ISSN:
1439-0426
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
In 1992, wastes from a land-based trout (Oncorhynchus mykiss) farm on a small stream in Brandenburg were investigated. This trout farm consists of 15 basins with a total volume of about 170 m3 using open water recirculation without water purification. The water supply from the stream is about 110 L/s and about 240 L/s are recycled by pumps. In 1991, the total production of rainbow trout was 20 t. Investigations included the discharge of nitrogen, phosphorus, COD and suspended matter resulting from the fish production, measured as the difference between inflow and outflow water. The average daily output was 466 g/t nitrogen, 157 g/t phosphorus, 3145 g/t COD and 30 L/t suspended dry matter. The feed conversion ratio was 1.33 kg/kg gain. These results indicated a reduction in waste discharge by about 53% for nitrogen and 42% for phosphorus compared to previous results in former Eastern Germany.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1439-0426.1994.tb00180.x
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