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Fishery Bulletin 116(3-4) 
(/) 
o 
o 
o 
o 
o 
Q) 
Cl 
UJ 
Z) 
CL 
Year 
Mahi mahi 
Skipjack 
Yellowfin 
Striped marlin 
1995 2005 2015 1995 2005 2015 1995 2005 2015 
10 20 10 
o 
o 
_c 
o 
o 
o 
Q2 
uM 
1995 2005 2015 1995 2005 2015 1995 2005 2015 
10 20 10 
1995 2005 2015 1995 2005 2015 1995 2005 2015 
1995 2005 2015 1995 2005 2015 1995 2005 2015 1995 2005 2015 1995 2005 2015 1995 2005 2015 
Year 
Figure 3 
(A) Annual catch per unit of effort (CPUE) for bigeye tuna ( Thunnus obesus\ black lines) and long- 
nose lancetfish ( Alepisaurus ferox; gray line) for the Hawaii-based longline fishery from 1995 through 
2015. The CPUE for bigeye tuna was calculated from both logbook records (solid black line), which 
are complete through 2015, and observer records (dashed black line), which are complete through 
2014. The CPUE of longnose lancetfish was calculated from observer records. (B) Quarterly and re¬ 
gional CPUE, based on observer data, of bigeye tuna; longnose lancetfish; dolphinfish (Coryphaena 
hippurus), also known as mahi mahi; skipjack tuna ( Katsuwonus pelamis ); yellowfin tuna (Thunnus 
alhacares ); and striped marlin ( Kajikia audax ). Note that the scales of the y-axes vary by species. 
300-425 m), and shallowest in the NE region (depth: 
200-350 m). 
Across the CW and NW regions, as well as much of 
the NE region, the depth of the oxygen-concentration 
threshold (1.0 mL/L) for bigeye tuna was below 500 m. 
In the SW region, this threshold was shallowest along 
10°N (depth: 100-200 m) and progressed to depths be¬ 
low 500 m at the meridional extremes of the region. 
The oxygen-concentration threshold for bigeye tuna 
was shallowest in the SE region, generally above 500 
m and above 100 m along 10°N (Fig. IB). 
Temporal variability Across all grid cells where fishing 
occurred at some point during the time series, the me¬ 
dian depth of preferred thermal habitat for bigeye tuna 
shoaled at a rate of 0.55-0.71 m/year, or by 12-15 m 
