Changes between Version 1 and Version 2 of EwEugEffectsOfPbZandVulnerabilityForTimeSeriesFitting


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Timestamp:
2010-01-30 19:49:54 (9 years ago)
Author:
varunr
Comment:

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  • EwEugEffectsOfPbZandVulnerabilityForTimeSeriesFitting

    v1 v2  
    77For illustration the panels E and F are included in See Figure 3.10. Biomass over time (lines) for ‘large piscivores’ in the Gulf of Thailand. ''P/B'' is the production/biomass ratio (equals ''Z'', the total mortality) for the group, while v is the vulnerability setting describing how the group interacts with each of its prey groups.  Dots represent CPUE from surveys." to show the effect of using a high vulnerability (v=100) for the interactions between the large piscivores and each of its prey groups. It is apparent that this does not result in any improvement in fit between model and CPUE, but in fact in the opposite. The best fit in the example is thus obtained using the parameter settings of panel D. 
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    9 ../Resources/Images/02000031.jpg 
     9[[Image(wiki:EwEugImages:02000031.jpg)]] 
    1010 
    1111'''Figure 3.9''' The solid line shows the predicted mortality calculated as Z ·B, and the dotted line the population growth estimated as a function of the consumption. The area between the lines can be considered ‘surplus production’. 
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    13 ../Resources/Images/03000032.png 
     13[[Image(wiki:EwEugImages:03000032.png)]] 
    1414 
    1515'''Figure 3.10''' Biomass over time (lines) for ‘large piscivores’ in the Gulf of Thailand. P/B is the production/biomass ratio (equals ''Z'', the total mortality) for the group, while v is the vulnerability setting describing how the group interacts with each of its prey groups.  Dots represent CPUE from surveys.