Papers by David Corcuera Domínguez
Aquaculture Nutrition
The nutritional profile of aquaculture feeds can be altered with substitution of fish-based ingre... more The nutritional profile of aquaculture feeds can be altered with substitution of fish-based ingredients, including the vitamin contents, ultimately affecting the vitamin supply to fish. Requirements for several vitamins have been described for early life stages of species including some as salmonids and carps, but optimum levels for gilthead seabream fingerlings have not been described for most vitamins. In order to evaluate the essentiality of vitamin K in gilthead seabream fingerlings, a basal diet with low levels of marine ingredients (FM 10% and FO 6%) designed to contain five supplementation levels of vitamin K3 (0.1, 2.8, 6.3, 12.0, and 23.0 mg kg-1) was tested for 70 days. Growth and productive parameters were monitored along the trial and samples for X-ray analyses, and bone and liver molecular markers, histology, and proximal composition were taken. At the end of the experiment, growth, grp expression, and the reduced prevalence of skeletal disorders suggested that dietary ...
Aquaculture, 2021
Modern aquaculture feeds tend to contain lower levels of fish based ingredients, while increasing... more Modern aquaculture feeds tend to contain lower levels of fish based ingredients, while increasing the content of plant ingredients. However, this may alter the vitamin profile of the feeds, leading to unbalanced vitamin supply. Requirements for several vitamins have been established for species such as carps and salmonids, but adequate levels for gilthead sea bream are yet unknown. Vitamin D is mainly involved in Ca homeostasis by regulating Ca uptake and liberation from bone intervening in bone remodeling. Fish are unable to synthesize vitamin D and so require absorbing it directly from the diet, thus, it is considered essential for fish. A practical plant-based diet containing 10% fish meal and 6% fish oil containing five levels of vitamin D 3 (0.15, 0.43, 0.50, 0.55 and 0.65 mg kg − 1 or 5.8, 17.0, 20.0, 22.0 and 26.0 IU g − 1) were formulated to identify the optimum levels for gilthead seabream juveniles. Feeding juveniles of gilthead seabream with a range of vitamin D 3 levels between 5.8 and 26.0 IU g − 1 for 70 days did not markedly alter growth. Increase dietary vitamin D 3 significantly raised the liver contents in vitamin D 3 in a dose-dependent manner following a potential regression. Increased dietary vitamin D 3 levels up to 11.6 IU g − 1 may reduce the incidence of skeletal anomalies, particularly caudal and maxillary anomalies, whereas further elevation of dietary vitamin D 3 levels increased the concentration of vitamin D 3 in liver as well as skeletal anomalies in association to the up-regulation of alp and bmp2 gene expression. The occurrence of myocarditis signs in fish fed vitamin D 3 levels of 20.0 IU g − 1 or more denote the toxic effects of these dietary levels. These results, together with the increased occurrence of skeletal anomalies in seabream fed the highest dietary vitamin D 3 levels, suggest initial signs of hypervitaminosis D. Thus, the recommended level for vitamin D 3 for gilthead seabream juveniles fed diets containing high levels of plant ingredients was suggested to be 11.6 IU g − 1 .
Fish meal is being increasingly substituted in diets for gilthead sea bream and Sea bream with in... more Fish meal is being increasingly substituted in diets for gilthead sea bream and Sea bream with ingredients of terrestrial origin. The replacement of Fish Meal (FM) and Fish Oil (FO), as main protein and lipid sources by alternative ingredients, may alter the micronutrient contents in the diets, leading to deficiencies or excess in several micronutrients related to fish growth, feed efficiency and health (Fountoulaki et al., 2016; Dominguez et al., 2019a, 2019b). Nowadays, aquafeeds for Mediterranean species are mostly based on nutritional requirements determined for other species (NRC, 2011) and in many most micronutrients, the requirements have not been yet determined for fish species. Hence, those feeds may be deficient or overdosed in some nutrients and, consequently, negatively affect KPIs (Dominguez et al., 2016). PerformFISH WP4 aimed to define the recommended levels for minerals and vitamins in gilthead sea bass and Sea bream diets to produce Species-‐Specific Nutrient Balan...
Resumen: En este número especial de la revista Intersticios se ha querido introducir algunos de l... more Resumen: En este número especial de la revista Intersticios se ha querido introducir algunos de los análisis sobre lo político que se han desarrollado desde la perspectiva de Pierre Bourdieu, aún no traducidos en el ámbito castellanoparlante. A partir de ahí, junto con un análisis reflexivo-crítico de los elementos menos "consistentes", en términos explicativos, de las aproximaciones que son predominantes en el estudio de los movimientos sociales y la acción colectiva, se pretende plantear la necesidad de incluir en las investigación ciertas dimensiones devaluadas o dejadas de lado (formas de do-minación, elementos estructurales y herramientas reflexivas, en el sentido bourdiano). Palabras clave: Espacio social, campo político, reflexividad, sociología política, Pierre Bourdieu. Abstract: In this special issue of the journal Intersticios, it is wanted to introduce some of the analysis of politics that have developed from the perspective of Pierre Bourdieu-and which have no...
Animals, 2021
The supplementation of fish diets with OH-SeMet reduces oxidative stress and modulates immune res... more The supplementation of fish diets with OH-SeMet reduces oxidative stress and modulates immune response against bacterial infection. However, despite the importance of essential polyunsaturated fatty acids in fish nutrition and their high risk of oxidation, the potential protective effect of OH-SeMet on these essential fatty acids has not been studied in detail. Moreover, while viral infection is very relevant in seabream production, no studies have focused the Se effects against viral infection. The aim of the present study was to assess the impact of dietary supplementation with OH-SeMet on gilthead seabream fatty acid profiles, growth performance and response against viral infection. Gilthead seabream juveniles (21.73 ± 0.27 g) were fed for 91 days with three experimental diets, a control diet without supplementation of Se (0.29 mg Se kg diet−1) and two diets supplemented with OH-SeMet (0.52 and 0.79 mg Se kg diet−1). A crowding stress test was performed at week 7 and an anti-vira...
