Encontrados 14 documentos, a visualizar página 1 de 2
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...
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...
Rearing larvae of dusky grouper, Epinephelus marginatus (Lowe, 1834), (Pisces: ...
Cunha, M. E.; Quental, H.; Barradas, A.; Pousão-Ferreira, P.; Cabrita, E.; Engrola, S.One of the major obstacles to propagating dusky grouper, Epinephelus marginatus, is the difficulty of rearing the early larvae. We have successfully raised dusky grouper larvae in mesocosms using a mixed diet of endogenous plankton grown in the rearing tank and an exogenous supply of Brachionus plicatilis and Artemia sp. Newly hatched larvae at an initial density of 1.3 ind.l-1 were stocked in partially shaded ...
Antemortem versus postmortem methods for detection of betanodavirus in Senegale...
Olveira, J. G.; Soares, F.; Engrola, S.; Dopazo, C. P.; Bandín, I.The suitability of nested reverse transcription polymerase chain reaction (nRT-PCR) to detect betanodavirus in blood samples from naturally infected Senegalese sole (Solea senegalensis) was evaluated in comparison with other diagnostic methods. Results indicated that histologic examination of brain lesions could be regarded as the most consistent indicator of nodavirus infection in this species. The nRT-PCR sho...
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.
Improving growth performance of Senegalese sole postlarvae
Engrola, S.Tese dout., Aquacultura, Universidade do Algarve, 2008
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||