Acronym NA
Category
Aquaculture
Title Jern og toksiske blandsoner i norske settefiskanlegg - bruk av silikat-lut som tiltaksmiddel - Iron and toxic mixed zones in Norwegian hatcheries: Use of silicate lye as a measure Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Brit Salbu Coordinator email brit.salbu@umb.no
Coordinator institution
NMBU - Norwegian University of Life Sciences (Norway)
Institutions involved
NA
Start year 2006 End year 2009 Funding (€) € 435,901 Website https://www.fhf.no/prosjekter/prosjektbasen/522022/ Summary Various sources can contribute to elevated levels of Fe in operating water at hatcheries: ferrous groundwater or humic surface water such as raw water, as well as feed residues and blood / excrement from fish. Fe can exist in various physico-chemical state forms, from simple ions to complexes, colloids and particles. If the pH, ionic strength or redox ratio changes, unstable operating water mixing zones occur where toxic Fe species can form. Non-toxic Fe species can be transformed into toxic Fe species due to different modes of operation (aeration, O2 addition, seawater addition, use of UV / ozone). The VK database 1999-2004 shows that Fe toxicity is a greater problem for the hatchery industry in Norway than previously assumed, with large financial losses for the industry. The data periodically show high Fe levels both in operating water and on fish gills, especially in facilities with groundwater and humus surface water as raw water. Although ocher precipitation on gills and mortality is a known phenomenon, the need for knowledge related to Fe sources and toxic Fe species in unstable operating water mixing zones in hatcheries is very large. The project will provide basic knowledge about processes and mechanisms that are the cause of Fe toxicity in Norwegian hatcheries.
Goals:
To identify sources and processes that contribute to toxic state forms of iron (Fe) in unstable operating water mixing zones.
To characterize detoxification mechanisms, especially related to the use of silicate lye (sodium silicate) as a detoxification agent to increase the survival of produced salmonids in problem plants.
Keywords
Salmon;
Impacts;
Land-based aquaculture;
Toxic substances;
Protocol;
Fish;
Marine Region
76
Not associated to marine areas
0
Marine Region Map
