204 
Fishery Bulletin 117(3) 
Table 6 
Percentage of correct allocations of parasite communities of Pacific sardine (Sardinops sagax ), caught from 2005 
through 2008, to 3 regions of the California Current System based on cross-validation results of canonical analysis 
of principal coordinates. SL=standard length. 
Collection location 
Size category 
(mm SL) 
British 
Columbia 
Washington 
and Oregon 
California 
No. of sample 
groups 
% 
correct 
British Columbia 
<210 
13 
3 
1 
17 
76.5 
210-219 
8 
1 
1 
10 
80.0 
>220 
14 
5 
1 
20 
70.0 
Washington and Oregon 
<210 
5 
15 
14 
34 
44.1 
210-219 
2 
12 
10 
24 
50.0 
>220 
8 
9 
12 
29 
31.0 
California 
<210 
0 
18 
83 
101 
82.2 
210-219 
1 
5 
5 
11 
45.5 
>220 
0 
2 
8 
10 
80.0 
BC WA-OR NorCA CenCA SoCA 
Pronoprymna 
Parahemiurus 
Myosaccium 
Hysterothylacium 
Anisakis 
Fthadinorhynchus 
Figure 3 
Shade plot of abundance of the 7 most abundant taxa of trophically transmit¬ 
ted parasites from Pacific sardine (Sardinops sagax), illustrating differences 
among fish size categories and regions of the California Current where Pacific 
sardine were sampled from 2005 through 2008. Shading intensity increases 
with parasite intensity on the dispersion-weighted scale (numeric values in 
the shade key represent the square-root of intensity). The grayscale shading 
in plot cells are proportional to square-rooted intensity: from white (taxon 
not recovered) to black (maximum intensity). Parasite taxa, displayed on the 
y-axis, are ordered by a cluster analysis of their mutual associations across 
size and region groups. Therefore, taxa exhibiting similar patterns of abun¬ 
dance across the averaged fish groups were clustered on the displayed y-axis 
dendrogram. The labels <200 mm, 200 mm, 210 mm, and 220 mm indicate 
the size category: <200, 200-209, 210-219, and >220 mm in standard length. 
There are 5 regions: Vancouver Island, British Columbia (BC), Canada, Wash¬ 
ington and Oregon (WA-OR), Northern California (NorCA), Central California 
(CenCA), and Southern California (SoCA). 
Lecithaster 
35.9% and 40.5% in the 2 larger size 
categories. This parasite contributed 
85.3% to the parasite communities of 
northern anchovy collected off Grays 
Harbor, and the high contribution of 
this parasite was responsible for the 
high similarity among these northern 
anchovy and the Pacific sardine from 
British Columbia. 
In contrast to the Pacific sardine 
caught off British Columbia, Pacific sar¬ 
dine 210-219 mm SL and >220 mm SL 
caught off Washington and Oregon and 
in the regions off California had parasite 
communities dominated by nematodes. 
Anisakis spp. contributed over 50% to 
the parasite communities in both size 
categories of large Pacific sardine in all 
regions south of British Columbia. The 
only exception was that Pacific sardine 
210-219 mm SL from Southern Califor¬ 
nia were dominated by the nematode 
Hysterothylacium sp. (51.5% contribu¬ 
tion) and the trematode M. ecaude 
(48.4% contribution). 
The parasite communities from small 
(<210 mm SL) Pacific sardine from Wash¬ 
ington and Oregon and northern anchovy 
collected off Willapa Bay were also dom¬ 
inated by Hysterothylacium sp. (44.5% 
and 62.6% contribution, respectively). In 
contrast, the small Pacific sardine col¬ 
lected off all regions of California were 
dominated by M. ecaude. The one excep¬ 
tion was that Pacific sardine <210 mm 
SL from Southern California were dom¬ 
inated by another trematode, P. merus 
(63.2% contribution). The high abundance 
