Search Results - "B. MALPAUX"

Melatonin from Cerebrospinal Fluid but Not from Blood Reaches Sheep Cerebral Tissues Under Physiological Conditions by Legros, C., Chesneau, D., Boutin, J. A., Barc, C., Malpaux, B.

“…The pineal gland secretes melatonin (MLT) that circulates in the blood and cerebrospinal fluid (CSF). We provide data to support the hypothesis that, in sheep…”
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Continuous light after 2 months of long days stimulates ram testis volume and increases fertility in spring by Chesneau, D., Guillaume, D., Chemineau, P., Malpaux, B.

“…Seasonal reproduction is one of the major biotechnical and economic constraints of sheep production in temperate latitudes. Treatments using extra light…”
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Continuous light after 2 months of long days stimulates ram testis volume and increases fertility in spring–CORRIGENDUM by Chesneau, D., Guillaume, D., Chemineau, P., Malpaux, B.

“…After centrifugation and elimination of the supernatant a second washing with 2 ml of a solution of polyetylene glycol at 60 g/l was performed, the remaining…”
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Seasonality of Reproduction in Mammals: Intimate Regulatory Mechanisms and Practical Implications by Chemineau, P, Guillaume, D, Migaud, M, Thiéry, JC, Pellicer-Rubio, MT, Malpaux, B

“…Farm mammals generally express seasonal variations in their production traits, thus inducing changing availability of fresh derived animal products (meat, milk…”
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The end of a myth: cloning and characterization of the ovine melatonin MT2 receptor by Cogé, F, Guenin, SP, Fery, I, Migaud, M, Devavry, S, Slugocki, C, Legros, C, Ouvry, C, Cohen, W, Renault, N, Nosjean, O, Malpaux, B, Delagrange, P, Boutin, JA

“…Background and purpose:  For many years, it was suspected that sheep expressed only one melatonin receptor (closely resembling MT1 from other mammal species)…”
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Reproductive seasonality in female goats adapted to a subtropical environment persists independently of food availability by Duarte, G., Flores, J.A., Malpaux, B., Delgadillo, J.A.

“…The aim of this study was to determine whether the seasonal change in food availability provides a predictive cue that synchronizes the breeding season in…”
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Seasonality of reproduction and production in farm fishes, birds and mammals by 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…”
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Effects of Photoperiod on Kisspeptin Neuronal Populations of the Ewe Diencephalon in Connection with Reproductive Function by Chalivoix, S., Bagnolini, A., Caraty, A., Cognié, J., Malpaux, B., Dufourny, L.

“…Kisspeptin (Kiss) is a key regulator of reproductive function in both prepubertal and adult mammals. Its expression appears to vary throughout the year in…”
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Effect of artificial long days and/or melatonin treatment on the sexual activity of Mediterranean bucks by Zarazaga, L.A., Gatica, M.C., Celi, I., Guzmán, J.L., Malpaux, B.

“…The aim of this work was to determine whether treatments using photoperiod (long days) and/or exogenous melatonin are effective in enhancing reproductive…”
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High melatonin concentrations in third ventricular cerebrospinal fluid are not due to Galen vein blood recirculating through the choroid plexus by Skinner, D C, Malpaux, B

“…Melatonin has been implicated in several neurotropic effects, but few studies have investigated the bioavailability of melatonin in the brain. The discovery of…”
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Effect of melatonin implants on sexual activity in Mediterranean goat females without separation from males by Zarazaga, L.A., Gatica, M.C., Celi, I., Guzmán, J.L., Malpaux, B.

“…This work was designed to determine whether melatonin treatment at the spring equinox can induce reproductive activity in goats without separation from males…”
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Melatonin Activates Brain Dopaminergic Systems in the Eel with an Inhibitory Impact on Reproductive Function by Sébert, M.-E., Legros, C., Weltzien, F.-A., Malpaux, B., Chemineau, P., Dufour, S.

“…In the eel, a deficit in gonadotrophin‐releasing hormone (GnRH) and a strong dopaminergic (DA) inhibition are responsible for the blockade of gonad development…”
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Origin of cerebrospinal fluid melatonin and possible function in the integration of photoperiod by Tricoire, H, Møller, M, Chemineau, P, Malpaux, B

“…Melatonin, which is synthesized at night by the pineal gland, is present in the cerebrospinal fluid (CSF), but its entry site and its role in this compartment…”
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Relationship between polysialylated neural cell adhesion molecule and β-endorphin- or gonadotropin releasing hormone-containing neurons during activation of the gonadotrope axis in short daylength in the ewe by Chalivoix, S, Malpaux, B, Dufourny, L

“…Abstract Morphological plasticity has been demonstrated between breeding and anestrous seasons in the ewe hypothalamus, particularly for the…”
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Functional characterization of polymorphic variants for ovine MT1 melatonin receptors: Possible implication for seasonal reproduction in sheep by Trecherel, E., Batailler, M., Chesneau, D., Delagrange, P., Malpaux, B., Chemineau, P., Migaud, M.

“…In seasonal breeding species, the gene encoding for the melatonin MT 1 receptor (oMT 1) is highly polymorphic and numerous data have reported the existence of…”
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Four hours of daily contact with sexually active males is sufficient to induce fertile ovulation in anestrous goats by Bedos, M., Flores, J.A., Fitz-Rodríguez, G., Keller, M., Malpaux, B., Poindron, P., Delgadillo, J.A.

“…The study was conducted on two consecutive years to determine whether ovulatory activity can be induced in anovulatory goats by exposing them to sexually…”
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Stimulation of estrous behavior in grazing female goats by continuous or discontinuous exposure to males by Rivas-Muñoz, R, Fitz-Rodríguez, G, Poindron, P, Malpaux, B, Delgadillo, J.A

“…Two experiments were conducted during the anestrous period to determine: (1) whether males rendered sexually active by exposure to artificial long days…”
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Nutritional supplementation improves ovulation and pregnancy rates in female goats managed under natural grazing conditions and exposed to the male effect by Fitz-Rodríguez, G., De Santiago-Miramontes, M.A., Scaramuzzi, R.J., Malpaux, B., Delgadillo, J.A.

“…Two experiments were conducted to determine if nutritional supplementation improved ovulation and pregnancy rates in female goats managed under grazing…”
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Body condition is associated with a shorter breeding season and reduced ovulation rate in subtropical goats by De Santiago-Miramontes, M.A., Malpaux, B., Delgadillo, J.A.

“…To determine the effect of body condition on the characteristics of the breeding season in female goats from subtropical Mexico, does in either greater- or…”
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The response of luteinizing hormone secretion to photoperiod is modified by the level of nutrition in female Mediterranean goats by Zarazaga, L.A., Celi, I., Guzmán, J.L., Malpaux, B.

“…This paper reports the influence of nutrition on the photoperiodic control of luteinizing hormone (LH) secretion in female Mediterranean goats (i.e., goats…”
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