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Ann,
While I personally haven't used it, AD model builder seems to be a favorite
tool of many of the folks dealing with complex fisheries models. These models
can, and frequently do, include age structure information. The apparent
advantage is in its ability to deal with multiparameter nonlinear optimization
issues. At an Alaska SeaGrant symposium I attended on Fisheries Stock Assessment
Models
(see http://www.uaf.edu/seagrant/Pubs_Videos/pubs/AK-SG-98-01.html ) There were
quite a few presentations given which made use of AD model builder.
Basically AD model builder is a higher level programing language for model
construction, which then creates an underlying C++ code used to estimate the
model parameters and report results. While you don't need to know C++, there is
some programing and you certainly need to know model development. If you have
a need or desire to deal with highly parameterized models - it apparently has an
edge over other modeling platforms in its speed and ability to converge to a
solution.
At one point I came across a listserv for AD model but I'm not sure if it was
very active. You might check with the company itself, Otter Research
(http://otter-rsch.com/) directly to find out more.
Best Regards,
Pete
Ann Browder wrote:
>
> Hi All,
>
> I apologize if this is not the correct list to bring this up. If so
> perhaps someone could point me in the right direction.
>
> I would like to hear from people who have used
> the software AD model builder for fisheries models. Specifically I
> would like to know.
>
> 1.) Is it good for age-structured models?
>
> 2.) Is it difficult to learn?
>
> 3.) What do you need to know about statistics,
> programming etc. to use it.
>
> Thanks,
>
> Ann Browder
>
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--
Peter Hagen, ADF&G email: [log in to unmask]
P.0. Box 25526, phone: 907-465-3499
Juneau AK USA, 99801-5526 Fax: 907-465-2765
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