33 documents found, page 1 of 4
Apparent digestibility coefficients of processed agro-food by-products in Europ...
Campos, I.; Matos, E.; Aragão, C.; Pintado, M.; Valente, L. M. P.Apparent digestibility coefficients (ADCs) of processed agro-food by-products were assessed in European seabass Dicentrarchus labrax). Each experimental diet was obtained by replacing 300 g/kg of a commercial-based diet used as reference (REF) with a test ingredient: wheat germ (GERM), okara meal (OKA), poultry by-product meal (POULT), steam hydrolysed (FeHY) and enzyme-treated feather meal (FeENZ), beta-lactog...
New developments and biological insights into the farming of Solea senegalensis...
Morais, Sofia; Aragão, C.; Cabrita, Elsa; Conceição, L. E. C.; Constenla, Maria; Costas, Benjamín; Dias, Jorge; Duncan, Neil; Engrola, S.Senegalese sole was one of the earliest identified candidate species with high potential for aquaculture diversification in the south of Europe. Its culture has been possible, and commercially attempted, for several decades, but intensive production has been slow to take off. This has been explained mostly by serious disease problems, high mortality at weaning, variable growth and poor juvenile quality. However...
Is dietary taurine supplementation beneficial for gilthead seabream (Sparus aur...
Pinto, W.; Figueira, L.; Santos, A.; Barr, Y.; Helland, S.; Dinis, Maria Teresa; Aragão, C.This study evaluated the effect of dietary taurine supplementation on the growth performance and methionine metabolism of gilthead seabream larvae. For this purpose, a growth experiment was carried out in which seabream larvae were fed upon rotifers supplemented with “blank” or taurine-enriched liposomes. A complementary trial was also done in which seabream larvae fed with live prey were subsequently tube-fed ...
Interactive effects of a high-quality protein diet and high stocking density on...
Costas, B.; Aragão, C.; Dias, J.; Afonso, A.; Conceição, L. E. C.Amino acids (AA) regulate key metabolic pathways, including some immune responses. Therefore, this study aimed to assess whether an increased availability of dietary AA can mitigate the expected increase in plasma cortisol and metabolites levels due to high stocking density and its subsequent immunosuppression. Senegalese sole (Solea senegalensis) were maintained at low stocking density (LSD; 3.5 kg m−2) or hig...
Effect of variable levels of dietary cholesterol and plant sterols on the growt...
Dias, J.; Colen, Rita; Rodrigues, V.; Aragão, C.; Engrola, S.; Viegas, Michael; Laizé, Vincent; Gavaia, Paulo J.; Cancela, LeonorCholesterol is found in all animal tissues and is an important component of biological cell membranes with functions such as precursor to bile acids, hormones and vitamins. Fish meal and fish oil are cholesterol-rich ingredients. Replacement of these marine-derived ingredients by plant proteins and vegetable oils tends to reduce dietary cholesterol levels.
Different environmental temperatures affect amino acid metabolism in the euryth...
Costas, B.; Aragão, C.; Ruiz-Jarabo, I.; Vargas-Chacoff, L.; Arjona, F. J.; Mancera, J. M.; Dinis, Maria Teresa; Conceição, L. E. C.Senegalese sole (Solea senegalensis) is a eurytherm teleost that under natural conditions can be exposed to annual water temperature fluctuations between 12 and 26C. This study assessed the effects of temperature on sole metabolic status, in particular in what concerns plasma free amino acid changes during thermal acclimation.
Dietary nitrogen and fish welfare
Conceição, L. E. C.; Aragão, C.; Dias, J.; Costas, B.; Terova, G.; Martins, C.; Tort, L.Little research has been done in optimizing the nitrogenous fraction of the fish diets in order to minimize welfare problems. The purpose of this review is to give an overview on how amino acid (AA) metabolism may be affected when fish are under stress and the possible effects on fish welfare when sub-optimal dietary nitrogen formulations are used to feed fish. In addition, it intends to evaluate the current po...
Effects of dietary amino acids and repeated handling on stress response and bra...
Costas, B.; Aragão, C.; Soengas, J. L.; Míguez, J. M.; Rema, P.; Dias, J.; Afonso, A.; Conceição, L. E. C.The present study aimed to assess the effects of increased availability of dietary amino acids (AA) on brain monoamine neurotransmitters and the metabolic processes resulting from stressful situations in fish. Senegalese sole (Solea senegalensis) juveniles (24.2 ± 0.4 g wet mass) were weekly subjected to an acute handling stressor (HDLG) or remained undisturbed (CTL). Additionally, both treatments were fed a co...
Cloning, tissue and ontogenetic expression of the taurine transporter in the fl...
Pinto, W.; Rønnestad, I.; Jordal, A. E. O.; Dinis, Maria Teresa; Aragão, C.Flatfish species seem to require dietary taurine for normal growth and development. Although dietary taurine supplementation has been recommended for flatfish, little is known about the mechanisms of taurine absorption in the digestive tract of flatfish throughout ontogeny. This study described the cloning and ontogenetic expression of the taurine transporter (TauT) in the flatfish Senegalese sole (Solea senega...
The use of different anaesthetics as welfare promoters during short-term human ...
Gonçalves, Rui A.; Aragão, C.; Frias, P. A.; Sykes, António V.Anaesthetics are frequently used to prevent injuries, stress and to promote welfare while handling animals. The efficiency of five anaesthetics for short-term handling of the European cuttlefish (Sepia officinalis) was tested in order to determine the best agent and its concentration. Ethanol (10.0, 20.0 and 30.0 mL.L−1 ), clove oil (0.05, 0.15 mL.L−1 ), hypothermia (8 °C), magnesium chloride (hexahydrated; 20.0, 2...