IPMA - DMRM - Relatórios Científicos e Técnicos do IPMA
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- RELAÇÕES ENTRE PESOS DE GÓNADAS FIXADAS E FRESCAS DE PEIXES DA COSTA PORTUGUESAPublication . Ana Maria Costa; Instituto Português do Mar e da AtmosferaThis work was based on samples from commercial fleet in the ports of Matosinhos, Peniche, Sesimbra and Portimão. The relationships between the weight of fresh and fixed gonad for one to six months of seven pelagic species - anchovy (Engraulis encrasicolus), Atlantic horse mackerel (Trachurus trachurus), blue horse mackerel (Trachurus picturatus), chub mackerel (Scomber colias), mackerel (Scomber scombrus), sardine (Sardina pilchardus) and blue whiting (Micromesistius poutassou) and one demersal species - hake (Merluccius merluccius) of the Portuguese coast were obtained with simple linear regressions, taking into account sex and maturity stage. The ANOVA tests applied to these relationships showed some significant differences, indicating the need to apply specific equations for each of those parameters.
- VARIAÇÃO DO COMPRIMENTO DA PESCADA NA PRIMEIRA MATURAÇÃO ENTRE 2000 E 2010 NA COSTA PORTUGUESAPublication . Costa, Ana Maria; I.P.Neste trabalho foi estimado o tamanho da pescada (Merluccius merluccius), na primeira maturação, na costa portuguesa pertencente à área de distribuição do stock sul (Divisões VIIIc e IXa do ICES). Os dados recolhidos nos cruzeiros de primavera e outono de 2000 a 2010 foram analisados numa base anual, considerando em separado fêmeas, machos e sexos combinados. O L50 foi sempre superior para as fêmeas, com um valor médio de 41,3 cm para todos os anos estudados, e de 27,1 cm para os machos, o que se traduziu num comprimento médio de 34,5 cm dos dois sexos na primeira maturação para o período 2000-2010. Foram também analisados os valores da temperatura da superfície do mar, que registaram uma média de 16,7º C para este período.
- Report of the Workshop on Sampling Design and Optimization of fisheries data - WKSDOPublication . Azevedo, Manuela; Silva, Cristina; Vølstad, Jon Helge; Prista, Nuno; Alpoim, Ricardo; Moura, Teresa; Figueiredo, Ivone; Dias, Marina; Fernandes, Ana Cláudia; Lino, Pedro G.; Felício, Mónica; Chaves, Corina; Soares, Eduardo; Dores, Sandra; Gonçalves, Patrícia; Costa, Ana Maria; Nunes, Cristina; Instituto Português do Mar e da Atmosfera, I.P.O “Workshop on Sampling Design and Optimization (WKSDO)”, presidido pelas investigadoras Cristina Silva e Manuela Azevedo (IPMA) e o investigador Norueguês Jon H. Vølstad (IMR), decorreu no IPMAAlgés, de 17 a 20 de Novembro de 2014, para analisar o actual Programa Nacional de Amostragem Biológica (PNAB/Data Collection Framework) com o objectivo de optimizar o programa de amostragem em lota para estimação da composição por comprimento da captura/desembarque das espécies capturadas pela frota nacional, de amostragem das capturas a bordo e da amostragem biológica para estudos de crescimento e reprodução. O Workshop, organizado no âmbito do projecto de investigação nacional GesPe (Planos de Gestão Pesqueira, PROMAR) e do PNAB/DCF, foi planeado e calendarizado tendo em conta o início do processo de revisão do programa Europeu de recolha de dados da pesca de suporte à avaliação e gestão dos recursos pesqueiros (DFC). Foram analisados e discutidos vários métodos e abordagens que resultaram num conjunto de instruções e recomendações para trabalho futuro, relevantes para assegurar uma elevada qualidade e optimização do futuro programa de amostragem.
- TRACEABILITY AND LABELLING OF SEAFOOD IN ATLANTIC AREA REGIONSPublication . Mendes, Rogério; Griffiths, Andrew; Mariani, Stefano; Sotelo, Carmen; Velasco, Amaya; Smith, Catherine; Shorten, Marc; Verrez-Bagnis, Véronique; Silva, Helena; Instituto Português do Mar e da Atmosfera, I.P.Project Labelfish – the “Atlantic Network on Genetic Control of Fish and Seafood Labelling and Traceability” is a European project that aims to set up a network of entities with an interest in the use of standardised, innovative analytical techniques to control genetic traceability and labelling of seafood products. Within this project one of the objectives is the analysis of fish traceability and fish labelling in markets of the Atlantic region (Portugal, Spain, France, United Kingdom and Ireland). This report is an overview of the current situation of seafood traceability and fish labelling in the countries of the Atlantic region. Information recorded includes the national and European legislation regulating the seafood chain, fish species identification methods in national legislation, identification of the stakeholders involved, traceability schemes used, transference of information and data elements between stakeholders and finally evaluation of bottlenecks for improved traceability
- CONTROL OF SEAFOOD LABELLING IN PORTUGALPublication . Mendes, Rogério; Silva, Helena; Instituto Português do Mar e da Atmosfera, I.P.Project Labelfish – the “Atlantic Network on Genetic Control of Fish and Seafood Labelling and Traceability” is a European project that aims to set up a network of entities with an interest in the use of standardised, innovative analytical techniques to control genetic traceability and labelling of seafood products. Within this project one of the objectives is the analysis of fish labelling in markets of the Atlantic region (Portugal, Spain, France, United Kingdom and Ireland). This report summarizes the level of implementation of seafood labelling control across the Portuguese seafood sector. Main areas focused in the report include, (i) identification of the bodies involved in the control and evaluation of seafood labelling, (ii) assessment of the experience and results of the Portuguese administration in relation with the effective control of seafood labelling, (iii) survey of annual control plans and modus operandi and (iv) statistics of level of compliance.
