Sökning: "Fishery stock"
Visar resultat 1 - 5 av 14 avhandlingar innehållade orden Fishery stock.
1. Fishing the gene pool : Genetic structure, admixture and behavioural complexity in fisheries management
Sammanfattning : 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. LÄS MER
2. Fisheries biology of the edible crab (Cancer pagurus) in the Kattegat and the Skagerrak - implications for sustainable management
Sammanfattning : 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. LÄS MER
3. Essays on Economics of Natural Resource Management and Experiments
Sammanfattning : 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. LÄS MER
4. Some Aspects of Resource and Behavioral Economics
Sammanfattning : 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. LÄS MER
5. The decline of great Arctic charr in Lake Vättern : empirical and theoretical analyses of suggested causes
Sammanfattning : 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. LÄS MER