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  • Using evolutionary economics to explain predator-prey anomalies in the fisheries or explaining micky mouse's ears

    Creator:
    Wilson, James R.
    Abstract:
    The development of several sub-fields of general economics, including those of bounded rationality, institutional economics and the evolutionary economics, has expanded the scope and intensity of the dialogue both within economics, as well as between economists and other scientists. One of the more important preoccupations of early evolutionary economics was...
    Resource Type:
    Research Paper
    Full Text:
    Using evolutionary economics to explain

  • Evolutionary and ecological interactions affecting seaweeds

    Creator:
    Olson, Annette M.
    Abstract:
    The term "interaction" in evolutionary biology and ecology describes the relationships among variables in two classes of causal models. In the first, "interaction" refers to the influence of a single putatively causal variable on a variable of interest. In the second class of models, the term applies when a third...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: Jane Lubchenco The term "interaction" in evolutionary biology and ecology describes

  • A model of trophic evolutionary pathways

    Creator:
    Morris, A. Kimo
    Abstract:
    Calow (1983) realized that differences between parasites and their free-living relatives can be explained by the differences in nutrient richness. I propose a model that is based on Calow's idea which identifies the relative position of different trophic strategies (e.g. predation, grazing, parasitism and others) based on (1) the differences...
    Resource Type:
    Masters Thesis
    Full Text:
    A model of trophic evolutionary pathways AN ABSTRACT OF THE

  • The genus Caenorhabditis : a system for testing evolutionary questions

    Creator:
    Raboin, Michael J.
    Abstract:
    Caenorhabditis elegans is arguably the best understood animal on the planet. Used for over 50 years to study development, we have a vast amount of knowledge of the inner workings of this worm. Our knowledge is incomplete, however, without placing this organism in its evolutionary and ecological context. In this...
    Resource Type:
    Dissertation
    Full Text:
    . Title: The Genus Caenorhabditis : A System for Testing Evolutionary Questions Abstract approved

  • The evolutionary stability of partial migration

    Creator:
    Ohms, Haley A.
    Abstract:
    Natural selection, in its most basic form, is described as a process in which traitsincrease or decrease in frequency depending on their fitness, and only the trait withthe highest fitness will remain in the population. Yet, populations rarely have asingle `optimal' trait. The way natural selection maintains this observed variationwithin...
    Resource Type:
    Dissertation
    Full Text:
    of evolutionary ecology (Fisher 1930). An excel- lent system to investigate the evolution and

  • Multiagent learning for locomotion and coordination in tensegrity robotics

    Creator:
    Iscen, Atil
    Abstract:
    Tensegrity structures are composed of pure compressional elements that are connected via a network of pure tensional elements. The concept of tensegrity promises numerous advantages to the field of robotics. Tensegrity robots are, however, notoriously difficult to control due to their oscillatory nature and nonlinear interaction between the components. Multiagent...
    Resource Type:
    Dissertation
    Full Text:
    - proaches (Reinforcement Learning and Evolutionary Algorithms) to tensegrity robotics problems at different

  • Evolutionary history and speciation of the genus Tragopan

    Creator:
    Islam, Kamal
    Abstract:
    A study of the phyletic relationships among five species of tragopans and an outgroup, the Blood Pheasant (Ithaginis cruentus), was conducted from 1987 to 1991. Biochemical, behavioral, and external morphologic characteristics were compared. A cladistic approach was used to compare the behavioral, biochemical, and external morphologic data collectively, as different...
    Resource Type:
    Dissertation
    Full Text:
    Evolutionary history and speciation of the genus Tragopan

  • Physical and chemical characteristics of the Yaquina Estuary, Oregon

    Creator:
    Callaway, R. J., Specht, David T., and National Health and Environmental Effects Research Laboratory (U.S.). Western Ecology Division. Coastal Ecology Branch
    Abstract:
    "After a brief description of the setting of the Yaquina Estuary, estuarine dynamics and classification, and estuarine chemistry are presented. Then, temperature-salinity relations are reviewed using the Rattray-Officer model in simulating variable distributions reported by Callaway and Specht (1982) and Callaway (1991). Finally, the numerical models DynHyd and WASP are...
    Resource Type:
    Technical Report
    Full Text:
    . Box 57 Corvallis, OR 97339 David 1. Specht, Project Officer Coastal Ecology Branch U.S

  • Investigating Demographic and Evolutionary Factors Important for Fish Reintroduction

    Creator:
    Sard, Nicholas M.
    Abstract:
    Reintroduction programs are used to re-establish species back into their historical habitat. Most reintroduction programs have failed and few papers have evaluated factors that may be important to Pacific salmon. The 158 meter tall Cougar Dam has blocked Chinook salmon (Oncorhynchus tshawytscha) from accessing 40 kilometers of historical spawning and...
    Resource Type:
    Dissertation
    Full Text:
    : Investigating Demographic and Evolutionary Factors Important for Fish Reintroduction Abstract approved

  • Evolutionary relationships and an investigation of sympatric speciation within Limnanthaceae

    Creator:
    Meyers, Stephen C.
    Abstract:
    Limnanthes floccosa ssp. floccosa and L. floccosa ssp. grandiflora are two of five subspecies of Limnanthes floccosa endemic to vernal pools in southern Oregon and northern California. Three seasons of monitoring natural populations have quantified that L. floccosa ssp. grandiflora is always found growing sympatrically with L. floccosa ssp. floccosa...
    Resource Type:
    Dissertation
    Full Text:
    for plant systematic research and the Leslie and Vera Gottlieb research fund in evolutionary biology