Changes between Version 2 and Version 3 of EwEugOnTheNeedForInputParameters


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Timestamp:
2010-11-21 22:27:47 (9 years ago)
Author:
shermanl
Comment:

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  • EwEugOnTheNeedForInputParameters

    v2 v3  
    11== 2.3 On the need for input parameters == 
    22 
    3 Not all parameters used to construct a model need to be entered. The Ecopath model ‘links’ the production of each group with the consumption of all groups, and uses the linkages to estimate missing parameters, based on the mass-balance requirement of equation (1) that production from any of the groups has to end somewhere else in the system. This can be expressed, where there is not accumulation of biomass as 
     3Not all parameters used to construct a model need to be entered. The Ecopath model 'links' the production of each group with the consumption of all groups, and uses the linkages to estimate missing parameters, based on the mass-balance requirement of equation (1) that production from any of the groups has to end somewhere else in the system. This can be expressed, where there is not accumulation of biomass as 
    44 
    55Production = Catch + biomass accumulation + predation mortality + net migration + other mortality