15 documents found, page 1 of 2
Health status in gilthead seabream (Sparus aurata) juveniles fed diets devoid o...
Reis, B.; Ramos-Pinto, L.; Martos-Sitcha, J. A.; Machado, M.; Azeredo, R.; Fernandez-Boo, S.; Engrola, S.; Unamunzaga, C.; Calduch-Giner, J.To enhance fish general health, feeds can be supplemented with health-promoting additives, reducing the need to use chemotherapeutics. Incorporation of marine algae biomasses in aquafeeds has been shown to improve fish immune status by enhancing innate immune response. This study evaluated the effects of Phaeodactylum tricornutum incorporation in feed by two different processes, either as freeze-dried biomass o...
Modulation of the immune condition in European seabass (Dicentrarchus labrax) j...
Machado, M.; Engrola, Sofia; Colen, R.; Conceicao, L. E. C.; Dias, J.; Costas, B.Methionine is the first limiting AA in fish diets, particularly in those containing high levels of plant protein sources (e.g. soybean). It is also important to highlight that methionine presents a key role in the immune system of many vertebrate animal models, including fish.
Physiopathological responses of sole (Solea senegalensis) subjected to bacteria...
Peixoto, M. J.; Domingues, A.; Batista, S.; Gonçalves, J. S. M.; Gomes, A. M.; Cunha, S.; Valente, L. M. P.; Costas, B.; Ozório, R. O. A.This study aimed to evaluate the protective effects of four autochthonous bacteria isolated from juvenile sole (Solea senegalensis) intestine as dietary probiotic supplement against bacterial pathogen infection and handling/transport stressors. Growth performance and immune responses were evaluated after 85 days of feeding trial. Sole (IBW = 16.07 ± 0.11 g) were fed six experimental diets, a control diet (CTRL,...
Physiopathological responses of sole (Solea senegalensis) subjected to bacteria...
Peixoto, M.J.; Domingues, A.; Batista, S.; Gonçalves, J.F.M.; Gomes, A.M.; Cunha, Sofia; Valente, L.M.P.; Costas, B.; Ozório, R.O.A.This study aimed to evaluate the protective effects of four autochthonous bacteria isolated from juvenile sole (Solea senegalensis) intestine as dietary probiotic supplement against bacterial pathogen infection and handling/transport stressors. Growth performance and immune responses were evaluated after 85 days of feeding trial. Sole (IBW = 16.07 ± 0.11 g) were fed six experimental diets, a control diet (CTRL,...
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...
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...
Changes in liver proteome expression of Senegalese sole (Solea senegalensis) in...
Cordeiro, O.; Silva, Tomé S.; Alves, Ricardo N.; Costas, B.; Wulff, Tune; Richard, Nadège; Vareilles, Mahaut; Conceição, L. E. C.; Rodrigues, PedroThe Senegalese sole, a high-value flatfish, is a good candidate for aquaculture production. Nevertheless, there are still issues regarding this species’ sensitivity to stress in captivity. We aimed to characterize the hepatic proteome expression for this species in response to repeated handling and identify potential molecular markers that indicate a physiological response to chronic stress. Two groups of fish ...
Feed deprivation in Senegalese sole (Solea senegalensis Kaup, 1858) juveniles: ...
Costas, B.; Aragão, C.; Ruiz-Jarabo, I.; Vargas-Chacoff, L.; Arjona, F. J.; Dinis, Maria Teresa; Mancera, J. M.; Conceição, L. E. C.The effects of prolonged feed deprivation were assessed on blood plasma metabolites and free amino acid levels in Solea senegalensis. Juvenile specimens were maintained at two experimental conditions (24 h fasted and 21 days feed-deprived). In feed-deprived fish, relative growth rate and hepatosomatic index as well as plasma triglycerides and proteins levels were significantly lower.