Effects of graded levels of minerals in a multi‐nutrient package on Gilthead sea bream ( Sparus aurata ) fed a plant‐based diet
Aquaculture Nutrition, 2020
Fishes, 2019
Terrestrial protein and lipid sources are commonly used as substitutes for marine fishery-derived... more Terrestrial protein and lipid sources are commonly used as substitutes for marine fishery-derived raw ingredients in fish diets. However, their use is related with several side-effects on marine fish performance, health, or disease resistance. Physical barriers of the skin, gills, and gut constitute the primary defense mechanism of fish. Skin mucus mucosal mucins, water, proteins, ions, and lipids determine the physical, chemical, and protective characteristics of skin mucus. Very little is known about the influence of diet composition on fish skin mucus fatty acid profile. Gilthead sea bream skin mucus contained 10% of total lipids (TL), which consisted of 50–60% neutral (NL) and 40–50% polar lipids (PL) fractions. Σn−3 long chain polyunsaturated fatty acids (LC-PUFA) deposition was preferential in the NL fraction, whereas Σn−6LC-PUFA accumulation was similar in both lipid classes. Docosahexaenoic acid (DHA; 22:6n−3) was the main LC-PUFA stored in skin mucus (14% TL) in relation to...
PeerJ, 2017
Substituting fishmeal (FM) with vegetable meal (VM) can markedly affect the mineral composition o... more Substituting fishmeal (FM) with vegetable meal (VM) can markedly affect the mineral composition of feeds, and may require additional mineral supplementation. Their bioavailability and optimal supplementation levels depend also on the form of delivery of minerals. The aim of the study was to determine the effect of different delivery forms of three major trace elements (Zn, Mn and Se) in a marine teleost. Gilthead sea bream juveniles of 22.5 g were fed a VM-based diet for 12 weeks that was either not supplemented with these minerals or supplemented with inorganic, organic, or encapsulated inorganic forms of minerals in triplicate and compared to a FM-based diet. Our results showed that mineral delivery form significantly affected the biochemical composition and morphology of posterior vertebrae. Supplementation of VM-based diets with inorganic forms of the target minerals significantly promoted growth, increased the vertebral weight and content of ash and Zn, enhanced bone mineraliza...
Water, 2017
Aquaponics is the combination of aquaculture (fish) and hydroponic cultivation of plants. This re... more Aquaponics is the combination of aquaculture (fish) and hydroponic cultivation of plants. This review examines fish welfare in relation to rearing water quality, fish feed and fish waste and faeces to develop a sustainable aquaponic system where the co-cultured organisms, fish, bacteria in biofilters and plants, should be considered holistically in all aquaponics operations. Water quality parameters are the primary environmental consideration for optimizing aquaponic production and for directly impacting fish welfare/health issues and plant needs. In aquaponic systems, the uptake of nutrients should be maximised for the healthy production of the plant biomass but without neglecting the best welfare conditions for the fish in terms of water quality. Measures to reduce the risks of the introduction or spread of diseases or infection and to increase biosecurity in aquaponics are also important. In addition, the possible impacts of allelochemicals, i.e., chemicals released by the plants, should be taken into account. Moreover, the effect of diet digestibility, faeces particle size and settling ratio on water quality should be carefully considered. As available information is very limited, research should be undertaken to better elucidate the relationship between appropriate levels of minerals needed by plants, and fish metabolism, health and welfare. It remains to be investigated whether and to what extent the concentrations of suspended solids that can be found in aquaponic systems can compromise the health of fish. Water quality, which directly affects fish health and well-being, is the key factor to be considered in all aquaponic systems.
Operations Research Perspectives, 2015
Currently, multi-attribute auctions are becoming widespread awarding mechanisms for contracts in ... more Currently, multi-attribute auctions are becoming widespread awarding mechanisms for contracts in construction, and in these auctions, criteria other than price are taken into account for ranking bidder proposals. Therefore, being the lowest-price bidder is no longer a guarantee of being awarded, thus increasing the importance of measuring any bidder's performance when not only the first position (lowest price) matters. Modeling position performance allows a tender manager to calculate the probability curves related to the more likely positions to be occupied by any bidder who enters a competitive auction irrespective of the actual number of future participating bidders. This paper details a practical methodology based on simple statistical calculations for modeling the performance of a single bidder or a group of bidders, constituting a useful resource for analyzing one's own success while benchmarking potential bidding competitors.
Apunts. Medicina de l'Esport, 2016
Escafoides tarsiano; Osteonecrosis; Müller-Weiss; Fútbol Resumen Aunque muchos autores la conside... more Escafoides tarsiano; Osteonecrosis; Müller-Weiss; Fútbol Resumen Aunque muchos autores la consideran una osteonecrosis, la enfermedad de Müller-Weiss es una displasia del escafoides tarsiano producida en la infancia, pero que se mantiene asintomática hasta la edad adulta. La fisiopatología es debida a un retraso en la osificación, asociado a una compresión de la porción lateral del escafoides tarsiano por el astrágalo lateralizado y en varo. El compromiso suele ser bilateral y simétrico.
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Papers by David Corcuera Domínguez