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Fishery Bulletin 11 6(2) 
Abundance-based share (survey data) SH-based share 
Figure 3 
Linear relationships between the availability of suitable habitat and proportional abun¬ 
dances of Atlantic halibut (Hippoglossus hippoglossus), by North Atlantic Fisheries Or¬ 
ganization (NAFO) division, in relation to the 1:1 line which indicates a baseline for 
expected productivity for each NAFO division. (A) The suitable habitat (SH)-based share 
(the proportion of the total suitable habitat available within each NAFO division), ver¬ 
sus abundance-based share (survey data) (the proportion of the total positive survey sets 
within each NAFO division), based on data from trawl surveys conducted from 2001 to 
2013. Unlabeled points (near the x:y axis) are 3L (out) and 5Zc, clustered above the 1:1 
line, and 3L (in), 3N (in), and 30 (out), below the 1:1 line. (B) SH-based share versus 
abundance-based share (landings) (the proportion of the total landings to occur within 
each NAFO division), based on commercial fishery data for 2010-2014. (C) Abundance- 
based share (survey data) versus abundance-based share (landings), based on commercial 
fishery data for 2010-2014. (D) SH-based share versus abundance-based share (landings), 
based on commercial fishery data for 1953-1954 (McCracken, 1958). 
contained the largest SH-based share (Fig. 4A). The 
spatial overlap between landings and high suitability 
values (Fig. 4A) is also supported by the relation be¬ 
tween habitat suitability and commercial landings (see 
histogram [Fig. 4BJ), which shows catch frequencies 
increasing with habitat suitability. To further explore 
this relationship, we performed a linear regression 
that predicted landings as a function of suitable habi¬ 
tat availability. The coefficient of multiple determina¬ 
tion (R 2 ) was 0.68, habitat suitability was significant 
for landings with a level of marginal significance ( P ) of 
