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Reproductive biology of the sea cucumber Holothuria mammata (Echinodermata: Hol...
Venâncio, Eliana; Félix, Pedro M.; Brito, Ana C.; Silva, Francisco Azevedo e; Simões, Tomás; Sousa, João; Mendes, Susana; Pombo, AnaHolothuria mammata is one of the most valuable species of sea cucumber, as well as one of the main target species harvested in the Mediterranean and NE-Atlantic regions. This study aims to describe the reproductive cycle of H. mammata in a coastal area of southwest Portugal. Monthly samplings were carried out for 19 months, with the concomitant collection of environmental data and biometric data. H. mammata had...
Do broodstock diets influence viability and larval development of Holothuria ma...
Venâncio, Eliana; Félix, Pedro M.; Brito, Ana C.; Sousa, João; Silva, Francisco Azevedo e; Simões, Tomás; Narciso, Luís; Amorim, Ana; Dâmaso, LuísaThe intensive exploitation of sea cucumbers, mainly exported to Asian seafood markets, has contributed to deplete natural populations of several species. In Europe, the aquaculture production of these echinoderms is minimal, reflecting the low scientific production on the topic. In Portugal, like in Mediterranean countries, there are native species with high commercial value, which can be potential candidates f...
Modelling the distribution of a commercial NE-Atlantic Sea Cucumber, Holothuria...
Félix, Pedro M.; Pombo, Ana; Silva, Francisco Azevedo e; Simões, Tomás; Marques, Tiago A.; Melo, Ricardo; Rocha, Cristina; Sousa, João; Venâncio, ElianaThere is an increasing demand for sea cucumbers, for human consumption, mainly from Asian markets and, as a consequence, NE-Atlantic species are now new targets for exploitation and exportation. Holothuria mammata is one of the most valuable species in Europe. However, the lack of historical economic interest in this species in most European countries has also led to a lack of studies concerning biological and ...
The effects of stocking density on physiological traits in Holothuria forskali ...
Sousa, João; Félix, Pedro M.; Brito, Ana C.; Venâncio, Eliana; Silva, Francisco Azevedo e; Simões, Tomás; Raposo, Andreia; Neves, Marta; Narciso, LuísThe high demand of sea cucumbers in international markets, mostly based in Asia, has left a deep impact on the natural stock of many species, leading to an investment in aquaculture techniques in order to mitigate these impacts. This study aimed to determine the effects of stock density in rearing broodstock of Holothuria (Panningoturia) forskali Delle Chiaje, 1823, a common species in the Mediterranean Sea and...
Colour profile analysis of Port Wines by different instrumental and visual methods
Soares-da-Silva, Francisco A. G.; Campos, Francisco M.; Ferreira, Manuel L.; Ribeiro, Natália; Amaral, Bento; Simões, Tomás; Silva, Cristina L. M.BACKGROUND: Wine colour is an important quality parameter, being the first sensorial attribute evaluated during wine tasting. The perception of wine colour can be different depending on many factors, including the depth of the sample under observation. The main objectives of the present study were to measure the colour of Port wines, using CIE L*a*b* parameters at different depths with different instrumental te...
Colour assessment of Port wines using colourimetric and spectrophotometric methods
Silva, Francisco A. G. Soares; Campos, Francisco M.; Ferreira, Manuel L.; Ribeiro, Natália; Amaral, Bento; Simões, Tomás; Silva, Cristina L. M.Colour is an important quality parameter in wines and is the result of a complex mixture of pigments (including anthocyanins and their derivatives, quinones, xanthyllium compounds, etc.). Red wine colour changes over time, as pigments react between themselves and with other wine macromolecules (particularly polyphenols) [1]. During wine tasting, colour is normally assessed on the outer rim of the wine profile i...
Analysis of six fungicides and one acaricide in still and fortified wines using...
Martins, Joana; Esteves, Cristina; Limpo-Faria, Ana; Barros, Paulo; Ribeiro, Natália; Simões, Tomás; Correia, Manuela; Delerue-Matos, CristinaA multiresidue gas chromatographic method for the determination of six fungicides (captan, chlorthalonil, folpet, iprodione, procymidone and vinclozolin) and one acaricide (dicofol) in still and fortified wines was developed. Solid-phase microextraction (SPME) was chosen for the extraction of the compounds from the studied matrices and tandem mass spectrometry (MS/MS) detection was used. The extraction consists...
Determination of 24 pesticide residues in fortified wines by solid-phase microe...
Martins, Joana; Esteves, Cristina; Simões, Tomás; Correia, Manuela; Delerue-Matos, CristinaThe present work describes a solid-phase microextraction (SPME) gas chromatography_tandem mass spectrometry (MS/MS) method to quantify 24 pesticides in fortified white wine and fortified red wine. In this study “fortified wine” refers to a wine in which fermentation is arrested before completion by alcohol distillate addition, allowing sugar and alcoholic contents to be higher (around 80-100 g/L total sugars an...
Multiresidue method for the determination of organophosphorus pesticides in sti...
Martins, Joana; Esteves, Cristina; Limpo-Faria, Ana; Barros, Paulo; Ribeiro, Natália; Simões, Tomás; Correia, Manuela; Delerue-Matos, CristinaA SPME-GC-MS/MS method for the determination of eight organophosphorus pesticides (azinphos-methyl, chlorpyriphos, chlorpyriphos-methyl, diazinon, fenitrothion, fenthion, malathion, and methidathion) in still and fortified wine was developed. The extraction procedure is simple, solvent free, and without any sample pretreatment. Limits of detection (LOD) and quantitation (LOQ) values in the range 0.1–14.3 lg/L a...
Impacto da contaminação fúngica sobre a competitividade de vinhos - Ocratoxina A
Cerdeira, António; Venâncio, Armando; Alves, Arminda; Barros, Paulo; Simões, Tomás[Extrato] Esta publicação reúne as comunicações apresentadas na conferência «Impacto da contaminação fúngica sobre a competitividade de vinhos - Ocratoxina A» realizada a 13 de Junho de 2003, na Faculdade de Engenharia da Universidade do Porto, Portugal.[...]