Person: Fuente Vázquez, Jesús De La
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First Name
Jesús De La
Last Name
Fuente Vázquez
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Veterinaria
Department
Producción Animal
Area
Producción Animal
Identifiers
5 results
Search Results
Now showing 1 - 5 of 5
Item Effect of ice stunning versus electronarcosis on stress response and flesh quality of rainbow trout(Aquaculture, 2021) Bermejo Poza, Rubén; Fuente Vázquez, Jesús De La; González De Chávarri Echániz, Elisabeth; Díaz Díaz Chirón, María Teresa; Fernández-Muela Garrote, Montserrat; Pérez, Concepción; Torrent, Fernando; Villarroel, Morris; Fuente Vázquez, Jesús De LaIn recent years, concerns about fish welfare have increased in aquaculture, most pointedly regarding the slaughter process. Immersion in ice water (live chilling) is still commonly used as a stunning method in salmonids, but can have negative effects on the stress response and flesh quality. A valid alternative is electronarcosis, but the specific details of the intensity and frequency of the current applied depend on the species and size, and little is known about how that may affect fish welfare or product quality. In this study, adult rainbow trout (294 ± 8.44 g average weight) were subjected to three different stunning methods before slaughter: immersion in ice water and electronarcosis at two different current intensities (200 or 400 mA). Electronarcosis caused fish to lose consciousness faster than those live chilled. Plasma concentration of cortisol was lower in fish stunned with 400 mA (400 mA: 5.2 ± 0.67 vs. Ice: 9.1 ± 0.90; 200 mA: 9.3 ± 1.20 ng/ml). Creatine-phosphokinase enzyme levels were higher in ice stunned fish compared to electronarcosis (Ice: 168 ± 2.32 vs. 200 mA: 114 ± 0.89; 400 mA: 104 ± 0.62 U/l). Regarding flesh quality, initial muscle pH was lower in fish stunned by ice immersion than by electronarcosis (Ice: 6.49 ± 0.034 vs. 200 mA: 6.76 ± 0.050; 400 mA: 6.61 ± 0.04), presenting also an earlier onset of rigor mortis. Fish stunned with 400 mA electronarcosis also presented higher levels of muscle glycogen than those stunned with ice water (0.181 ± 0.029 vs. 0.101 ± 0.013 mg/g). In conclusion, electronarcosis is a stunning method that can produce an immediate loss of consciousness in rainbow trout, reducing stress response before slaughter and improving flesh quality (with higher benefits using a current intensity of 400 mA), in contrast to immersion in ice water.Item Valorisation of an extract from olive oil waste as a natural antioxidant for reducing meat waste resulting from oxidative processes(Journal of Cleaner Production, 2017) Díaz Díaz Chirón, María Teresa; Lauzurica Gómez, María Ascensión Sara; Muíño, Iria; Apeleo, Elizabeth; Pérez-Santaescolástica, Cristina; Rivas-Cañedo, Ana; Pérez, Concepción; Cañeque, Vicente; Fuente Vázquez, Jesús De La; María Teresa Diaz Diaz ChirónSpain is the biggest olive oil producer in the world what means that this area is especially affected by olive mill waste pollution. The main system used for extracting olive oil is the continuous two-phase centrifugation system, which generates olive wet cake waste. This wastage has disposal problems due to its phytotoxicity and high moisture content, so strategies for its use and revalorization are needed. One of these strategies is the extraction of bioactive compounds, as is the case of polyphenols present in the waste, which could be used as natural antioxidants in food. This study evaluated the effect of adding an olive waste extract (100, 200 or 400 mg gallic acid equivalents/kg muscle), as a possible natural polyphenol-rich antioxidant on the stability of lamb meat patties enriched with omega-3 fatty acids, and stored in high-oxygen modified atmosphere packs for up to 9 days at 4 °C. Addition of the extract delayed meat discolouration, lipid oxidation (p ≤ 0.001) and protein carbonylation (p ≤ 0.001), and increased loss of thiol groups (p ≤ 0.05) relative to controls. Fish odour (p ≤ 0.01) and flavour (p ≤ 0.05) were lower and odd odour and flavour (p ≤ 0.001) higher in patties with added the extract compared to controls, but the overall liking score was not affected. The addition of the extract resulted in acceptable lamb meat patties (in terms of oxidation) after 6 days of storage, while patties without extract did not. The results pointed out the potential for using olive waste extracts as natural antioxidants in meat products. With this strategy, the olive oil industry would encourage to follow an eco-friendlier olive oil production chain obtaining marketable products from the wastes generated. At the same time, the shelf-life (in terms of oxidation process) of the lamb patties would be increased reducing food wastes at the point-of-sale and at consumer level, which is especially important in a high perishable food such as minced meat products, and reducing the environmental impact that food waste causes along the food supply chain.Item Animal performance and meat characteristics in steers reared in intensive conditions fed with different vegetable oils(Animal, 2016) Castro Madrigal, Teresa; Cabezas Albéniz, Almudena; Fuente Vázquez, Jesús De La; Isabel Redondo, Beatriz; Manso Alonso, María Teresa; Jimeno Vinatea, Vicente; Teresa Castro MadrigalEnhancing the quality of beef meat is an important goal in terms of improving both the nutritional value for the consumer and