Changes between Version 6 and Version 7 of EwEugForagingTimeAndPredationRisk


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Timestamp:
2010-01-28 16:19:50 (9 years ago)
Author:
varunr
Comment:

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  • EwEugForagingTimeAndPredationRisk

    v6 v7  
    77For convenience in estimating the ''a'',,''ij'',, and ''v’'',,''ij'',, parameters, we scale ''T'',,''it'',, so that ''T'',,''i0'',, = 1, and ''v’,,I j,,''= ''v'',,''ij'',,. Using these scaling conventions, the key issue then becomes how to functionally relate T,,it,, to food intake rate ''c'',,''it'',, so as to represent the hypothesis that animals with lots of food available will simply spend less time foraging, rather than increase food intake rates. 
    88 
    9 In Ecosim a simple functional form for ''T''''it'' is implemented that will result in near constant feeding rates, but changing time at risk to predation, in situations where rate of effective search ''a'',,''ji'',, is the main factor limiting food consumption rather than prey behaviour as measured by ''v'',,''ji'',,. This is implemented in form of the relationship: 
     9In Ecosim a simple functional form for ''T'''''it'' is implemented that will result in near constant feeding rates, but changing time at risk to predation, in situations where rate of effective search ''a'',,''ji'',, is the main factor limiting food consumption rather than prey behaviour as measured by ''v'',,''ji'',,. This is implemented in form of the relationship: 
    1010 
    1111[[Image(wiki:EwEugImages:0800002A.png)]] ''' Eq. 65'''