Fig 11. Contrast in risk to conservation species biomass (top) and sustainability of the principal fishery (bottom).
Conservation species—common skate and cuckoo ray). Principal fishery—demersal trawl and seine fleet. Low effort is defined as ≤ 10% of fishing effort in 1990) between 9 strategies each fishing at Fmsy by 2020. The contrast between bars 1, 2 and 7 shows the change in risk due to change in discard regulation options only as each is safeguarded by HCR Type 4. Bars 3 and 4 contrast the change in risk when the safeguard as applied in column 7, is either removed or altered to HCR Type 1 (See Fig 4). Bars 5 and 8 demonstrate the effect of a management strategy focused on reducing risk to the depletion of cod (‘Cod god’ strategy, see text, using HCR Type 1 and 4 respectively). Bars 6 and 8 demonstrate the effect of a management strategy focused on reducing risk to the depletion of skates and rays (‘Save the rays’ scenarios, see text, using HCR Type 1 and 4 respectively).