ISSN:
1439-0426
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
The impact of a common brown trout farm on water quality was investigated at a site well flushed by lapping and tidal current. Dissolved oxygen, suspended matter, phosphate, nitrite and nitrate were seemingly not affected by the farm. High concentrations of ammonia were clearly observed close to the raft, but rapidly vanished a short distance from it, when the fish biomass was at least 576 tonnes. At that time the nitrogen loadings from the farm were estimated at 101 kg/day. On the site, phytoplankton was similar to that of the nearby French coastal area of the English Channel, concerning generic composition (extensively dominated by diatoms) and the seasonal succession of genera. The farm did not cause any increase of faecal coliform bacteria. At this stock level, the dispersal characteristics of the farm site greatly reduced its apparent impact on the water quality.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1046/j.1439-0426.2002.00306.x
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