The Age
Structured Projection Model (AGEPRO)
is an age-structured projection model. It was designed to
evaluate the likely population consequences of complex harvest
scenarios under alternative hypotheses about the stock-recruitment
relationship. Uncertainty in initial population size at age
is incorporated into the model.
AGEPRO
interfaces directly with VPA/ADAPT.
It can use bootstrapped
estimates of population size or fishing mortality rates derived from
any age-structured model. AGEPRO uses Monte Carlo
simulation to evaluate probabilities of achieving targets for fishing
mortality or stock size and the expected age structure of landings and
the population.
The calculation engine is written in FORTRAN by Dr. Jon
Brodziak of NMFS Pacific Islands Fisheries Science Center with
contributions
by Dr. Paul Rago, NMFS NEFSC and others. The calculation
engine and graphical interface have been
entirely rewritten as discrete modules.
Compatibility Notes
Users must re-run older versions of the VPA model to create
bootstrap files
compatible with this version of AGEPRO.
AGEPRO input files used with FACT will be converted to the new
input format. Bootstrap files from FACT are not
compatible with this version of AGEPRO.
Brodziak, J. and P. Rago. Unpublished
manuscript 1994. A general approach for short-term stochastic
projections in age-structured fisheries assessment models. Population
Dynamics Branch. Northeast Fisheries Science Center. Woods Hole,
Massachusetts, 02543.
Brodziak, J., P. Rago, and R. Conser.
1998. A general approach for making short-term stochastic projections
from an age-structured fisheries assessment model. In F. Funk, T. Quinn
II, J. Heifetz, J. Ianelli, J. Powers, J. Schweigert, P. Sullivan, and
C.-I. Zhang (Eds.), Proceedings of the International Symposium on
Fishery Stock Assessment Models for the 21st Century. Alaska Sea Grant
College Program, Univ. of Alaska, Fairbanks.
Age
Structured Projection
Model