Encontrados 13 documentos, a visualizar página 1 de 2
Proteomics as a tool to develop molecular indicators of nutritional condition i...
Rodrigues, Pedro; Richard, N.; 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...
Skeletal quality in Senegalese sole: characterization of fish resulting from en...
Gavaia, Paulo J.; Dionísio, G.; Cardeira, J.; Cunha, M. E.; Pousão-Ferreira, P.; Conceição, L. E. C.; Cancela, LeonorThe Senegalese sole (Solea senegalensis) is characteristic from southern Europe and Mediterranean. It has recently been adapted for aquaculture production since it is well accepted by consumers and reaches high commercial values. After the initial description of the ontogenic events of skeletogenesis, systematic evaluation of the incidence of skeletal malformations by several groups revealed high levels of skel...
Nutrition, quality and performance in marine fish larvae
Conceição, L. E. C.; Alves-Martins, D.; Engrola, S.; Gavaia, Paulo J.; Richard, N.; Aragão, C.O cultivo de larvas de peixes marinhos é caracterizado por altas mortalidades e por problemas de qualidade, nomeadamente malformações esqueléticas. A solução de parte destes problemas passa por uma melhor compreensão dos requisitos nutricionais. Este trabalho pretende fazer uma revisão de trabalhos recentes que demonstram como os aminoácidos, os ácidos gordos e a vitamina K, mas também o regime alimentar, podem...
Daily oxygen consumption rhythms of Senegalese sole solea senegalensis (Kaup, 1...
Castanheira, F.; Martins, C. I. M.; Engrola, S.; Conceição, L. E. C.Senegalese sole is known to be a species with pronounced nocturnal feeding behaviour. However, as for most fish species, there is a lack of knowledge concerning the influence of such biological rhythmon metabolic rate. The aim of this study was to determine whether individual variation in routine and fed metabolic rate was affected by daily light–dark rhythms in juveniles of Senegalese sole. The individual oxyg...
Individual differences in metabolism predict coping styles in fish
Martins, C. I. M.; Castanheira, F.; Engrola, S.; Costas, B.; Conceição, L. E. C.Studies on metabolism usually rely on measurements of oxygen consumption obtained in respirometry chambers. Despite rigorous standardization there is still considerable interindividual variation in metabolic rates which is often ignored. Furthermore, housing in respirometry chambers implies handling and exposure to a new environment, conditions known to be a source of stress in animals. The extent of stress res...
Inclusion of protein hydrolysates in the diet of white seabream (Diplodus sargu...
Richard, N.; de Vareilles, M.; Gavaia, Paulo J.; Silva, Tomé S.; Cordeiro, O.; Yúfera, M.; Rodrigues, Pedro; Conceição, L. E. C.In order to investigate the effects of dietary protein hydrolysate on larval skeleton quality and larvae proteome expression, triplicate groups of white seabream (Diplodus sargus) larvae were co-fed from first-feeding onwards with live feed and three microencapsulated diets ir differing only on the molecular weight of their protein hydrolysate fraction.
Recent advances in nutrition of fish larval
Conceição, L. E. C.; Aragão, C.; Richard, N.; Engrola, S.; Gavaia, Paulo J.; Mira, S.; Dias, J.Os requisitos nutricionais de larvas de peixes são ainda mal compreendidos, o que leva a altas mortalidades e problemas de qualidade no seu cultivo. Este trabalho pretende fazer uma revisão de novas metodologias de investigação, tais como estudos com marcadores, genómica populacional, programação nutricional, génomica e proteómica funcionais, e fornecer ainda alguns exemplos das utilizações presentes e perspect...
Skeletal evaluation and technical improvements to decrease the incidence of ske...
Gavaia, Paulo J.; Richard, N.; Dâmaso, L.; Dinis, Maria Teresa; Pousão-Ferreira, P.; Engrola, S.; Conceição, L. E. C.; Cancela, LeonorThe appearance of skeletal deformities is a major problem associated to intensive, large-scale culture of fish species, affecting growth, development and ultimately, survival of produced fish. Although the mechanisms working behind it are still unclear, it is known that environmental, genetic and nutritional factors play fundamental roles. Given its importance as a vertebrate model to study skeleton-related dis...
Avanços recentes em nutrição de larvas de peixes
Conceição, L. E. C.; Aragão, C.; Richard, N.; Engrola, S.; Gavaia, Paulo J.; Mira, S.; Dias, J.Os requisitos nutricionais de larvas de peixes são ainda mal compreendidos, o que leva a altas mortalidades e problemas de qualidade no seu cultivo. Este trabalho pretende fazer uma revisão de novas metodologias de investigação, tais como estudos com marcadores, genómica populacional, programação nutricional, génomica e proteómica funcionais, e fornecer ainda alguns exemplos das utilizações presentes e perspect...
Hormonal induction of Atlantic dusky grouper (Epinephelus marginatus) broodstock
Conceição, L. E. C.; Cabrita, E.; Engrola, S.; Lacuisse, M.; Pousão-Ferreira, P.; Dinis, Maria TeresaImmature fish and young females were sex reversed using hormonal induction in two consecutive years. In the first year one permanent male was obtained. Collected sperm of both years ranges from 30 μl to 300 μl and cell concentration varies from 3 to 6.5 x109 spermatozoa/ml. Atlantic dusky grouper can successfully be induced to functional males with 17α-methyltestosterone implants.
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