Abstract


¬CONSERVING SMALL-SCALE FISHERIES UNDER UNCERTAINTY IN SELF-RECRUITMENT USING SIZE LIMITS

A major challenge in managing for conservation and fishery sustainability at small spatial scales is the unknown amount of external versus self-recruitment, and the applicability of fishery management tools under such conditions. We tested the application of minimum size limits by using empirical data we gathered to create a mixed-recruitment, size-structured integral projection model and simulated harvest to determine the size limit resulting in both increased population abundance and maximum annual harvest for self-recruitment amounts ranging from 0-100% of total recruitment. Over a wide range of life histories, a single 'robust' size limit resulted in increased population abundance and therefore sustainable harvest within 10% of the maximum harvest for every possible recruitment mix. In addition to allowing individuals to reproduce before being harvested, minimum size limits can also be used to rebuild population abundance and maximize sustained fishery harvest when managers have no knowledge about recruitment sources.

Authors

Yau, A. J., NOAA Fisheries, Pacific Islands Fisheries Science Center, USA, annie.yau@noaa.gov

Lenihan, H. S., Bren School of Environmental Science and Management, University of California, Santa Barbara, USA, lenihan@bren.ucsb.edu

Kendall, B. E., Bren School of Environmental Science and Management, University of California, Santa Barbara, USA, kendall@bren.ucsb.edu

Details

Oral presentation

Session #:21
Date: 06/23/2016
Time: 15:30
Location: 310 THEATER

Presentation is given by student: No