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Publications (29)
1. The present study assessed the effect of different antioxidants on the quality of chilled/frozen-thawed sperm of red-legged partridge.2. Sperm samples from 40 red-legged partridges were collected and extended 1:1 (v:v) with Lake and Ravie 84, supplemented with ascorbic acid or butylated hydroxytoluene (BHT) at 0, 0.2, 0.4, 0.8 mM and catalase (C...
WM Rauw, M García-Gil, O Torres, J Santiago-Moreno, A Toledano-Diaz, L Gomez-Raya, 2024. Egg production of local Spanish breeds of laying hens and their physiological stress response to heat stress. European Federation of Animal Science (EAAP), Florence, Italy, Session 58, Book of Abstracts page 687.
L Gomez-Raya, WM Rauw, O Torres, MG Gil, R Peíro, 2024. Next-Generation sequencing errors lessens the estimation of recent inbreeding. European Federation of Animal Science (EAAP), Florence, Italy, Session 31, Book of Abstracts page 429.
Climate change can have a negative impact on agricultural production and food security. Vice versa, agricultural practices themselves contribute to climate change because of land, water, and energy use and anthropogenic emissions of greenhouse gasses and waste. The European Green Deal focusses on “transition to a sustainable food system that has a...
Environmental challenges may adversely affect poultry production. Autochthonous breeds are particularly valuable in a climate change context because of adaptation to the local environment. The objective of the present study was to determine the impact of cold stress, water restriction, and heat stress on the stress response quantified by the hetero...
Circular economic principals of production are based on material flows through the system with minimum external inputs, recycling of resources, generating minimum waste, emissions, or pollution. Agriculture presents a major opportunity for the utilization of wastes, by‐products and co‐products in the development of a circular economy via the design...
Rauw, W.M., Gil, M.G., Torres, O., Gomez-Raya, L., 2022. Genotyping errors in SNP markers: types, consequences, and a novel detection method. World Congress on Genetics Applied to Livestock Production, Rotterdam, The Netherlands, 3-8 July 2022.
Chicken semen cryopreservation is a tool for programs of genetic diversity management and endangered breeds conservation. Due to physiological features, the fertility rates of cryopreserved poultry sperm are lower than mammal species. Thus, improvement of the semen cryopreservation methods is required. A first study was performed by a 2 × 2 factori...
INTRODUCCIÓN Uno de los factores que determinará el éxito de la inseminación artificial, como herramienta para difundir comportamientos que favorezcan la actividad cinegética y la conservación de la perdiz roja, es la preservación del semen por refrigeración o congelación. Durante los procesos de almacenamiento espermático se produce un incremento...
INTRODUCCIÓN El objetivo del presente trabajo fue evaluar cómo influye el tipo de alojamiento de los gallos (en gallineros con parques exteriores con tierra sin hierba, o con acceso a parques con la típica vegetación mediterránea) en la calidad del esperma, y la respuesta a la criopreservación. Además se estudió la posible correlación entre calidad...
Uno de los factores de gran importancia en el alojamiento de gallinas es la presencia del sexo opuesto. En la naturaleza la unidad social básica del antecesor de la gallina doméstica (Gallus gallus) consiste típicamente en un macho rodeado de varias hembras (3 a 5 hembras) (Collias y Collias, 1967). En programas de conservación in vivo la presencia...
INTRODUCCION El uso de sistemas de alojamiento con acceso a pastos en la producción avícola esta creciendo debido a la demanda de los consumidores de productos más "naturales" (carne y huevos) y procedentes de sistemas respetuosos con el bienestar animal (Sossidou et al., 2011). Elegir correctamente el mejor genotipo para este tipo de sistemas al a...
The purpose of this study was to examine the anti-predator behavior in pure red-legged partridges (Alectoris rufa) and hybrids with chukar partridges (A. rufa × (A. rufa × A. chukar)). A total of 117 birds (66 pure and 51 hybrid partridges; 74 females and 43 males) maintained in outdoor cages were used at a range of 52 to 55 wk of age. Four active...
The purpose of this study was to examine the anti-predator behavior in pure red-legged partridges (Alectoris rufa) and hybrids with chukar partridges (A. rufa × (A. rufa × A. chukar)). A total of 117 birds (66 pure and 51 hybrid partridges; 74 females and 43 males) maintained in outdoor cages were used at a range of 52 to 55 wk of age. Four active...
Abstract
This paper reports the first successful artificial insemination (AI) of red-legged partridges (Alectoris rufa), the fertility rate achieved, and the length of time sperm cells can survive inside the oviduct (i.e., the post-AI fertile period). Semen from 20 mature males was collected by massage and pooled for use in single intravaginal ins...
INTRODUCCIÓN La cría de la perdiz roja en granjas ha tenido un fuerte desarrollo para dar respuesta a la gran demanda cinegética de esta especie. El aumento de la cría y suelta de perdices (de 3 a 4 millones de perdices/año; Sánchez et al., 2009) ha consolidado una producción cinegética cada vez más industrializada (González-Redondo et al., 2010)....
The purposes of this study were to examine the duration of induced tonic immobility (a reliable fear indicator considered a passive anti-predator behavioural trait) and two stress indicators (heterophil to lymphocyte ratio, and fluctuating asymmetry of leg length, middle-toe length, and wing length) in females and males of the red-legged partridge,...
The aim of this study was to analyze the effect of regrouping on heterophil to lymphocyte ratio (H:L), tonic immobility duration (TI), and fluctuating asymmetry (FA). In experiment 1, 192 chicks were reared in cages with or without regrouping. There was similar H:L, TI, and FA of leg length, wing length, and leg width in resident, intruder, and con...
The objective of this study was to compare the external, internal, and nutritional quality of eggs, and the welfare of non-beak-trimmed hens housed in three different non-cage systems: indoor litter floor pens (L), outdoor with pasture access (OP), and outdoor without pasture access (O). The external egg quality was analyzed for egg weight, shape i...
The purpose of this study was to analyze the effect of auditory enrichment (by means of classical music) or physical enrichment (by means of hanging colored string bunches and barley grains on the floor) on tonic immobility duration, heterophil to lymphocyte ratio, and fluctuating asymmetry (FA) in chicks of several layer breeds. In experiment 1, 1...
Bilateral asymmetry of several secondary sexual traits (wattle, ear-lobe, and wing-bay areas), heterophil to lymphocyte ratio, and tonic immobility duration were studied in cocks from two Spanish breeds (Black-red Andaluza and Red Villafranquina) and a tester line (ey). Directional asymmetry occurred together with fluctuating asymmetry or antisymme...
Duration of tonic immobility and heterophil to lymphocyte ratio (indices of fear and stress, respectively) were compared in hens having very poor or perfect plumage at 72 wk of age. Five Spanish breeds of chickens (Castellana, Andaluza, Vasca, Villafranquina, and Leonesa) were used. There were significant differences among groups in terms of tonic...
