Changes between Version 1 and Version 2 of EwEugPredationMortality


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Timestamp:
2010-11-23 01:28:52 (9 years ago)
Author:
shermanl
Comment:

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  • EwEugPredationMortality

    v1 v2  
    11== 7.7 Predation mortality == 
    2 The predation mortality of a group (''i'') is the sum of the consumption of ''i'' by the other groups, divided by the biomass of group (''i''). Predation mortality is calculated in the program, i.e., it is ''not'' an input parameter. Predation mortality corresponds to what is called ‘''M2''’ in some other models. 
     2The predation mortality of a group (''i'') is the sum of the consumption of ''i'' by the other groups, divided by the biomass of group (''i''). Predation mortality is calculated in the program, i.e., it is ''not'' an input parameter. Predation mortality corresponds to what is called '''M2''' in some other models. 
    33 
    44The ''Predation mortality'' form (Figure 7.2) is very important and should be checked frequently when balancing a model. 
     
    66To begin with, the [wiki:EwEugMortalityCoefficients Mortality coefficients] form will guide you to particular mortality coefficients that are causing problems with balancing. If predation mortality is too high then the ''Predation mortality'' form will help you identify which predators are causing the problem for a particular prey group. 
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    8 To help you identify possible problem predators, cells with unusually high predation mortalities will be shown with a different-coloured background instead of the usual blue background. Note that this is intended as a guide only to show which predators are contributing most to a prey species mortality. You should use the literature, expert opinion and your understanding of the ecosystem to decide which predation mortalities should be changed and by how much. 
     8To help you identify possible problem predators, cells with unusually high predation mortalities will be shown with a different-coloured background instead of the usual blue background. Note that this is intended as a guide only to show which predators are contributing most to a prey species' mortality. You should use the literature, expert opinion and your understanding of the ecosystem to decide which predation mortalities should be changed and by how much. 
    99 
    1010[[Image(wiki:EwEugImages:PredMortalitiesScreen_sc.bmp)]]