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The influence of sulfathiazole on the macroalgae Ulva lactuca
Leston, Sara; Nunes, Margarida; Viegas, Ivan; Nebot, Carolina; Cepeda, Alberto; Pardal, M. A.; Ramos, FernandoSulfonamides (SA) are a class of antibiotics routinely found in environmental matrices and therefore their role as contaminants should be investigated in non-target organisms. With this purpose the present experimental work has evaluated the exposure of the chlorophycean Ulva lactuca L. to sulfathiazole (STZ), a SA drug commonly used in aquaculture, at two concentrations representing prophylactic (25 lgmL 1) an...
Disposition of [U-2H7]glucose into hepatic glycogen in rat and in seabass
Martins, Fátima O.; Rito, João; Jarak, Ivana; Viegas, Ivan; Pardal, M. A.; Macedo, M. Paula; Jones, John G.The stimulation of hepatic glycogenesis is a ubiquitous response to a glucose challenge and quantifying its contribution to glucose uptake informs its role in restoring euglycemia. Glycogenesis can be quantified with labeled water provided that exchange of glucose-6-phosphate hydrogen 2 (G6P-H2) and body water via glucose-6-phosphate isomerase, and exchange of positions 4, 5 and 6 hydrogens (G6P-H456) via trans...
Sources of blood glucose and liver glycogen in the seabass (Dicentrarchus labra...
Viegas, Ivan Daniel dos Santos MartinsTese de doutoramento em Biologia, na especialidade de Ecologia, apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra ; The Varian VNMRS 600 MHz spectrometer is supported by the National NMR Network (PTNMR) and was purchased in the framework of the National Programme for Scientific Re-equipment, contract REDE/1517/RMN/2005, with funds from POCI 2010, Fundo Europeu de Desenvolvimento Regio...
Predicting zooplankton response to environmental changes in a temperate estuari...
Marques, Sónia; Azeiteiro, Ulisses; Leandro, Sérgio; Queiroga, Henrique; Primo, Ana; Martinho, Filipe; Viegas, Ivan; Pardal, MiguelAbstract A novel strategy that allows to predict the responses of zooplanktonic species to environmental conditions in an estuarine temperate ecosystem (Mondego estuary) is presented. It uses 12 indicator species from the zooplanktonic Mondego database (102 species) that are common members of the different habitats, characterized by their specific hydrological conditions. Indicator-species analysis (ISA) was u...
Population dynamics, distribution and secondary production of the brown shrimp ...
Viegas, Ivan; Martinho, Filipe; Neto, João; Pardal, MiguelThe population structure, growth, distribution and secondary production of the brown shrimp Crangon crangon (L. 1758) were examined between June 2003 and August 2005 at five stations in the Mondego Estuary, Portugal, using a 2-m beam trawl. Occurrence of immature shrimps suggested almost continuous reproduction with two main recruitment periods in November and March/April; this recruitment pattern is unique and...
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