Management of a Multiple Cohort Fishery: The Hard Clam in Great South Bay
构建了一个多群体渔业模型，通过离散时间控制问题求解最优捕捞与年龄结构，以最大化净收益现值，并应用于纽约长岛大南湾的硬蛤资源，发现稳态最优应只捕捞年轻且价值更高的群体。
Abstract This paper develops a reasonably general multiple cohort model and derives conditions for optimal harvest and age structure based on a discrete time control problem which maximizes the present value of net revenues subject to recruitment and spawning constraints. The model is applied to the hard clam resource in Great South Bay, which is located on Long Island, New York. The steady state optimum calls for exclusive harvesting of the younger, and more valuable, “littleneck” cohorts; leaving the older, and less valuable, “cherrystone” and “chowder” cohorts to specialize in regeneration.