Thesis Collection
Last Deposit
Browsing by Author "Zarazaga Garcés, Luis Ángel"
Now showing items 1-20 of 22
-
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 ... -
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; De la Vega, Francisco; Zarazaga Garcés, Luis Ángel; Argüello, Anastasio; Delgado Pertíñez, 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 Pertíñez, 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 Pertíñez, 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 ... -
Estudio de los mecanismos implicados en la estacionalidad reproductiva de caprinos mediterráneos : papel de los opioideos, las catecolaminas y la serotonina
(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 ... -
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 ... -
Nutrition level and season of birth do not modify puberty of Payoya goat kids
Zarazaga Garcés, Luis Ángel; Guzmán Guerrero, José Luis; Domínguez, C.; Pérez, C. M.; Prieto, R.; Sánchez, J. (Cambridge University Press, 2009)
This study analysed the effect of level of nutrition and date of birth (age) on the onset of puberty in Payoya she-kids born in autumn (November) or in winter (February). Two experiments were conducted to examine pubertal ... -
The reproductive performance of female goats treated with melatonin is not improved after introduction to bucks displaying springtime sexual activity if these does are experiencing decreasing body weight/condition score
Zarazaga Garcés, Luis Ángel; Gatica Jorquera, María Carolina; Gallego Calvo, María Lourdes; Guzmán Guerrero, José Luis (Elsevier Masson, 2017)
The aim of the present work was to determine whether treatment with melatonin modifies the reproductive response of female goats experiencing increasing or decreasing body weight (BW)/body condition score (BCS) when ... -
Role of body condition score and body weight in the control of seasonal reproduction in Blanca Andaluza goats
Gallego Calvo, María Lourdes; Gatica Jorquera, María Carolina; Guzmán Guerrero, José Luis; Zarazaga Garcés, Luis Ángel (Elsevier Masson, 2014)
The reproductive activity of 84 female Blanca Andaluza goats was monitored over 17 months to determine the role of body condition score (BCS) and body weight (BW) in its control. Following a 3 × 2 factorial experimental ... -
Seasonal changes in reproductive activity, sperm variables and sperm freezability in Blanca Andaluza bucks
Gallego Calvo, María Lourdes; Gatica Jorquera, María Carolina; Santiago Moreno, Julian; Guzmán Guerrero, José Luis; Zarazaga Garcés, Luis Ángel (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), 2015)
Interest in the preservation of endangered breeds such as the Blanca Andaluza goat, has increased and some steps should be therefore taken to ensure it. The study was designed to determine the seasonal reproductive pattern ... -
The Use of Concentrates Rich in Orange By-Products in Goat Feed and its Effects on Physico-Chemical, Textural, Fatty Acids, Volatile Compounds and Sensory Characteristics of the Meat of Suckling Kids
Guzmán Guerrero, José Luis; Delgado Pertíñez, Manuel; Beriáin, María José; Pino, Rafael; Zarazaga Garcés, Luis Ángel; Horcada, Alberto (MDPI, 2020-04-28)
We analysed how replacing cereal concentrates with dehydrated orange pulp (DOP) in the diet of mother goats affects the meat quality of suckling kids. Three experimental diets for mother goats were designed. The DOP-0 diet ... -
Using dried orange pulp in the diet of dairy goats: effects on milk yield and composition and blood parameters of dams and growth performance and carcass quality of kids
Guzmán Guerrero, José Luis; Pérez Ecija, A.; Zarazaga Garcés, Luis Ángel; Delgado Pertíñez, Manuel (Cambridge University Press, 2020-10)
Although dried orange pulp (DOP) may conveniently replace cereals in ruminant diets, few studies have considered similar diet substitution for goats. We hypothesised that DOP could replace cereal-based concentrate in goat ... -
Utilización de fotoperiodo artificial, melatonina exógena y/o efecto macho para la mejora de los parámetros reproductivos de caprinos mediterráneos
(Universidad de Huelva, 2012)El objetivo de este trabajo ha sido evaluar la utilización del fotoperiodo artificial, la aplicación de melatonina y el efecto macho para inducir actividad reproductiva durante el periodo de anestro estacionario en ...
