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Title: I am looking for some help Post by: packersgirl112 on Apr 13, 2011 A predator feeds in an environment with four different types of prey with the following ei , hi , and Lambdai values:
Prey Type ei hi Lambdai A 3 0.5 4 B 8 1.0 2 C 6 2.0 1 D 2 1.0 2 Which set of prey, if taken when encountered, will maximize the predator’s rate of energy intake. I am looking for the equation to figure out this problem. Title: Re: I am looking for some help Post by: duddy on Apr 13, 2011 Sorry what is ei and hi? Can you show me the actual symbol.
Title: Re: I am looking for some help Post by: packersgirl112 on Apr 13, 2011 Well, Ei is the net energetic gain from catching and consuming type-i prey. Hi is handling time for type-i items, and Lambda i is the rate of encounter with prey type i.
Title: Re: I am looking for some help Post by: duddy on Apr 13, 2011 Perhaps this is of use to you:
i = index for prey type • lambdai = rate of encounter with prey of type i (items/time = items/area × area/time) • Ei = net energetic gain from catching and consuming a type-i prey item • hi = handling time for type i items (handle = catch + eat + resume search) • c = energy cost per unit of time while searching Check out the attached file, the formula is there. Tell me if it helps Title: Re: I am looking for some help Post by: packersgirl112 on Apr 13, 2011 Thank you for the paper - But from it, I am confused which equation is the one that I would use in my case.
Title: Re: I am looking for some help Post by: duddy on Apr 13, 2011 Thank you for the paper - But from it, I am confused which equation is the one that I would use in my case. I think it's on page 4, bottom. I've never done the calculation so I'm not totally sure. Title: Re: I am looking for some help Post by: packersgirl112 on Apr 13, 2011 Thank you, I appreciate your help!!
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