Changes between Version 1 and Version 2 of EwEugOnTheNeedForInputParameters
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 20100205 16:58:32 (14 years ago)
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EwEugOnTheNeedForInputParameters
v1 v2 7 7 where the predation mortality term is the parameter that links the groups with each other. Ecopath balances the system using one production equation for each group in the system. For a system with three groups three production equations like the one above are used, i.e., 8 8 9 ../Resources/Images/0800000E.png'''Eq. 15'''9 [[Image(wiki:EwEugImages:0800000E.png)]] '''Eq. 15''' 10 10 11 11 where, ''P,,i,,'' is the total production of group ''i''; ''Y,,i,,'' is the catches of group ''i'', ''E,,i,,'' is the net migration of ''i'', and ''BA,,i,,'' the biomass accumulation. ''DC,,ij,,'',,,,is the proportion of the diet predator group'' i'' obtains from prey group ''j''. Bi is the biomass of group ''i''; ''Q/Bi'' is the consumption/biomass ratio of group'' i''. ''P/B,,i,,'' is the production/biomass ratio of group ''i''; ''EE,,i,,'' is the ecotrophic efficiency, i.e. (1  other mortality), of group'' i''.