Changes between Version 2 and Version 3 of EwEugUsingEcosimToStudyCompensationInRecruitmentRelationships
- Timestamp:
- 2010-01-30 20:11:16 (15 years ago)
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EwEugUsingEcosimToStudyCompensationInRecruitmentRelationships
v2 v3 6 6 When Ecosim users create multi-stanza dynamics, they need to be careful in setting model parameters that define/create compensatory effects. This begins with the Ecopath input parameters; in order for the juvenile dynamics to Figure compensatory mortality changes, at least two conditions are needed or helpful: 7 7 8 * the juvenile group(s) must have relatively high ''P/B'', i.e. high total mortality rate (see ![wik:EwEugEditMultiStanzaGroups Edit multi-stanza groups]);[[BR]]8 * the juvenile group(s) must have relatively high ''P/B'', i.e. high total mortality rate (see [wiki:EwEugEditMultiStanzaGroups Edit multi-stanza groups]);[[BR]] 9 9 * the juvenile group(s) must have either relatively high EE (so that most mortality is accounted for as predation effects within the model) or else the user must specify a high (near 1.0) value in the Ecosim [[Group info.htm|Group info]] form entry for the juvenile group’s ‘Proportion of other mortality sensitive to changes in feeding time’ column. 10 11 12 10 13 11 Compensatory effects can be increased (the recruitment relationship is flat over a wider range of adult stock sizes, with a steeper slope of recruitment curve near the origin) by:
