Fishery products. Quality, safety and technological innovation. IPIMAR Scientific Technical Journeys Proceedings (11 -12 October 2001)

Esta colecção "Publicações Avulsas do IPIMAR", substitui a anterior "Publicações avulsas do INIP".A qualidade e segurança dos produtos da pesca deve constituir preocupação tanto para produtores como para consumidores. A inovação tecnológica é fundamental para o desenvolvimento de novas metodologias de conservação e processamento e também para o lançamento de novos produtos que melhor satisfaçam as solicitações actuais do mercado. Esta publicação dá a conhecer as mais recentes inovações introduzidas na fileira da pesca desde a conservação e manuseamento até à qualidade e segurança destes produtos junto do consumidor e divulgar as actividades e resultados obtidos no IPIMAR. São apresentados trabalhos sob a forma de comunicações orais e paineis, bem como apresentações feitas nas mesas redondas da reunião (Jornadas Técnicas e Científicas do IPIMAR, 11 - 12 de Outubro de 2001).info:eu-repo/semantics/publishedVersio

Seminar on fishery resources, environment, aquaculture and fish quality in the Setúbal peninsula (Setúbal, 26 - 27 April 1994)

Esta colecção "Publicações avulsas do IPIMAR" substitui a anterior "Publicações avulsas do INIP"A Operação Integrada de Desenvolvimento da Península de Setúbal (OID/PS) englobou na Medida VI um programa constituído por onze projectos de investigação sobre os recursos da pesca, aquacultura, ambiente e tecnologia dos produtos aquáticos que foi executado pelo INIP/IPIMAR. Este programa, com uma duração prevista de três anos (1990-1993), teve uma execução material de apenas dois para a maioria dos projectos e ocorreu, fundamentalmente, na área geográfica que engloba o estuário do Sado, a margem esquerda do Tejo, a lagoa de Albufeira e toda a orla costeira adjacente a estes ecossistemas. Os trabalhos incidiram na caracterização ambiental, nos estudos da cultura de espécies com interesse comercial, do ordenamento aquícola e dos recursos pesqueiros, bem como estudos de controle de qualidade e de valorização de algumas espécies.info:eu-repo/semantics/publishedVersio

Foraging habitat selection by Little Terns Sternula albifrons in an estuarine lagoon system of southern Portugal

We assessed the effects of environmental variables on the distribution and feeding behaviour of adult Little Terns Sternula albifrons in Ria Formosa Natural Park, Algarve, southern Portugal, in different foraging habitats (main lagoon, salinas and sea) during the breeding seasons, April2013July, of 2003201305. Foraging density was higher in the lagoon than in the sea, and at low tide. The number of foraging individuals at sea was independent of tide. Individual Little Terns foraged further from the nearest breeding colony in April and May (courtship feeding and incubation) than in June and July (chick-rearing). During intermediate tidal phases, individuals foraged further from the nearest colony, and followed main lagoon channels, perhaps because stronger currents increased prey availability. Diving activity and foraging success were higher in 2003 than 2004 or 2005, perhaps because of greater availability of marine prey in 2003. Diving rate was higher in July (when independent juveniles began learning how to forage) but diving success was higher in June (chick-rearing) than in other months. The variables selected by the final logistic models reflected four basic needs for the selection of feeding habitats by Little Terns: (1) association between foraging individuals, (2) areas with abundant feeding resources, (3) entrance channels and main lagoon channels with strong currents, and (4) the proximity to areas with alternative feeding resources, the salinas. Areas subjected to strong human pressure were avoided by foraging Little Terns

Integrated approach to assess ecosystem health in harbor areas

Harbors are critical environments with strategic economic importance but with potential environmental impact: health assessment criteria are a key issue. An ecosystem health status approach was carried out in Portimão harbor as a case-study. Priority and specific chemical levels in sediments along with their bioavailability in mussels, bioassays and a wide array of biomarkers were integrated in a biomarker index (IBR index) and the overall data in a weight of evidence (WOE) model. Metals, PAHs, PCBs and HCB were not particularly high compared with sediment guidelines and standards for dredging. Bioavailability was evident for Cd, Cu and Zn. Biomarkers proved more sensitive namely changes of antioxidant responses, metallothioneins and vittellogenin-like proteins. IBR index indicated that site 4 was the most impacted area. Assessment of the health status by WOE approach highlighted the importance of integrating sediment chemistry, bioaccumulation, biomarkers and bioassays and revealed that despite some disturbance in the harbor area, there was also an impact of urban effluents from upstream.Program Project PORTONOVO — Water Quality in Harbors, funded by EFDR-EU ref nº 2009-1/119info:eu-repo/semantics/publishedVersio

Export of dissolved and suspended matter from the main estuaries in South Portugal during winter conditions

Estuaries are essential drivers of primary productivity in coastal waters through the export of dissolved and suspended material. This study aims at quantifying this fertilization process at the two main estuaries in South Portugal, where typical low river discharge conditions occur in winter due to strong flow regulation by upstream dams and seldom-local rain events. Data were collected across the channel of the lower Arade (10/01/2018) and Guadiana (04/02/2019) estuaries during a semi-diurnal tidal cycle with intermediate tidal ranges (1.5 m and 2.2 m, respectively). Current velocity records were completed with hourly water quality measurements (temperature, salinity, pH, dissolved oxygen, suspended solids, chlorophyll a and nutrients) for determination of the along channel fluxes and residual mass transport of dissolved and suspended matter across the channel sections. The results show that the two estuaries were characterized by distinct water circulation patterns and tidal properties (e.g., standing wave at the Arade, mixed wave at the Guadiana). The concentration of dissolved and particulate matter displayed a general similar anti-phase pattern of variations with tidal height at both sites. The corresponding fluxes were generally strongest during the ebb phase. Thus, the residual mass transport was seaward, indicating that both estuaries contribute to fertilize adjacent coastal waters by exporting nutrients (order of kg), chlorophyll a (order of kg) and suspended solids (up to tons). Moreover, transport differences at both estuaries reflect specific discharge flow and environmental conditions as well as contamination sources close to the study areas. In particular, the signatures of a discharge event from a water treatment plant at the Arade and of coastal upwelling at the Guadiana were identified.FCT (Fundacao para a Ciencia e Tecnologia, Portugal)Portuguese Foundation for Science and Technology [IF/00661/2014/CP1234]FCTPortuguese Foundation for Science and TechnologyEuropean Commission [UID/MAR/00350/2013]info:eu-repo/semantics/publishedVersio