindron, P.; Chemineau, P.; Malpaux, B..
Two experiments were conducted to determine the response of Creole male goats treated with long days and melatonin implants, and the response of the anovulatory does to male effect using males treated only with artificially long days. All animals were allocated to open sheds. In Exp. 1, one group of males was under natural photoperiod (CG; n = 7); the second group was submitted to 2.5 mo of long days followed by the insertion of two s.c. melatonin implants (LD+MEL; n =7); the third group was subjected only to 2.5 mo of long days (LD; n = 7). Testicular weight was measured every 2 wk. Plasma testosterone concentrations were determined weekly. A treatment × time interaction was detected (P < 0.001) for testicular weight and plasma testosterone...
Tipo: Journal (Paginated) Palavras-chave: QP Physiology.
Ano: 2002 URL: http://phy043.tours.inra.fr:8080/archive/00000009/
Imagem não selecionada

Imprime registro no formato completo
Induction of sexual activity of male creole goats in subtropical northern Mexico using long days and melatonin Animal Physiology
Delgadillo, J.A.; Carillo, E.; Moran, J.; Duarte, G.; Chemineau, P.; Malpaux, B..
The aim of this study was to determine whether the sexual activity of local male Creole goats in subtropical Mexico can be induced during the non­ breeding season by a long­day treatment followed by insertion of two melatonin implants. The experiment was carried out in the Laguna region in the State of Coahuila, Mexico (26°N). Fourteen male goats were allocated to two balanced groups (n = 7 each) according to body and testicular weights. Males were kept to­gether in two separate groups and fed lucerne hay for ad libitum intake and 300 g of commercial concentrate and had free access to water and mineral blocks. The control group remained in open sheds under natural photoperiod and ambient temperature conditions. The experimental group was placed in a...
Tipo: Journal (Paginated) Palavras-chave: QP Physiology.
Ano: 2001 URL: http://phy043.tours.inra.fr:8080/archive/00000011/
Imagem não selecionada

Imprime registro no formato completo
Innovations et performances environnementales en production caprine et ovine : Expertise Elevage-Environnement à l’INRA Inra
Bocquier, F.; Benoit, M.; Laignel, G.; Dedieu, B.; Cournut, S.; Fiorelli, C.; Jouven, M.; Moulin, C.H.; Aubron, C.; Lurette, A.; Lapeyronie, P.; Hassoun, P.; Meuret, M.; Agreil, C.; Napoleone, M.; Hoste, H.; Friggens, N.; Tichit, M.; Gonzalez Garcia, E.; Hazard, D.; François, D.; Pellicer Rubio, M.; Guillouet, P.; Boissard, K.; Fabre-Nys, C.; Debus, N.; Teyssier, J.; Tournadre, H.; Migaud, M.; Malpaux, B.; Chemineau, P.; Bodin, L.; Prache, S.; Bouix, J.; Barillet, F.; Boutonnet, J.P.; Chia, E.; Lasseur, J.; Etienne, M.; Gibon, A.; Choisis, J.P.; Labatut, J.; Paoli, J.C.; Santucci, P..
Les systèmes d’élevage ovins et les caprins, comme les autres productions animales, sont confrontés aux multiples défis environnementaux : limiter les nuisances et contribuer positivement à l’entretien ou à l’amélioration du milieu. Les travaux de l’INRA, et de ses partenaires, se sont largement impliqués dans ces questions en considérant ces élevages de petits ruminants comme faisant partie d‘agroécosystèmes complexes. Cette synthèse collective rassemble, en privilégiant les niveaux d’approche, les actions dans lesquels l’INRA intervient. Considérant tout d’abord les grandes tendances sur les effectifs d’animaux et leur répartition géographique, les adaptations ou les disparitions de ces élevages se repèrent par les approches technico-économiques. Dans ce...
Tipo: Journal Article Palavras-chave: SHEEP; GOAT; SMALL-RUMINANT; MEAT PRODUCTION; DAIRY PRODUCTS; FARMING SYSTEM; ORGANIC FARMING; CONCENTRATE; FERTILIZERS; HORMONES; SEASONAL BREEDING; GRAZING; NATURAL PASTURES; RANGELANDS; PASTORAL RESOURCE; SYLVO-PASTORAL; TRANSHUMANCE; SOIL FERTILITY; BIODIVERSITY; ECOSYSTEMIC SERVICE; GLOBAL EFFICIENCY; GREENHOUSE GAS; TERRITORIES; LANDSCAPE; LABOUR; INNOVATION; INVENTION TRANSFER; ANIMAL SELECTION; PRECISION FARMING; ECOLOGICAL INTENSIFICATION; MULTIDISCIPLINARY RESEARCH..
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201176bcaa27&uri=/notices/prodinra1/2011/04/
Imagem não selecionada

Imprime registro no formato completo
Neuroanatomical organization of gonadotropin-releasing hormone neurons during the oestrus cycle in the ewe Inra
Batailler, M.; Caraty, A.; Malpaux, B.; Tillet, Y..
Tipo: Journal Article Palavras-chave: NEUROANATOMIE; CYCLE OESTRIEN; GNRH; LH; NEURONE; OESTROGENE; PLASTICITE; PHASE FOLLICULAIRE; PHASE PROGESTATIVE; REPRODUCTION.
Ano: 2004 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0500034004110592&uri=/notices/prodinra1/2009/11/
Imagem não selecionada

