Changes between Version 1 and Version 2 of EwEugSearchRates
 Timestamp:
 20101123 01:35:17 (10 years ago)
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EwEugSearchRates
v1 v2 13 13 where ''Q,,ji,,'' expresses the consumption rate for consumer j of prey i. We can then solve for ''a,,ji,, = Q,,ji,,/(B,,j,,·B,,i,,)'', which defines the LotkaVolterra massaction term a the quotient of the amount of ''i'' consumed by'' j'', divided by the product of their biomasses. 14 14 15 This massaction term is used as ‘fixed support’ for the ‘lever’which, in Ecosim, regulates the consumption of predators, given the changing biomasses of their preys, and their own changing biomasses.15 This massaction term is used as 'fixed support' for the 'lever' which, in Ecosim, regulates the consumption of predators, given the changing biomasses of their preys, and their own changing biomasses. 16 16 17 The values of ''a'' depend obviously on the units used, and the biomass units used in Ecopath render difficult a direct interpretation of the numbers in the ‘Search rate’table. However, they can easily be converted into values of'' a'' applying to single organisms, given that the ratio of the individual prey and predator weights are divided into the values of ''a'' for each pair of prey and predator.17 The values of ''a'' depend obviously on the units used, and the biomass units used in Ecopath render difficult a direct interpretation of the numbers in the 'Search rate' table. However, they can easily be converted into values of'' a'' applying to single organisms, given that the ratio of the individual prey and predator weights are divided into the values of ''a'' for each pair of prey and predator.