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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
Zarazaga Garcés, Luis Ángel; Malpaux, Benoît; Chemineau, Phileppe (Institut National de la Recherche Agronomique (INRA), 2003)We investigated if absolute (nocturnal) or relative (nocturnal/diurnal ratio) plasma melatonin concentrations were associated with the seasonal ovulatory activity in Ile-de-France ewes. Ninety-six and 121 ewes in two ... -
Artificial long days in addition to exogenous melatonin and daily contact with bucks stimulate the ovarian and oestrous activity in Mediterranean goat females
Zarazaga Garcés, Luis Ángel; Gatica Jorquera, María Carolina; Celi Mariátegui, Irma del Rosario; Guzmán Guerrero, José Luis; Malpaux, B. (Cambridge University Press, 2011)One experiment was conducted to determine whether the treatment with artificial long days and exogenous melatonin can induce reproductive activity during spring (seasonal anoestrus) in Mediterranean goats that are in daily ... -
Body condition score is a critical factor determining the onset of puberty in Blanca Andaluza female goat kids
Gallego Calvo, María Lourdes; Gatica Jorquera, María Carolina; Celi Mariátegui, Irma del Rosario; Guzmán Guerrero, José Luis; Zarazaga Garcés, Luis Ángel (CSIRO Publishing, 2015)This study examines the effect of body condition score (BCS), independently of bodyweight (BW), on the onset of puberty in Blanca Andaluza female kids born in Autumn (November). Thirty-six female kids were distributed into ... -
Calidad sensorial de la carne de cabritos lechales criados en sistemas de producción basados en pastoreo
Vega Galán, Francisco de la; Guzmán Guerrero, José Luis; Delgado Pertiñez, Manuel; Zarazaga Garcés, Luis Ángel; Ruiz Pérez-Cacho, Pilar; Galán-Soldevilla, Hortensia (Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Gobierno de México, 2021)En España, hay un interés creciente por la conservación de las razas caprinas autóctonas con formas de producción basadas en el pastoreo y por la posibilidad de transformación en producciones ecológicas. El objetivo ha ... -
Caracterización reproductiva de la raza caprina blanca andaluza : papel de la condición corporal, peso vivo y fotoperiodo
Gallego Calvo, María Lourdes (Universidad de Huelva, 2016)La raza caprina Blanca Andaluza es una raza autóctona calificada como en peligro de extinción y cuenta con un reducido número de criadores, así como con una carencia casi total de datos reproductivos. Por eso, el objetivo ... -
Carcase and meat quality of Blanca Andaluza kids fed exclusively with milk from their dams under organic and conventional grazing-based management systems
Guzmán Guerrero, José Luis; Vega, Francisco de la; Zarazaga Garcés, Luis Ángel; Argüello, Anastasio; Delgado Pertiñez, Manuel (PAGEpress, 2019-07)The number of organic farms is growing, but switching from conventional to organic production requires farms continue to produce high quality products. This study compares the carcase and meat quality of Blanca Andaluza ... -
Carcass Characteristics and Meat Quality of Conventionally and Organically Reared Suckling Dairy Goat Kids of the Payoya Breed
Guzmán Guerrero, José Luis; Vega, Francisco de la; Zarazaga Garcés, Luis Ángel; Argüello, Anastasio; Delgado Pertiñez, Manuel (De Gruyter Open, 2019-10)The viability of conventional goat farms, such as the native Payoya dairy goat, could be improved by switching to organic production, but product quality needs to be ensured. The present work assesses the carcass and ... -
The characteristics of the melatonin secretory rhythm are not modified by the stage of pregnancy in ewes
Zarazaga Garcés, Luis Ángel; Malpaux, B.; Chemineau, Phileppe (Institut National de la Recherche Agronomique (INRA), 1996)An experiment was designed to study if, in the same animals, characteristics of the plasma melatonin rhythm vary during pregnancy in ewes. Thirteen Ile-de-France ewes were maintained in natural photoperiod and measurements ... -
Effect of Citrus By-product on Physicochemical Parameters, Sensory Analysis and Volatile Composition of Different Kinds of Cheese from Raw Goat Milk
Guzmán Guerrero, José Luis; Delgado Pertiñez, Manuel; Galán Soldevilla, Hortensia; Zarazaga Garcés, Luis Ángel (MDPI, 2020-10)The increased use of concentrates to reduce pasture as a feed source in productive systems like Payoya breed goat farms has made it necessary to decrease feeding costs. The inclusion of agro-industry by-products such as ... -
Effect of melatonin during the seasonal anoestrous on the reactivation of the sexual activity and semen production at the normal breeding season on mediterranean bucks
Zarazaga Garcés, Luis Ángel; Gatica Jorquera, María Carolina; Guzmán Guerrero, José Luis; Casas, J. P. (Universidad Autónoma de Yucatán, 2009)One experiment was conducted to determine if the onset of the reproductive activity and semen production could be modified by a previous treatment with exogenous melatonin, used to enhance reproductive activity during the ... -
