Browsing by Author "Correia, Catarina"
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- Copepod production estimated by combining in situ data and specific temperature-dependent somatic growth modelsPublication . Leandro, Sérgio Miguel; Tiselius, Peter; Marques, Sónia Cotrim; Avelelas, Francisco; Correia, Catarina; Queiroga, HenriqueAlthough growth in adult copepods is frequently assumed to be similar to juvenile growth, some evidence have pointed out that under in situ conditions, it can be lower, with, as a consequence, underestimation of secondary production. In addition, under field conditions, juvenile growth in copepods is close to maximum rates estimated at food-saturated conditions. Based on previous assumptions, this study aimed to test the applicability of a new approach for copepod production estimate, derived from temperature-dependent growth models and in situ data, such as seawater temperature and copepod biomass. For this purpose, site-specific copepod juvenile growth models, defined for Acartia tonsa and A. clausi populations from a Southern European estuary (Canal de Mira, Ria de Aveiro, Portugal), were used and copepod biomass was taken fromzooplankton samples collected during 2 years at six sampling stations. By comparing the obtained results with published data, the feasibility of the approach for copepod secondary production estimates and its applicability in worldwide marine ecosystems was confirmed. Future studies should combine the estimates of adult and juvenile production in order to evaluate its relative contribution and to obtain a more precise estimate of secondary production.
- Do mar para o prato: biologia, ilustração e gastronomiaPublication . Leandro, Sérgio Miguel; Maranhão, Paulo; Barraca, Catarina; Correia, Catarina; Borges, Patrícia; Alexandre, António; Salgado, PedroPara as comunidades dependentes da pesca, a gastronomia de mar assume especial relevo para o seu desenvolvimento económico, contribuindo para a promoção e atratividade do seu território e consequente garante de muitos postos de trabalho. Do mar ao prato - biologia, ilustração e gastronomia integra para cada recurso a biologia/ecologia, o perfil nutricional, a gastronomia tradicional e a gastronomia moderna, salteada com a arte da ilustração cientifica.
- Trophic links and nutritional condition of fish early life stages in a temperate estuaryPublication . Primo, Ana Lígia; Correia, Catarina; Marques, Sónia Cotrim; Martinho, Filipe; Leandro, Sérgio; Pardal, MiguelThe physiological and nutritional condition of fish larvae affect their survival and thus, the success of estuaries as nursery areas. Fatty acid composition has been useful to determine fish nutritional condition, as well as trophic relationships in marine organisms. The present study analyses the fatty acid (FA) composition of fish larvae during spring and summer in the Mondego estuary, Portugal. FA composition, trophic markers (FATM) and fish nutritional condition was analysed for Gobiidae and Sardina pilchardus larvae and the relationships with the local environment evaluated. Results showed that both taxa differed mainly in the stearic acid (C18:0) and eicosapentaenoic acid (EPA) content, with important amounts in Gobiidae and S. pilchardus, respectively. Gobiidae larvae presenting high nutritional condition and omnivore FATM. Fatty acid composition seems to be related with their natural habitat selection and food availability, while fish larvae nutritional condition also showed a strong link with the water temperature and presence of potential predators. This study suggests that FA composition can be a useful tool in assessing planktonic trophic relationships and in identifying species natural habitat.