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210Po and 210Pb activity concentrations in fish from the Slovenian part of Adriatic Sea, in the vicinity of a former uranium mine at ?irovski vrh and from the Slovenian market were determined. In addition, 210Po and 210Pb activity concentrations in squid from the Slovenian market and in mussels from the Slovenian part of the Adriatic Sea were also determined. Fish, squid and mussel consumption in Slovenia was assessed from the data available from Eurostat and Food and Agriculture Organisation (FAO) and the data used for the corresponding dose calculation. Fish species with the highest activity concentrations were grilled to assess possible loss of 210Po during the food preparation process. Samples were freeze dried and radiochemical separation of 210Po and 210Pb was performed. Measurements of 210Po were performed by alpha spectrometry and 210Pb by a low background gas-flow proportional counter. 210Po activity concentrations in fish, squid and mussels were from 0.039 to 35.0 Bq kg−1 fresh weight and 210Pb activity concentrations were from 0.08 to 3.03 Bq kg−1 fresh weight. Grilling of fish resulted in no significant loss of 210Po at 90 °C. The assessed combined annual effective ingestion dose due to 210Po and 210Pb for fish, squid and mussels consumed in Slovenia is 47.6 μSv year−1. 相似文献
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A. Simms 《Journal of Coastal Conservation》2002,8(1):35-48
The 1992 collapse of the northern cod fishery at Newfoundland, Canada and the subsequent closure of a majority of the inshore
ground fishery has placed a focus on the development of aquaculture within the province. In May 1995 Innovative Fisheries
Inc. of St. John's, Newfoundland, conducted field studies to evaluate the soft-shell clam (edible bivalve molluscs) resources
on three sand flats near Burgeo, Newfoundland. GIS can be used to examine issues regarding the development and management
of the soft-shell clam beds. GIS can also be applied to examine the issue of ‘competing uses’ for the proposed soft-shell
clam aquaculture site. The information presented in this study indicates that GIS is an important tool for the aquaculture
industry. These systems can be used to monitor, quantify and evaluate the soft-shell beds near Burgeo. Management issues such
as water quality, resource sustainability as well as the economic viability of the clam resource can be assessed within a
GIS environment. The results of the analysis in this study suggest potential problems with faecal coliform contamination from
local cottages. Finally, data collection for aquaculture site assessment is required if a resource is to be managed effectively.
GIS applications provide insights into the quality of the physical environment as well as the sustainability of a resource.
However, it is the aquaculture operators who ultimately make the final decisions. 相似文献
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Catalytic converters have been designed to solve the problem of pollution from automobiles. However, recent studies have shown that the platinum group metals (PGMs) that are used in the design are being deposited alongside highways. The objective of this study was to measure the levels of PGMs that bioaccumulate in Oreochromis niloticus, Penaeus laspisulcates, Scylla serrate, Galaxias brevipinnis and Mollusc in the river Pra estuary along a major highway in Ghana. Chemical analysis using neutron activation analysis showed accumulation of the PGMs in all the biota species analysed. The S. serrate and mollusc showed higher accumulation than the other species. The mollusc and the other fish species in the estuary are consumed in Ghana, and therefore there is the need to educate the population on the effect of the PGMs on their health. 相似文献
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