Efficacy of long day photoperiod treatment with respect to age of bucks for stimulation of the “male effect” on does at Mediterranean latitudes
Zarazaga Garcés, Luis Ángel; Gatica Jorquera, María Carolina; Delgado Pertiñez, Manuel; Hernández, Horacio; Guzmán Guerrero, José Luis; Delgadillo, José Alberto (Elsevier, 2022-05-05)This study examines whether the photostimulation of sexual activity in young bucks improves the reproductive performance of the "male effect" in comparison to adult males. The experimental design was a 2x2 with to variables: ... -
En los cabritos machos de regiones subtropicales, la exposición a días largos artificiales estimula una mayor tasa crecimiento, un mejor desarrollo e incrementa la glucemia
Vargas Cruz, Alexis Adrián; Zarazaga Garcés, Luis Ángel; Hernández, Horacio (Universidad Autónoma de Yucatán, 2022)Antecedentes. Los pequeños rumiantes de regiones subtropicales son sensibles y responden fisiológicamente a los cambios en el fotoperiodo. En algunos sistemas de producción caprina del subtrópico, como los que existen en ... -
Estudio de los mecanismos implicados en la estacionalidad reproductiva de caprinos mediterráneos : papel de los opioideos, las catecolaminas y la serotonina
Celi Mariátegui, Irma del Rosario (Universidad de Huelva, 2012)El objetivo de la Tesis fue estudiar el papel del fotoperiodo, alimentación y melatonina (MEL) exógena en la regulación de la secreción de LH en cabras mediterráneas, analizando los posibles sistemas neuroendocrinos (SN) ... -
Exogenous melatonin does not improve the freezability of Blanca Andaluza goat semen over exposure to two months of short days
Gallego Calvo, María Lourdes; Gatica Jorquera, María Carolina; Santiago Moreno, Julian; Guzmán Guerrero, José Luis; Zarazaga Garcés, Luis Ángel (Elsevier Masson, 2015)This paper compares the effects of exposure to exogenous melatonin (MEL), short days (SD, 8 h of light) and long days (LD, 16 h of light), on reproductive activity, sperm motility and other reproductive variables, in Blanca ... -
Fatty acid composition of muscle and adipose tissues of organic and conventional Blanca Andaluza suckling kids
Vega, Francisco de la; Guzmán Guerrero, José Luis; Delgado Pertiñez, Manuel; Zarazaga Garcés, Luis Ángel; Argüello, Anastasio (Consejo Superior de Investigaciones Científicas, 2013)Interest in the preservation of autochthonous breeds such as the Blanca Andaluza goat (meat breed), raised under grazing-based management, has recently increased among Spanish farmers. A study of the possibilities of ... -
Fatty acid composition of muscle and internal fat depots of organic and conventional Payoya goat kids
Vega, Francisco de la; Guzmán Guerrero, José Luis; Delgado Pertiñez, Manuel; Zarazaga Garcés, Luis Ángel; Argüello, Anastasio (Consejo Superior de Investigaciones Científicas, 2013)Interest in the preservation of autochthonous breeds such as the Payoya goat (dairy breed), raised using extensive or semi-extensive grazing, has also recently increased among Spanish farmers. A study of the possibilities ... -
Feeding Dairy Goats Dehydrated Orange Pulp Improves Cheese Antioxidant Content
Guzmán Guerrero, José Luis; Zarazaga Garcés, Luis Ángel; Martín García, Antonio García; Delgado Pertiñez, Manuel (MDPI, 2024)Agroindustrial by-products constitute an alternative source of feed livestock, and their use contributes to the sustainability of livestock systems and the circular bioeconomy. The effects of replacing cereal (0%, 40%, and ... -
Influencia del plano de alimentacion sobre los parametros reproductivos en ovejas de reducido nivel ovulatorio
Forcada Miranda, F.; Abecia Martínez, J. A.; Zarazaga Garcés, Luis Ángel; Lozano Cantín, J. M. (Universidad de Córdoba, 1992)Se ha estudiado la influencia de un flushingde 6 semanas antes de la cubrición sobre los parámetros reproductivos en ovejas al inicio de la estación sexual. Para ello, 91 ovejas adultas Rasa Aragonesa fueron distribuidas ... -
The isolation of females from males to promote a later male effect is unnecessary if the bucks used are sexually active
Zarazaga Garcés, Luis Ángel; Gatica Jorquera, María Carolina; Hernández, H.; Gallego Calvo, María Lourdes; Delgadillo, J. A.; Guzmán Guerrero, José Luis (Elsevier, 2017)It has been suggested that female goats in permanent contact with males become refractory to their presence, and need to be previously separated from them for 40–45 days if the presence of bucks is to induce reproductive ... -
Melatonin concentrations in the two jugular veins, and relationship with the seasonal reproductive activity in goats
Zarazaga Garcés, Luis Ángel; Celi Mariátegui, Irma del Rosario; Guzmán Guerrero, José Luis; Malpaux, B. (Elsevier, 2010-07)The authors investigated whether melatonin concentrations vary between the two jugular veins and whether absolute (nocturnal) or relative (nocturnal/diurnal ratio) plasma melatonin concentrations are associated with seasonal ...