304 
Fishery Bulletin 11 7(4) 
128°W 
124°W 
120°W 
116°W 
112°W 
1000 kilomeTer 
Washington 
Little Goose Dam 
Lower Granite Dam 
13 John Day Daro| 
4 Columbia River 
Tillamcpo] 
Idaho 
^ Stranding location 
• Hatchery 
Q Dam 
A City or town 
PSU 12-06-22 Pp 
Arch Cape 
128°W 
124°W 
120°W 
I 
116°W 
112°W 
PSU 14-05-19A Pp 
Long Beach Peninsula 
Montana 
PSU 12-08-22 Pp 
Long Beach Peninsula 
Pacific Ocean 
Oregon 
California 
Wyoming 
Nevada 
Utah 
128 
250 
500 kilometers 
H 
Alberta 
British Columbia 
Figure 1 
Map of the Columbia River Basin (light and dark gray areas) in the Pacific Northwest where juvenile Chinook salmon 
(Oncorhynchus tshawytscha) were tagged with passive integrated transponder (PIT) tags and coded wire tags and 
released in 2012 and where 2 juvenile steelhead (O. mykiss ) were tagged with PIT tags and released in 2012 (n=l) 
and 2013 (n=l). Tags were recovered from 3 harbor porpoises (Phocoena phocoena) that were stranded in 2012 (n= 2) 
and 2014 (n= 1). All but 2 of the 98 tags came from 1 harbor porpoise (PSU 12-08-22 Pp). Locations where the PIT tags 
were detected along the river system, at the dams (gray diamonds) and at the city of Wauna (black triangle), are also 
shown. The Columbia River Basin is divided into smaller basins in the Regional Mark Information System, and num¬ 
bers on the map indicate the basins where Chinook salmon were released: 1) Clearwater River, Idaho, 2) Cowlitz River, 
Washington, 3) Grand Ronde and Imnaha Rivers and Asotin Creek in Oregon and Washington, 4) Hood River, Oregon, 
5) Lower Snake River, below Clarkston, Washington, 6) Methow and Okanogan Rivers, Washington, 7) Columbia River, 
from Priest Rapids Dam to Grand Coulee in Washington, 8) Sandy River, Oregon, 9) Umatilla River, Oregon, 10) Upper 
Snake River, above Lewiston, Idaho, 11) Wenatchee and Entiat Rivers and Lake Chelan in Washington, 12) Willamette 
River, Oregon, 13) Wind and White Salmon Rivers, Washington, and 14) Youngs Bay and Clatskanie River in Oregon. 
Data sources for base map: Esri, HERE, Garmin, OpenStreetMap contributors, and the GIS user community. 
Although PIT tags and CWTs have been found in dead, 
stranded pinnipeds in our area, which covers the outer 
coast from Tillamook, Oregon, to the Long Beach Penin¬ 
sula, in 10 years of responding to strandings and stom¬ 
ach content analysis of over 150 stomachs, only 2 other 
harbor porpoises were found to have salmonid tags in 
their stomachs. One harbor porpoise, an adult male, had 
1 salmonid tag (PIT tag no. 3D9.1C2DB7C94B) from a 
hatchery winter-run steelhead ( O. mykiss) in his stom¬ 
ach. This harbor porpoise (Fig. 1) became stranded on 
8 June 2012 at Arch Cape, Oregon (45.85530,-123.96366). 
The second harbor porpoise was also an adult male that 
had 1 salmonid tag (PIT tag no. 3D9.1C2DDB82D3) from 
a wild summer-run steelhead in his stomach. This harbor 
porpoise became stranded on 19 May 2014 on the Long 
Beach Peninsula (46.48693, -124.06025). This report 
provides the names of the hatcheries, stock locations, 
release dates, and basins associated with releases of 
tagged Chinook salmon and steelhead for the tags recov¬ 
ered from the harbor porpoises in our area. In addition, 
tag numbers associated with the recovered PIT tags and 
the CWTs are provided so that queries of the online 
