Spatial closure cost-benefit optimisation.

<p>Comparison of current and chosen example optimised spatial closures in a) the NW Challenger Plateau and b) the Northern Louisville Ridge fishing areas, assuming closure of 40% of the blocks in each fishing area and objectives of achieving at least 75% of the range in average habitat suitability, and retaining at least 75% of total historical catch, in each fishing area. The optimised scenarios shown use all-depths discounted habitat suitability, and are those marked with the blue dashed lines on the cost : benefit trade-off curves in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0082273#pone-0082273-g009" target="_blank">Figure 9</a>. Dashed line blocks are those deleted from the original trawl footprint after correction of erroneous trawl tow records. The current management approach includes blocks that are open to fishing, but within which a move-on rule is applied (Penney <i>et al</i>. 2009). The optimised closures shown do not include a separate move-on management category.