Optimal bioeconomic management of changing marine resources
Citable URI
https://hdl.handle.net/1912/8412DOI
10.1575/1912/8412Abstract
Marine populations are increasingly subjected to changing conditions whether through harvest
or through broad-scale habitat change. Historically, few models have accounted for
such trends over time, and even fewer have been used to study how trends affect optimal
harvests.
I developed and analyzed several models that explore, first, endogenous change caused
by harvest and, second, exogenous change from factors (such as rising ocean temperatures)
outside harvesters' control. In these models, I characterized the profit{or yield{maximizing
strategy when harvesting damages habitat in a multispecies fishery, when harvest creates a
selective pressure on dispersal, and when rising temperatures cause changes in vital rates.
I explore this last case in both deterministic and stochastic environments, and also allow
the harvester to learn about unknown parameters of the stock recruitment model while
harvesting. I also develop an unambiguous definition of and describe a statistical test for a
shift in a species' spatial distribution.
My results demonstrate that optimal harvesting strategies in a changing environment
differ in important ways from optimal strategies in a constant environment.
Description
Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 2016
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Suggested Citation
Thesis: Moberg, Emily A., "Optimal bioeconomic management of changing marine resources", 2016-09, DOI:10.1575/1912/8412, https://hdl.handle.net/1912/8412Related items
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