Emery et al : Do oil and gas platforms reduce recruitment of Sebastes paucispinis to natural fiabital' 



395 



34,8N- 



34.6- 



34.4- 



34.2- 



34.0- 



10 15 20 25 30 35 



Bin number 



100 

 88 



75 O 



c 



3 



c 



63 Q) 



a 



50 



-38 



25 t. 



13 



— I — 

 20 



40 



— I 1 1 



60 80 100 



Distance (km) 



120 



— I — 

 140 



— I 

 160 



-121 -120.8 -120.6 -120.4W 



Figure 3 



(A) Coverage boundary (indicated by heavy lines around the black square (Platform Irene]) for 1 May-31 August 2002. 

 Numbers and tick marks around boundary identify bins corresponding to .r-axis in panel B. (B) Histogram (gray bars, 

 left-hand scale) and cumulative frequency (bold line, right-hand scale) show fraction of trajectories (in percent) intersect- 

 ing bins around coverage boundary. Panel A shows bin locations. Distance around the coverage boundary (Fig. 2A) in 

 kilometers is also shown (bottom scale). Arrow above histogram shows boundary location nearest Platform Irene. 



curred in bin 3 and about 10% of trajectories crossed 

 the inshore boundary on the 50-m isobath (bins l-5l. 

 The remaining trajectories crossed either the northern 

 (9%) or southern (5%) sides of the coverage boundary. 

 In 2002 the radars covered a substantially larger area 

 (Fig. 3A), including about 50 km of the 50-m isobath, 

 70 km of the 500-m isobath along the offshore bound- 



ary, and a portion of the western entrance of the Santa 

 Barbara Channel. The histogram of coverage bound- 

 ary crossings for May-August 2002 also exhibited two 

 peaks, one between bins 9-11 along the 50-m isobath 

 and a second in bin 31 along the offshore side of the cov- 

 erage boundary (Fig 3B). In 2002, 24% of trajectories 

 crossed the 50-m isobath (bins 1-13), 69% crossed the 



