Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Harvesting strategies"”.
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Inuit Harvesting Strategies in the Canadian Arctic and Implications for Wildlife Management
The thesis analyses two topics: native harvesting strategies and selected cases of over-exploitation. Its purpose is to assess the credibility of the assumption that hunter-gatherer societies do not have a system of self-regulation. Theoretical explanations and models are described to elicit …
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Optimal harvesting theory for predator-prey metapopulations / Asep K. Supriatna.
… harvest a predator-prey metapopulation. Optimal harvesting strategies are found using dynamic programming and Lagrange multipliers. Rules about harvesting source/sink populations, more/less vulnerable prey subpopulations and more/less efficient predator subpopulations are explored. Strategies for …
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Optimal bioeconomic management of changing marine resources
… 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 …
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Optimal bioeconomic management of changing marine resources
… 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 …
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Growth and simulation modelling studies of rock-lobster (Jasus lalandii) and mussel (Aulacomya ater) populations and their interactions
… with the main purpose of investigating optimal harvesting strategies for i, lalandii. Mussel and lobster single-species models are developed with constant recruitment, as is a lobster model incorporating a linear stock-recruitment relationship. Two models in which lobster growth is influenced by …
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Dynamics and optimal harvesting of prey-predator fishery models in the presence of a toxicant using pontryagin maximum principle
… harvested fishery models using various types of harvesting strategies including the common harvesting, independent harvesting and nonlinear Michaelis-Menten harvesting functions are presented and analyzed. Besides that, most of the models are taking the existence of a toxicant into consideration, …
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A model of a rangeland grazing system within a management procedure approach framework
… in those systems need knowledge of optimal harvesting strategies within defined management strategies. Three models were developed that described the growth of female goats in Paulshoek. The first (basic livestock model) depicted the growth of livestock as a logistic equation with an adult …
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Induced Damping And Its Relationship To Beneficial Energy Harvesting In Dielectric Elastomers With Application To Walking
… coupling and the effects of energy harvesting on the host structure which it is attached to.</p> <p>Since energy harvesting fundamentally involves harnessing the dissipative energy in a system, this research specifically investigates the relationship between biomechanical damping and …
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Experimental and simulation study on the aerodynamic performance of a counter rotating vertical axis wind turbine
… technique could revolutionize wind energy harvesting strategies and would find applications in a wide range of sites that are characterized by low and moderate wind regimes and particularly be useful in the urban environment where turbulence is high.
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The Colloidal Stabilization of Quantum Dots: Towards Manufacturable, Efficient Solution-Processed Solar Cells
… - pave the way for new sustainable energy harvesting strategies based on solution-processed nanomaterials.
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An updated model of the krill-predator dynamics of the Antarctic ecosystem
… together with an historical record of the human harvesting in the region. The abundances and per capita krill consumption of the krill-predators are calculated and used to determine the main krill-predators to be used in the updated model developed. These predators are found to be the blue, fin, …
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Modelling the krill-predator dynamics of the Antarctic ecosystem
… by environmental change. The history of human harvesting in the Antarctic is summarized briefly, and the central role played by krill is emphasized. The background to the hypothesis of a krill surplus in the mid 20th Century is described, and the information, particularly regarding population …
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Modeling the interactions of forest cutting and climate change on the hydrology, biomass and biogeochemistry of a northeastern forest
… regional environmental disturbances, including harvesting and climate change, can lead to integrated and interactive effects on forest ecosystems, altering their structure and function, and therefore long-term sustainability. Understanding both short- and long-term impacts of harvesting …