the commercial value for producers. The aim of this work was to study the effects of different vegetable oil supplements on growth performance, carcass quality and meat quality in beef steers reared under intensive conditions. A total of 240 Blonde D’ Aquitaine steers (average BW=293.7±38.88 kg) were grouped into 24 batches (10 steers/batch) and were randomly assigned to one of the three dietary treatments (eight batches per treatment), each supplemented with either 4% hydrogenated palm oil (PALM) or fatty acids (FAs) from olive oil (OLI) or soybean oil (SOY). No differences in growth performance or carcass quality were observed. For the meat quality analysis, a steer was randomly selected from each batch and the 6th rib on the left half of the carcass was dissected. PALM meat had the highest percentage of 16:0 (P<0.05) and the lowest n-6/n-3 polyunsaturated fatty acids (PUFA) ratio (P<0.05), OLI had the highest content of t11-18:1 (P<0.01) and c9,t11-18:2 (P<0.05) and SOY showed the lowest value of monounsaturated fatty acids (MUFA) (P<0.001), the highest percentage of PUFA (P<0.01) and a lower index of atherogenicity (P=0.07) than PALM. No significant differences in the sensory characteristics of the meat were noted. However, the results of the principal component analysis of meat characteristics enabled meat from those steers that consumed fatty acids from olive oil to be differentiated from that of steers that consumed soybean oil.Item Environmental enrichment improves growthandfillet quality in rainbow trout(Journal of the Science of Food and Agriculture, 2024) De la Llave-Propín, Alvaro; Martínez Villalba, Andrea; Villarroel, Morris; Pérez Marcos, Concepción; González De Chávarri Echániz, Elisabeth; Díaz Díaz Chirón, María Teresa; Cabezas Albéniz, Almudena; González Garoz, Roberto; Fuente Vázquez, Jesús De La; Bermejo Poza, RubénBackground: Some environmental enrichment methods, such as occupational enrichment (OE), can improve fish growth, but little is known about its effects on fillet quality. In this study, we evaluated the effects of OE using underwater currents on different aspects of fillet quality and muscle metabolism in rainbow trout (Oncorhynchus mykiss), before and after a handling procedure (fasting). The trout were placed in groups of 30 in separate tanks in three treatments for 30 days: no artificial currents (CON), randomly fired underwater currents (RFC), and continuous underwater currents (CUC). Additionally, half of the individuals in each treatment were fasted (5 days, 45.2 °C days). Results: Slaughter weight, condition factor, and relative growth were lower in CON fish, indicating a positive effect of OE on growth. Rigor mortis, muscle pH, and muscle glycogen levels were similar among treatments, indicating no effect of OE on classical measures of fillet quality. However, significant differences were found regarding fillet colour and muscle enzymes. The fillets of RFC fish were more salmon-pink in colour, which is favoured by consumers. Also, activity levels of pyruvate kinase and glycogen phosphorylase in muscle were significantly higher in CUC fish, probably due to increased energy demands, as pumps were on continually in that treatment. Conclusion: Overall, RFC fish seemed to have received enough stimulation to improve growth while not being excessive in terms of exhausting the animals (avoiding negative effects on muscle metabolism), whereas OE may have provided a hormetic effect, allowing fish to better adjust to fasting. © 2023 Society of Chemical Industry.Item Efecto del enriquecimiento ambiental alimenticio en el comportamiento de ovejas alojadas en estabulación permanente(Información Técnica Económica Agraria, 2023) Gonçalves-Casaco, J. T. V.; Fuente Vázquez, Jesús De La; Pérez Marcos, Concepción; González De Chávarri Echániz, ElisabethLa creciente preocupación por el bienestar de los animales en sistemas de producción intensivos ha llevado al desarrollo de diferentes programas de enriquecimiento ambiental, para mejorar el grado de diversidad comportamental de los animales de granja y mejorar su bienestar. El objetivo de este trabajo fue determinar los efectos de un enriquecimiento ambiental alimenticio sobre la respuesta comportamental de ovejas gestantes, lactantes con corderos y secas. A partir del rebaño de la Facultad de Veterinaria de la Universidad Complutense de Madrid, 36 ovejas de la raza Castellana se distribuyeron aleatoriamente en 9 lotes de 4 ovejas, 3 grupos por estado fisiológico. El enriquecimiento nutricional consistió en proporcionar el 25 % de la ración de volumen, heno de alfalfa, en una malla suspendida del techo y una plataforma para facilitar el acceso, administrando también heno en el comedero habitual. Se grabaron las frecuencias y el tiempo que las ovejas dedicaron a la expresión de los distintos comportamientos. Las ovejas lactantes usaron de inmediato el enriquecimiento, mientras que las gestantes aprendieron, porque no fueron a comer a la malla el día 1, pero sí los días sucesivos. Al cuarto día la frecuencia y el tiempo que el conjunto de ovejas dedicó a comer en los diferentes sitios era mayor, así como las interacciones sociales en gestantes y secas, siendo menor el comportamiento de pie observando. Se ha conseguido que las ovejas se mantengan activas y distraídas, expresando durante más tiempo un repertorio de comportamientos naturales y, en consecuencia, mejorando su bienestar.