Changes between Version 2 and Version 3 of EwEugEcospaceParameters


Ignore:
Timestamp:
2010-11-23 09:26:43 (9 years ago)
Author:
shermanl
Comment:

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  • EwEugEcospaceParameters

    v2 v3  
    5858Ecospace can be used to predict distribution of fishing effort over space for each of the fleets. Fishing effort is assigned to spatial cells through a 'gravity model', wherein effort is proportional to the net benefits gained from exploiting a given cell. 
    5959 
    60 In the simple case that all exploited group have the same economic value (default = 1 monetary unit per tonne), and that all cells require the same sailing cost (default), fishing effort will be assigned to the (water) cells of the base map in proportion to their fishable biomass. Thus, for example, fishing effort will tend to concentrate at the edges of protected areas one reason, incidentally, why these edges should be as short as possible. 
     60In the simple case that all exploited group have the same economic value (default = 1 monetary unit per tonne), and that all cells require the same sailing cost (default), fishing effort will be assigned to the (water) cells of the base map in proportion to their fishable biomass. Thus, for example, fishing effort will tend to concentrate at the edges of protected areas - one reason, incidentally, why these edges should be as short as possible. 
    6161 
    6262'''Use exact calculations for migratory species'''