17 documents found, page 1 of 2
Development and application of a mechanistic nutrient-based model for precision...
Soares, Filipe M. R. C.; Nobre, Ana M. D.; Raposo, Andreia I. G.; Mendes, Rodrigo; Engrola, Sofia; Rema, Paulo J. A. P.; Conceição, Luís E. C.This manuscript describes and evaluates the FEEDNETICS model, a detailed mechanistic nutrient-based model that has been developed to be used as a data interpretation and decisionsupport tool by fish farmers, aquafeed producers, aquaculture consultants and researchers. The modelling framework comprises two main components: (i) fish model, that simulates at the individual level the fish growth, composition, and n...
STC1 and PTHrP modify carbohydrate and lipid metabolism in liver of a teleost fish
Palma, Pedro F. S.; Bock, Christian; Silva, Tomé S.; Guerreiro, Pedro; Power, Deborah; Pörtner, Hans-Otto; Canario, AdelinoStanniocalcin 1 (STC1) and parathyroid hormone-related protein (PTHrP) are calciotropic hormones in vertebrates. Here, a recently hypothesized metabolic role for these hormones is tested on European sea bass treated with: (i) teleost PTHrP(1-34), (ii) PTHrP(1-34) and anti-STC1 serum (pro-PTHrP groups), (iii) a PTHrP antagonist PTHrP(7-34) or (iv) PTHrP(7-34) and STC1 (pro-STC1 groups). Livers were analysed usin...
Enhanced dietary formulation to mitigate winter thermal stress in gilthead sea ...
Schrama, Denise; Richard, Nadège; Silva, Tomé S.; Figueiredo, Filipe A.; Conceição, Luís E. C.; Burchmore, Richard; Eckersall, David; Rodrigues, PedroLow water temperatures during winter are common in farming of gilthead sea bream in the Mediterranean. This causes metabolic disorders that in extreme cases can lead to a syndrome called "winter disease." An improved immunostimulatory nutritional status might mitigate the effects of this thermal metabolic stress. A trial was set up to assess the effects of two different diets on gilthead sea bream physiology an...
Metabolic fingerprinting of gilthead seabream (Sparus aurata) liver to track in...
Silva, Tomé S.; Costa, Ana M. Rosa da; Conceição, L. E. C.; Dias, Jorge P.; Rodrigues, Pedro; Richard, NadègeFarmed gilthead seabream is sometimes affected by a metabolic syndrome, known as the "winter disease", which has a significant economic impact in the Mediterranean region. It is caused, among other factors, by the thermal variations that occur during colder months and there are signs that an improved nutritional status can mitigate the effects of this thermal stress. For this reason, a trial was undertaken wher...
Influence of supplemental maslinic acid (olive-derived triterpene) on the post-...
Matos, Elisabete; Silva, Tomé S.; Wulff, Tune; Valente, L. M. P.; Sousa, Vera; Sampaio, Eduardo; Gonçalves, Amparo; Silva, Joana M. G.Maslinic acid, a natural triterpene, was evaluated as a dietary supplement to modulate glycogen post-mortem mobilization in gilthead seabream muscle. For this purpose, a multidisciplinary trial was undertaken, where flesh quality criteria, as well as biochemical and histological parameters, enzymatic activities and protein expression in the muscle were assessed. Supplementing gilthead seabream diets with maslin...
Proteomics in aquaculture: applications and trends
Rodrigues, Pedro; Silva, Tomé S.; Dias, J.; Jessen, FlemmingOver the last forty years global aquaculture presented a growth rate of 6.9% per annum with an amazing production of 52.5 million tonnes in 2008, and a contribution of 43% of aquatic animal food for human consumption. In order to meet the world's health requirements of fish protein, a continuous growth in production is still expected for decades to come. Aquaculture is, though, a very competitivemarket, and a g...
Two-dimensional proteomics as a tool to evaluate nutritional effects in farmed ...
Richard, Nadège; Gavaia, Paulo J.; De Vareilles, M.; Silva, Tomé S.; Cordeiro, O.; Rodrigues, Pedro; Conceição, L. E. C.The use of proteomics in fish research is at a relatively early stage compared to terrestrial vertebrates. It has already been applied in the field of fish nutrition, enabling to point out metabolic changes occurring in response to dietary manipulations such as a variation in energy content, dietary nitrogen compostion, lipid composition or the incorporation of plant protein sources in aquafeeds.
Impact of dietary protein hydrolysates on skeleton quality and proteome in Dipl...
Vareilles, Mahaut; Richard, Nadège; Gavaia, Paulo J.; Silva, Tomé S.; Cordeiro, O.; Guerreiro, Inês; Yúfera, M.; Batista, I.; Pires, C.In order to investigate the effects of dietary protein hydrolysates (PH) on larval growth performance, skeleton quality and proteome expression, triplicate groups of white seabream (Diplodus sargus) larvae were co-fed from first-feeding with live feed and three microencapsulated diets differing in the molecular weight of their PH fraction (Control – inclusion of CPSP-90; H – inclusion of a high amount in 0.5–30...
Dietary tools to modulate glycogen storage in gilthead seabream muscle: glycero...
Silva, Tomé S.; Matos, Elisabete; Cordeiro, O.; Colen, Rita; Wulff, Tune; Sampaio, Eduardo; Sousa, Vera; Valente, L. M. P.; Gonçalves, AmparoThe quality and shelf life of fish meat products depend on the skeletal muscle’s energetic state at slaughter, as meat decomposition processes can be exacerbated by energy depletion. In this study, we tested dietary glycerol as a way of replenishing muscle glycogen reserves of farmed gilthead seabream. Two diets were tested in duplicate (n = 42/tank). Results show 5% inclusion of crude glycerol in gilthead seab...
Proteomics as a tool to develop molecular indicators of nutritional condition i...
Rodrigues, Pedro; Richard, Nadège; De Vareilles, M.; Silva, Tomé S.; Conceição, L. E. C.Gilthead seabream is the main aquaculture species produced in Portugal, as well as in the Mediterranean. However, the winter disease syndrome, a series of metabolic and immune system disorders caused by low temperatures, affects seabream culture, leading to important industrial losses, either as mortalities or growth decreases during spring. These effects can be minimized through dietary optimisation, either im...