Numbers of potential recreational anglers for the seas, inland waters, and inland fish species of Japan

Nakamura, Tomoyuki

doi:10.2331/suisan.19-00034

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…Harvesting the fish is for recreational purposes in the country in most cases. A recent survey revealed that the fish is the third popular inland fishery resource in Japan (Nakamura 2019(Nakamura -2020. The fish is a diadromous (especially, born in the sea and grow up in an upstream river) having a unique one-year life history.…”

Section: "Non-renewable" Fishery Resource Managementmentioning

confidence: 99%

Mathematical and Computational Approaches for Stochastic Control of River Environment and Ecology: From Fisheries Viewpoint

Yoshioka

2021

Computational Management

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We present a modern stochastic control framework for dynamic optimization of river environment and ecology. We focus on a fisheries problem in Japan, and show several examples of simplified optimal control problems of stochastic differential equations modeling fishery resource dynamics, reservoir water balance dynamics, benthic algae dynamics, and sediment storage dynamics. These problems concern different phenomena with each other, but they all reduce to solving degenerate parabolic or elliptic equations. Optimal controls and value functions of these problems are computed using finite difference schemes. Finally, we present a higher-dimensional problem of controlling a dam-reservoir system using a semi-Lagrangian discretization on sparse grids. Our contribution shows the state-of-art of modeling, analysis, and computation of stochastic control in environmental engineering and science, and related research areas.

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Section: "Non-renewable" Fishery Resource Managementmentioning

confidence: 99%