Search for dissertations about: "Fishery stock"

Showing result 1 - 5 of 14 swedish dissertations containing the words Fishery stock.

  2. 1. Fishing the gene pool : Genetic structure, admixture and behavioural complexity in fisheries management

    Author : Kim H. Berndt; Enhet akvatisk ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Fisheries management; Fishery stock; Stock discrimination; Genetic structure; Genetic admixture; Admixture zone; Stock substructure; Phenotypic divergence; Gadus morhua; Salmo trutta;

    Abstract : Prudent management of marine fish resources relies on separation and management of biologically meaningful groups of conspecifics, termed fishery stocks, often depicted as self-sustaining, spatiotemporally separated and demographically independent entities. Such stock discrimination has however proven challenging. READ MORE

  4. 2. Fisheries biology of the edible crab (Cancer pagurus) in the Kattegat and the Skagerrak - implications for sustainable management

    Author : Anette Ungfors; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cancer pagurus; Swedish west coast; sexual maturity; migration; population genetics; stock structure; fishing mortality; stock abundance; management;

    Abstract : The European edible crab (Cancer pagurus) is exploited to a varying degree in its area of distribution. Landings in United Kingdom and Ireland may have peaked around year 2000, reaching 25 000 and 13 000 tonnes, respectively but have slightly decreased since. READ MORE

  5. 3. Essays on Economics of Natural Resource Management and Experiments

    Author : Wisdom Akpalu; Göteborgs universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Optimal taxation; Efficiency; Externality; Dynamic analysis; Firm behaviour; Fishery; Regulatory compliance; Common pool resources; Experiment; Ostracism; Contribution norm; Public goods; Ghana;

    Abstract : This thesis has five self-contained essays. The titles and the abstracts of the various essays are as follows. Paper 1: Natural Resource use Conflict: Gold Mining in Tropical Rainforest in Ghana: Gold is frequently mined in rainforests that can provide either gold or forest benefits, but not both. READ MORE

  6. 4. Some Aspects of Resource and Behavioral Economics

    Author : Daniel Spiro; John Hassler; Sjak Smulders; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Exhaustible Resources; Finite Horizon; Renewable Resources; Forestry; Fishery; Trade; Variety; Social Norms; Conformity; Preference Formation; Economics; nationalekonomi;

    Abstract : This thesis consists of four essays in resource and behavioral economics.Resource Extraction, Capital Accumulation and Time HorizonThe paper shows that relaxing the standard infinite horizon assumption can explain the patterns of exhaustible resource extraction and prices for the last century. READ MORE

  7. 5. The decline of great Arctic charr in Lake Vättern : empirical and theoretical analyses of suggested causes

    Author : Malin Setzer; Tomas Jonsson; Bo Ebenman; Mark C. Emmerson; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Naturvetenskap;

    Abstract : Human activity is affecting species and ecosystems all over the world. In aquatic systems negative trends can be seen for many fish stocks and potential consequences of this, for ecosystem structure and functions, are of particular concern. READ MORE