Sökning: "spatial fishery management"

Visar resultat 6 - 10 av 10 avhandlingar innehållade orden spatial fishery management.

1. 6. Genetic and Ecological Consequences of Fish Releases : With Focus on Supportive Breeding of Brown Trout Salmo trutta and Translocation of European Eel Anguilla anguilla

   Författare :Johan Dannewitz; Jacob Höglund; Erik Petersson; Ian Fleming; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; conservation; fishery management; panmixia; genetic variation; effective population size; hatchery selection; Biologi; Biology; Biologi;

   Sammanfattning : Although the practice of releasing fish into the wild is common in the management and conservation of fish populations, the success of release programmes and the potential harmful genetic and ecological effects that may follow are rarely considered. This thesis focuses on genetic and ecological consequences of fish releases, exemplified by supportive breeding of brown trout (Salmo trutta) and translocation of European eel (Anguilla anguilla). LÄS MER

3. 7. Catch and effort from a recreational trolling fishery in a large lake

   Författare :Anders Andersson; John Piccolo; Larry Greenberg; Ian Cowx; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Angler survey; atlantic salmon; brown trout; complemented survey; Lake Vänern; recreational fisheries; fisheries management; recall bias; Biology; Biologi;

   Sammanfattning : Over recent decades recreational fisheries have grown substantially throughout the world. Despite this increase, catches from recreational fisheries have often been ignored in fisheries management, although this is now being remedied. LÄS MER

4. 8. Marine environmental governance and management in Sweden from the 1960s until today : Did the actions suit the needs?

   Författare :Kjell Grip; Sven Bolmqvist; Kjell Larsson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; International programmes on ocean and seas; Baltic Sea; Kattegat-Skagerrak; Marine spatial planning and management; Marine Ecology; marin ekologi;

   Sammanfattning : This thesis investigates how governance and management relevant to the use and protection of the marine environment has emerged in Sweden from the 1960s until today. Focus is on how the modern environmental and nature conservation administration in Sweden developed the legal and organizational frameworks needed for proper management. LÄS MER

5. 9. Managing sea cucumber fisheries and aquaculture : Studies of social-ecological systems in the Western Indian Ocean

   Författare :Hampus Eriksson; Maricela de la Torre-Castro; Juan Carlos Castilla; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sea cucumbers; Bêche-de-mer; Trepang; Echinoderms; Fisheries; Aquaculture; Governance; Trade; Seafood; Tropical seascape; Zanzibar; Mayotte; Western Indian Ocean; marin ekotoxikologi; Marine Ecotoxicology;

   Sammanfattning : Collecting sea cucumbers to supply the high value Chinese dried seafood market is a livelihood activity available to many people in the Western Indian Ocean (WIO), making it an important part of local economies. These fisheries are generally not successfully managed and tropical sea cucumber fisheries show continuing signs of decline. LÄS MER

7. 10. Novelty in social-ecological systems: understanding the past to plan the future

   Författare :Yosr Ammar; Thorsten Blenckner; Susa Niiranen; Magnus Nyström; Johan Eklöf; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Human activities are shaping the Earth system and creating novel properties in the intertwined Social-Ecological Systems (SES). Although novelty is acknowledged in SES theories, the concept of novelty is not well understood, and little mathematical formalization and empirical foundations have been made. LÄS MER