Hart et al.: Abundance, distribution, and activity patterns of demersal fishes on Hecate Bank, Oregon 
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"Pygmy rockfish [ 
"Puget Sound rockfish [ 
‘Pygmy-Puget Sound complex [ 
"Unident, juvenile rockfish [ 
"Rosethorn rockfish [ 
"Sharpchin rockfish [ 
Unident adult rockfish [ 
Yellowtail rockfish f 
Greenstriped rockfish j 
Redstripe rockfish [ 
"Harlequin rockfish 
Widow rockfish 
Yelloweye rockfish 
Canary rockfish 
Darkblotched rockfish 
Shortspine thornyhead | | ~ | , 
Dover sole 
Unident, flatfish 
‘Rex sole 
"Unident, sculpin 
"Unident, mottled sculpin 
Threadfin sculpin 
Icelinus spp 
Kelp greenling 
Lingcod 
‘Eptatretus sp. 
"Spotted ratfish 
Sablefish 
Unident, mottled poacher 
‘Unident, ronquil br . - -”r ' T 
Bigfin eelpout | 
1 
33 
=11 
Ha 11 
3*111 
3 * 
□ Day 
O Night 
:a±- 
IV 
=Bh 
10 100 
Number of fish/hectare 
1000 
10,000 
Figure 3 
Total abundance (number of fish per hectare) of fish taxa as determined from the ROV during 
night and daytime transects over all habitat types. Wilcoxon signed-rank test was used to 
compare day and night abundance across stations and primary habitat types (*P<0.05, ** 
PcO.Ol). Arabic numerals indicate the most dominant taxa during day, and Roman numer- 
als indicate the most dominant taxa during night. Error bars indicate standard error of the 
abundance for each taxon. White bars represent day abundance and gray bars represent 
night abundance for the following species groups: Sebastes, Sebastolobus, flatfishes, Cottidae, 
and other fish. Scientific names for all taxa include from top to bottom: pygmy rockfish (S. 
wilsoni ), Puget Sound rockfish (S. emphaeus ), unidentified juvenile rockfish less than 10 cm 
long (Sebastes spp.), rosethorn rockfish (S. helvomaculatus), sharpchin rockfish (S. zacentrus), 
unidentified adult rockfish (Sebastes spp.), yellowtail rockfish (S. flavidus), greenstriped 
rockfish (S. elongatus), redstripe rockfish (S. proriger), harlequin rockfish (S. variegatus), 
widow rockfish (S. entomelas ), yelloweye rockfish (S. ruberrimus), canary rockfish (S. pin- 
niger ), darkblotched rockfish (S. crameri), shortspine thornyhead (S. alascanus ), Dover sole 
(Microstomus pacificus), unidentified flatfish (Pleuronectidae), rex sole (Glyptocephalus zaclii- 
rus ), unidentified sculpin (Cottidae), unidentified mottled sculpin (Cottidae), threadfin sculpin 
(Icelinus filamentosus), Icelinus spp., kelp greenling (Hexagrammos decagrammus ), lingcod 
( Ophiodon elongatus), unidentified hagfishes (Eptatretus spp.), spotted ratfish (Hydrolagus 
colliei), sablefish (Anoplopoma fimbria), unidentified mottled poacher (Agonidae), unidentified 
ronquil (Bathymasteridae), and bigfin eelpout (Lycodes cortezianus) . Alternate shading of the 
background represents general taxonomic groups. 
