Cost-Effectiveness of Management Activities Related to the Interaction between the California Sea Lion and the Southern California Shark Gill-Net Fishery.

摘要

The California Department of Fish and Game is presently considering a request to the Secretary of Commerce to regain management authority of the California sea lion because of mortalities and economic loss resulting from interactions with coastal fishermen. Before the request can be submitted various costs concerning State management have to be studied. This thesis addresses the cost and effectiveness of five activities relating to the interaction between the shark drift-gill-net fishery in Southern California and sea lions. The activities discussed are: assessing population levels, assessing incidental take, limiting the use of gill-nets by area and time of year, estimating the loss of fish and gear due to depredation, and estimating the value of an acoustical playback device. Where applicable, the cost and effectiveness of different alternatives within an activity are compared to provide criteria for evaluation. Each activity is examined from an economic perspective of what it might cost the state of California or gill-net fishery if the activity were incorporated into an overall management plan of California sea lions. (Author)