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Analyzing Larval Fish Distributions Using Hydrodynamic and Transport Modelling

by John Eric Edinger, (M.ASCE), J.E. Edinger Associates, Inc, Wayne, United States,
Edward M. Buchak, (M.ASCE), J.E. Edinger Associates, Inc, Wayne, United States,
Michael D. McGurk, J.E. Edinger Associates, Inc, Wayne, United States,



Document Type: Proceeding Paper

Part of: Estuarine and Coastal Modeling

Abstract:

Port Moller is a major spawning ground for Pacific herring. Coincident with extensive larval sampling in the estuary, data required for simulating three-dimensional hydrodynamics and transport in the estuary were assembled. The three-dimensional model was used to simulate the transport of weekly larval cohorts. Different larval directed motion hypotheses were tested beginning with the simplest assumption of no directed motion through to larval directed motion into the instantaneous current with larval swimming speed as a function of larval length or age. The latter hypothesis gave the best comparison between the independent model computed results and the observed densities.

Subject Headings: Three-dimensional models | Motion (dynamics) | Hydrodynamics | Fish and fishery management | Estuaries | Mathematical models | Hydrologic models | Alaska | United States

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