Imprime registro no formato completo
Neuroendocrine interactions and seasonality Animal Physiology
Thiery, J.C.; Chemineau, P.; Hernandez, X.; Migaud, M.; Malpaux, B..
Abstract Sheep in temperate latitudes are seasonal breeders. Of the different seasonal cues, photoperiod is the most reliable parameter and is used by animals as an indication of the time of the year to synchronize endogenous annual rhythms of reproduction and physiology. The photoperiodic information is transduced into neuroendocrine changes through variations in melatonin secretion from the pineal gland. Melatonin triggers variations in the secretion of luteinizing hormone-releasing hormone, luteinizing hormone and follicle stimulating hormone (LHRH/LH/FSH) responsible for seasonal changes in reproductive activity. In female sheep, the seasonal changes in the hormonal LH pattern mainly reflect an increase in the negative feedback exerted by estradiol...
Tipo: Journal (Paginated) Palavras-chave: QP Physiology.
Ano: 2002 URL: http://phy043.tours.inra.fr:8080/archive/00000045/
Imagem não selecionada

Imprime registro no formato completo
Photoperiodic requirements for timing onset and duration of the breeding season of the ewe : synchronization of an endogenous rhythm of reproduction Inra
Wayne, N.L.; Malpaux, B.; Karsch, F.J..
A study was conducted to test the hypothesis that different portions of the annual photoperiodic cycle play different roles in timing the breeding season of the ewe, Ovis aries, an animal in which an endogenous rhythm generates the seasonal reproductive transitions. Adult female sheep were pinealectomized to disrupt transduction of photoperiodic cues at 4 times of the year (summer and winter solstices, vernal and autumnal equinoxes), and the effects on seasonal reproductive neuroendocrine activity were evaluated. Time of pinealectomy greatly influenced the subsequent seasonal reproductive cycle such that the following inferences are possible. Lengthening days between the winter and summer solstices synchronize reproductive onset to the appropriate time of...
Tipo: Journal Article Palavras-chave: PHOTOPERIODE; RHYTHME CIRCANNUEL; SAISON DE REPRODUCTION; CYCLE SEXUEL; SYNCHRONISATION; GLANDE PINEALE CIRCANNUAL RHYTHM; PHOTOPERIOD; PINEAL GLAND; SEASONAL BREEDING.
Ano: 1990 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9100009746019450&uri=/notices/prodinra1/2010/11/
Imagem não selecionada

Imprime registro no formato completo
Positive correlation between the body weight of anestrous goats and their response to the male effect with sexually active bucks Inra
Véliz, F.G.; Poindron, P.; Malpaux, B.; Delgadillo, J.A..
Tipo: Journal Article Palavras-chave: CARACTERE SAISONNIER; BIOSTIMULATION; INDUCTION D'OESTRUS; POIDS VIF; EFFET MALE; POIDS CORPOREL; ACTIVITE SEXUELLE; VARIATION SAISONNIERE; ANOESTRUS SAISONNIER TEASING; BODY CONDITION; SUBTROPICS.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200720e70f23&uri=/notices/prodinra1/2008/01/
Imagem não selecionada

Imprime registro no formato completo
Seasonality of reproduction and production in farm fishes, birds and mammals Animal Physiology
Chemineau, P.; Malpaux, B.; Brillard, J.P.; Fostier, A..
A very large majority of farm animals express seasonal variations in their production traits, thus inducing seasonal availability of fresh derived animal products (meat, milk, cheese and eggs). This pattern is in part the consequence of the farmer’s objective to market his products in the most economically favourable period. It may also be imposed by the season-dependent access to feed resources, as in ruminants, or by the specific requirements derived from adaptation to environmental conditions such as water temperature in fish. But seasonal variations in animal products are also the consequence of constraints resulting from the occurrence of a more or less marked seasonal reproductive season in most farm animal species including fish, poultry and...
Tipo: Journal (Paginated) Palavras-chave: QP Physiology.
Ano: 2007 URL: http://phy043.tours.inra.fr:8080/archive/00000396/
Imagem não selecionada

Imprime registro no formato completo
The PDZ protein Mupp1 promotes Gi coupling and signalling of the MT1 melatonin receptor Inra
Guillaume, J.L.; Daulat, A.M.; Maurice, P.; Levoye, A.; Migaud, M.; Brydon, L.; Malpaux, B.; Borg-Capra, C.; Jokers, R..
Intracellular signaling events are often organized around PDZ (PSD-95/Drosophila Disc large/ZO-1 homology) domain-containing scaffolding proteins. The ubiquitously expressed multi-PDZ protein MUPP1, which is composed of 13 PDZ domains, has been shown to interact with multiple viral and cellular proteins and to play important roles in receptor targeting and trafficking. In this study, we show that MUPP1 binds to the G protein-coupled MT1 melatonin receptor and directly regulates its Gi-dependent signal transduction. Structural determinants involved in this interaction are the PDZ10 domain of MUPP1 and the valine of the canonical class III PDZ domain binding motif DSV of the MT1 carboxyl terminus. This high affinity interaction (Kd ∼ 4 nm), which is...
Tipo: Journal Article Palavras-chave: MELATONINE; RECEPTEUR A LA MELATONINE; PROTEINE G; BIOPSIE CELLULAIRE; MEMBRANE CELLULAIRE; CELLULE MUPP1.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008e20c4e99&uri=/notices/prodinra1/2010/11/
Imagem não selecionada

Imprime registro no formato completo
Variability of plasma melatonin level in pony mares (Equus caballus), comparison with the hybrid: mules and with jennies (Equus asinus) Inra
Guillaume, D.; Zarazaga, L.A.; Malpaux, B.; Chemineau, P..
Tipo: Journal Article Palavras-chave: MULE; MELATONINE; PHOTOPERIODE; VARIABILITE GENETIQUE.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200794622b76&uri=/notices/prodinra1/2008/01/
Registros recuperados: 17
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional