Suggested Bibliographic Reference: Challenging New Frontiers in the Global Seafood Sector: Proceedings of the Eighteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, July 11-15, 2016. Compiled by Stefani J. Evers and Ann L. Shriver. International Institute of Fisheries Economics and Trade (IIFET), Corvallis, 2016.
Proceedings of the Eighteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, held July 11-15, 2016 at Aberdeen Exhibition and Conference Center (AECC), Aberdeen, Scotland, UK.
The spatio-temporal overlap of morphologically undistinguishable weak and healthy stocks is a major concern for the Pacific Northwest troll Chinook salmon fishery. Regular fishery closures have led to major financial losses calling for alternative regulatory measures. One approach for such complex and pressing socio-ecological challenges is the transition towards transdisciplinary research spanning disciplinary boundaries. This study combines natural and human sciences with stakeholder participation. Based on a unique genetic dataset, fine-scale patterns of fishing effort, stock distributions and spatial stock overlaps were assessed. Two hot spots of weak Klamath Chinook in the Oregon coast regions were identified and related to the topography. This knowledge was used to develop a simple bioeconomic model to evaluate costs and benefits of re-allocating effort to avoid bycatch of the weak stock. The model is a dynamic, spatially-explicit feedback model, composed of sub-modules, running on a monthly basis. A status quo and an alternative scenario of a 50% cut of Klamath catch were tested. The scenarios show that effort re-allocation can lead to reduction in Klamath catch and increasing net profit but outcomes depend on the distance from the home ports to the new fishing area. The output of the model at its current stage should be regarded strategically, providing a qualitative understanding of the types of best strategies. Despite some challenges in transdisciplinarity discussed in this study and the present limitations to incorporate fine-scale changes of Chinook salmon stock distributions in management regulations, this is the direction that fishery management needs to be heading.