Changes between Version 1 and Version 2 of EwEugBasicInput


Ignore:
Timestamp:
2010-11-23 01:02:33 (9 years ago)
Author:
shermanl
Comment:

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  • EwEugBasicInput

    v1 v2  
    1414'''Production/biomass''' 
    1515 
    16 Enter the Production/Biomass (''P/B'') ratio for each group using consistent units, i.e., per year. The ''P/B'' ratio is equivalent to the instantaneous rate of total mortality (''Z'') used by fisheries biologists (Allen 1971). Entry of ''P/B'' ratios is optional. 
     16Enter the Production / Biomass (''P/B'') ratio for each group using consistent units, i.e., per year. The ''P/B'' ratio is equivalent to the instantaneous rate of total mortality (''Z'') used by fisheries biologists (Allen 1971). Entry of ''P/B'' ratios is optional. 
    1717 
    1818Production includes fishery yield plus predation plus net migration plus biomass change plus other mortality; or 
     
    3030'''Ecotrophic efficiency''' 
    3131 
    32 The ecotrophic efficiency (''EE'') is the fraction of the production that is used in the system, i.e. either passed up the food web, used for biomass accumulation, migration or export. Ecotrophic efficiency is difficult to measure directly. It varies between 0 and 1 and can be expected to approach 1 for groups with considerable predation pressure. The part of the production that is not included in the EE is often called ‘[wiki:EwEugOtherMortality other mortality]’. EE is dimensionless, and the entry of EE values is optional. 
     32The ecotrophic efficiency (''EE'') is the fraction of the production that is used in the system, i.e. either passed up the food web, used for biomass accumulation, migration or export. Ecotrophic efficiency is difficult to measure directly. It varies between 0 and 1 and can be expected to approach 1 for groups with considerable predation pressure. The part of the production that is not included in the EE is often called '[wiki:EwEugOtherMortality other mortality]'. EE is dimensionless, and the entry of EE values is optional. 
    3333 
    3434The ecotrophic efficiency of a detritus group is defined as the ratio between the flow out of a detritus box, and the flow into the same box. ''EE'' for detritus cannot be entered, it is always calculated.