Roughhead grenadier (Macrourus berglax) COSEWIC assessment and status report: chapter 18

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Appendix B - Calculation of area occupied

Area occupied in year t (At) was calculated from the survey data based on the survey design:

where a_k is the area of the stratum k, S is the number of strata sampled, n_k is the number of tows made in stratum k in year t, and Y_jk is the catch in tow j in stratum k in year t.