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• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: biophysical models; individual-based models; recruitment; spawning. Published electronically 14 August 2001; Gulf of Alaska; Theragra chalcogramma; Alaska
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.552.2903; http://icesjms.oxfordjournals.org/content/58/5/1030.full.pdf

ftheoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels. – ICES Journal of Marine Science, 58: 1030–1041. Individual-based modelling (IBM) techniques offer many advantages for spatially explicit modelling of marine fish early life history. However, computationally efficient methods are needed for incorporating spatially explicit circulation and prey dynamics into IBMs. Models of nutrient–phytoplankton–zooplankton (NPZ) dynamics have traditionally been formulated in an Eulerian (fixed spatial grid) framework, as opposed to the pseudo-Lagrangian (individual-following) framework of some IBMs. We describe our recent linkage of three models for the western Gulf of Alaska: (1) a three-dimensional, eddy-resolving, wind- and runoff-driven circula-tion model, (2) a probabilistic IBM of growth and mortality for egg and larval stages of walleye pollock (Theragra chalcogramma), and (3) an Eulerian, stage-structured NPZ model which specifies production of larval pollock prey items. Individual fish in the IBM are tracked through space using daily velocity fields