Brukerveiledning og miljøstandarder for overvåkningsprogram i oppdrett MOM (modellering - overvåkning - matfiskeanlegg)

MOM (Monitoring-Ongrowing fish farms-Modelling) is a management system which can relate the environmental impact from fish farms to the holding capacity of a site. The holding capacity is defined as the sediments ability to receive organic effluents without causing the benthic impact to exceed predefined levels. The system consists of three integrated parts: 1) environmental quality standards, 2) a standardized monitoring program for checking the environmental conditions on a site according to environmental quality standards, and 3) a mathematical model for predicting the expected environmental impact in relation to farm specifications and infonnations on the hydrography and topography of the site. MOM is described in the ICES report (C.M 1994/F:26): "Case histories and new approaches to planning and modelling in Norwegian mariculture" (Ervik and Kupka Hansen, 1994). The present report is a first version of the monitoring program and the environmental quality standards. A revised version will be published at the end of 1995. We operate with three degrees of exploitation of a site, relating the benthic impact of the farm to the holding capacity of the site. A standard monitoring program consisting of three types of investigations (A, B and C) is carried out for each degree of exploitation, but the heavier the site is exploited the more frequent the investigations. The boundaries between the three degrees of exploitation are defined in relation to a group of benthic environmental quality standards. The A-investigation is a simple sedimentation measurement to inform the fish farmer of possible excess feeding. The investigation can be performed frequently and by the farmers themselves.NORSK SAMMENDRAG:Rapporten beskriver et overvåkningsprogram for fiskeoppdrett som er en del av et system til å regulere miljøvirkninger fra marine oppdrettsanlegg etter bæreevnen i området (MOM). Systemet er beskrevet i Rapport nr 23, 1993, Havforskningsinstituttet, Senter for havbruk, og består av tre integrerte deler: 1) grenseverdier for miljøvirkning (miljøstandarder), 2) et standardisert overvåkingsprogram som kan kontrollere miljøtilstand i forhold til miljøstandardene, og 3) en matematisk modell som kan beregne forventet påvirkning når nødvendige opplysninger om anlegg og lokalitet er gitt. Overvåkingsprogrammet består av tre typer undersøkelser: A, B og C. A-undersøkelsen er en enkel undersøkelse av det partikulære utslipp fra anlegget, og kan foretas av oppdretteren selv