- PROSPECÇÃO DOS BANCOS DE MOLUSCOS BIVALVES NA COSTA OCIDENTAL SUL PORTUGUESA (JUNHO 2014)Publication . Gaspar, Miguel; Moura, Paula; Pereira, Fábio; Instituto Português do Mar e da AtmosferaA bivalve survey was carried out along the Southwest coast of Portugal, in June 2014, with the objective of assessing the conservation status of the commercial species (Spisula solida, Chamelea gallina, Ensis siliqua, Callista chione and Donax spp.). In terms of spatial distribution, it was observed an increase for E. siliqua and S. solida and a decrease for Donax spp. For the other two species the distribution remained unchanged comparatively to 2010. In the case of S. solida although it was registered an increase of mean fishing yield, a low proportion of juveniles in the catch was also observed. The results obtained for C. chione evidenced an overexploitation of the adult fraction. The mean fishing yield increase significantly for E. siliqua and decreased for Donax spp. Based on these findings several management measures were proposed.
- PONTO DE SITUAÇÃO DOS BANCOS DE BIVALVES NA COSTA SUL PORTUGUESAPublication . Gaspar, Miguel; Moura, Paula; Pereira, Fábio; Instituto Português do Mar e da AtmosferaA bivalve survey along the Portuguese south coast was carried out, between 2 and 12 of June 2014, aiming at assessing the status of the bivalve beds of the commercial species, namely the white clam (Spisula solida), striped venus (Chamelea gallina), razor clam (Ensis siliqua) and surf clam (Donax trunculus). The mean fishing yield observed for white clam, striped venus and surf clam showed a positive and highly significant evolution suggesting the possibility of increasing their daily quotas for both local and coastal vessel segments. On the contrary, for razor clam a significant decrease was observed and therefore the interdiction of its exploitation during the next two years is proposed.
- EFEITO DA ARMAZENAGEM EM REFRIGERADO NA QUALIDADE DE FIAMBRE DE CORVINA COM FIBRAS DIETÉTICAS EMBALADO EM VÁCUO E EM ATMOSFERA MODIFICADAPublication . Patriarca, J.; Ribeiro, A.T.,; Silva, H.; Vieira, H.; Teixeira, B.; Rodrigues, M.J.; Gil, M.; Pousão, Ferreira P.; Mendes, R.; Instituto Português do Mar e da AtmosferaThe development of novel fish-based functional foods is increasing due to consumer’s search for healthier food products to create a daily balanced diet. The final goal of the present work was to evaluate the quality during refrigerated conditions of meagre ham enriched with dietetic fibers and packaged in vacuum and in modified atmosphere (20% or 40% CO2). The proximate chemical composition indicated that meagre ham had 76.7% of moisture, 5.1% of fat, 3.9% of ash, 11.1% of protein and 3.2% fiber. The 55-day stability study revealed that the fish ham‘s shelf life did not vary with different packaging conditions, but was limited by microbial growth. Its quality was acceptable up to thirteen days in refrigerated conditions for all packages used.
- CONSERVAÇÃO EM REFRIGERADO DE FIAMBRES DE CORVINA E DOURADA EMBALADOS EM ATMOSFERA MODIFICADAPublication . Patriarca, J.; Ribeiro, A.T.; Silva, H.; Vieira, H.; Teixeira, B.; Rodrigues, M.J.; Gil, M.; Pousão-Ferreira, P.; Mendes, R.; Instituto Português do Mar e da AtmosferaThe search for healthier food products has increased the development of novel fish-based functional foods. In the present work the quality changes during refrigerated storage of meagre and sea bream hams enriched with dietetic fibers and packaged in modified atmosphere (30 % CO2 / 70 % N2) were evaluated. The fish hams had a good sensory acceptance and in microbiological terms were acceptable until at least 20 days. The consumption of 25 grams of meagre ham guarantees 6.0 % and 4.8 % of the DDR of fiber and EPA+DHA, respectively, while seabream ham provides 7.2 % and 17.7 %. The meagre and seabream hams with dietary fibers are two hypocaloric products very interesting nutritionally for a market of consumers demanding fish-based products that also promote health and well-being.
- OLIGÓMEROS DE QUITOSANA, PREPARAÇÃO E PROPRIEDADES BIOLÓGICAS: UMA REVISÃO BIBLIOGRÁFICAPublication . Batista, Irineu; Andrade, Inês; Silva, Helena Alves daChitin and chitosan possess many functional properties offering them a wide range of applications. However, chitin is only soluble in very specific solvents whereas chitosan is soluble in diluted acid solutions, highly viscous. These problems of solubility in physiological conditions have limited their biological applications. In order to overcome these problems numerous studies have been developed on the preparation of oligomers from these biopolymers. These oligomers are water-soluble, present low viscosity and are absorbed in the human intestine. These studies concerned the development of different methods on the oligomers preparation and the evaluation of their biological activities. The current work is a review of the chemical and enzymatic methods used in the preparation of oligomers, includings the chemical hydrolysis mechanisms, and also the results obtained in the characterization of their biological activities.