NUTRIENT EMISSION AND PELAGIC ECOSYSTEM EFFECT OF SALMON AQUACULTURE IN THE NORD-MORE REGION

摘要: The main objective of this thesis was to estimate nutrient emission rate carbon (C), nitrogen (N) and phosphorous (P) waste from salmon farms evaluate the environmental impact aquaculture on planktonic ecosystems in Nord-More region summer period June September 2011. 22 fish produced 37,114 tonnes wet weight (WW) period. Emission rates wastes were estimated for every month based information about use feed mean food conversion county, together with measurable coefficients describing elemental C, N P composition digestibility components feed. Of total input, 64 % 59.2 75.2 released into environment Nord–More area, corresponding 390 kg 38.7 7.8 per metric tonne WW produced. We predicted that 42 C 47 respired as CO2 excreted dissolved inorganic (DIN), respectively, 44 solid waste. Through measurement, results showed there no significant differences among concentrations biological variables between sampling stations respective reference stations. Therefore, we found effect farm activities area (Jun-Sep). Furthermore, many surrounding 2 stations, could expect concentration different nutrients plankton biomass at (PV1 & PV2) would be higher than those (BA1 BA2). However, PV1 lower BA1 (except particulate organic concentration).