{"datasetrec":{"DasID":585,"Acronym":null,"StandardTitle":"MWTL biological monitoring network Westerschelde: Fish diseases","OrigTitle":"MWTL biologisch monitoring netwerk Westerschelde: Visziekten","OrigTitleLangID":41,"OrigTitleLangCode":"nl","OrigTitleLang":"Dutch","OrigTitleLangNL":"Nederlands","VersionName":"1","ContactEmail":null,"VersionDate":"Aug  8 2005 12:00AM","VersionDay":8,"VersionMonth":8,"VersionYear":2005,"SizeReference":null,"EngAbstract":"Sampling of fish and mussels in The Westerschelde. Determination of moisture and mercury content in muscle tissue, determination of metals, moisture and fat in liver tissue, determination of PCB, HCB, moisture and fat content in liver tissue and determination of blood metabolites.","EngDescr":"Sampling of fish takes place in the central area of ​​the Westerschelde, defined as the area between the plate Hooge Springer and the  Biezelingse Ham. It is intended that there are 80 male flounders (externally assessed as healthy) caught with a length distribution between 20 and 35 cm. These flounders are further analyzed by the Dutch Institute for Fisheries Research, IJmuiden: determination of moisture and mercury content in muscle tissue, determination of cadmium, moisture and fat in liver tissue, determination of PCB, HCB, moisture and fat content in liver tissue and determination of blood metabolites.\r\nSampling of mussels occurs in the eastern part of the Westerschelde once a year,  in the middle of October. In the field, mussels are collected, and divided into five size classes between 25 and 70 mm. From the collected mussels, the length, the weight of the shell, moisture, mercury, lead, cadmium, copper, zinc, chromium, arsenic, nickel PAHs (15), and PCB (28), pesticides and fat is determined.","OrigAbstract":"Bemonstering van vis en mosselen in de Westerschelde: bepaling van vocht en kwikgehalte in het spierweefsel, de bepaling van metalen, vocht en vet in leverweefsel, bepaling van PCB's, HCB, vocht-en vetgehalte in het leverweefsel en bepaling van bloed metabolieten.","OrigDescr":"Sinds 1983 maakt monitoring van visziekten en chemische analyses in vissen en mosselen onderdeel uit van het landelijke monitoringnetwerk MWTL (Monitoring Waterstaatkundige Toestand des Lands), waarmee Rijkswaterstaat een ‘vinger aan de pols’ houdt van de biologische, chemische en fysische ontwikkelingen in de Nederlandse rijkswateren. RIKZ coördineert de monitoringprogramma’s in de zoute en brakke wateren. Visziekten en gehalten van chemische verontreinigingen in vissen en mosselen worden als indicatoren voor de kwaliteit van de rijkswateren beschouwd. \r\nDe databestanden en producten uit deze monitoring vormen een onderdeel van de Nederlandse inbreng in het internationale meetprogramma ‘Joint Assessment and Monitoring Programma’ (JAMP). Dit programma is tot stand gekomen via de Oslo-Parijs Conventie (OSPAR) waaraan landen deelnemen die grenzen aan de Noordzee, plus IJsland, Ierland, Portugal en Spanje.\r\n\r\nIn de Westerschelde vinden van de genoemde metingen alleen chemische analyses van vissen en mosselen plaats (projectleider RIKZ: Victor Langenberg). De bemonstering van vissen en mosselen voor de chemische analyses in de Westerschelde wordt in opdracht van DG Water door het RIKZ en het Nederlands Instituut voor Visserijonderzoek uitgevoerd. \r\nDe bemonstering van vissen vindt plaats in het middengebied van de Westerschelde, gedefinieerd als de zone tussen de plaat Hooge Springer en de Biezelingse Ham. In dit gebied is het de bedoeling dat er 80 mannelijke botten (uitwendig als gezond te beoordelen) gevangen worden, met een bepaalde verdeling tussen de lengtes 20 en 35 cm. Deze botten worden door het Nederlands Instituut voor Visserij Onderzoek te IJmuiden nader geanalyseerd: bepaling van vocht- en kwikgehalte in spierweefsel, bepaling van cadmium-, vocht- en vetgehalte in leverweefsel, bepaling van PCB-, HCB-, vocht- en vetgehalten in leverweefsel en bepaling van bloedmetabolieten.\r\nDe bemonstering van mosselen vindt plaats in het oostelijke deel van de Westerschelde éénmaal per jaar, medio oktober. Dit wordt uitgevoerd door het RIKZ zelf. In het veld worden mosselen verzameld, verdeeld over vijf lengteklassen tussen 25 en 70 mm. Van de verzamelde mosselen wordt de lengte, het schelpgewicht en de gehalten van vocht, kwik, lood, cadmium, koper, zink, chroom, arseen, nikkel PAK’s (15), PCB’s (28), pesticiden en vet bepaald. Deze analyses worden uitgevoerd door het RIKZ.\r\nDe resultaten van deze monitoring worden in jaarlijkse rapporten vastgelegd, conform de aanbevelingen van de ICES verwoord in de ‘Recommendations on the Methodology of Fish Disease Surveys’. De gegevens worden opgeslagen in DONAR (Data Opslag Natte Rijkswaterstaat). Deze gegevens alsmede kopieën van de rapporten zijn op te vragen bij de Basisinfodesk RIKZ (070-314444; basisinfodesk@rikz.rws.minvenw.nl).","Comments":null,"ReleaseDate":null,"ReleaseDate0":null,"OrigDescrLang":"Dutch","EmbargoDate":null,"OrigDescrLangNL":"Nederlands","OrigLangCode":"nl","OrigLangCodeExtended":"dut","OrigLangID":41,"DescrCompFlag":0,"DescrTransFlag":0,"Citation":null,"AccessConstraints":null,"UDate":"2005-10-06","CDate":"2005-09-08","CurrencyDate":null,"RevisionDate":null,"DateLastModified":{"date":"2026-05-14 01:44:00.153333","timezone_type":1,"timezone":"+02:00"},"CheckedFlag":0,"PublicFlag":1,"VlizCoreFlag":1,"MarineFlag":1,"FreshFlag":0,"BrackishFlag":1,"TerrestrialFlag":0,"StatusID":1,"DasType":"Data","DasTypeID":1,"DasOrigin":"Monitoring: field survey","Progress":"In 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