Updated 2020 horse mackerel data and assessment model description

This document details the data available for the 2020 horse mackerel assessment.<div><br><div><b>Absolute Abundance indices</b>: Spring survey (9 years) covering 1986-2016 Autumn survey (22 years) covering 1988-2019</div><div><b>Midwater CPUE (Dessert Diamond):</b> 2003-2019</div><div><b>Dual rights CPUE</b>: 2007-2018</div><div><br></div><div><b>Catches</b>: Demersal, midwater and pelagic for 1949 -2019. Note that only the pelagic catches in entirety are available. DEFF provided complete Desert Diamond catches for 2019 which are 32.3% smaller than those for 2018. The demersal and midwater catches for 2019 were thus assumed to also be 32.3% larger than the 2018 values. <br></div></div>