Electronic Recovery of PIT tags From Piscivorous Bird Colonies

Brad A. Ryan, Benjamin P. Sandford,

April Cameron, and Gene Matthews

>12 Million CRB Salmonids PIT tagged

3D9.1BF0F4058C

In the beginning-Visual recovery

OSU>2,500 Tags

Sand Flea 2000

1,119 Tags

Ed Nunnallee-400Khz

1998 Rice Island

47,057 Tags

1999

Hand Scanners

10,533 Tags

Lower Granite Dam

Oregon

Washington

IdahoSnake River

Mid-Columbia River

McNary Dam

John Day Dam

The Dalles DamBonneville Dam

Columbia River

Washington

Snake RiverColumbia River

Mid-Columbia River>131,000 -400 Khz Tags

East SandRice

92,314-Tags

Pilings

1,123-Tags

Little Memaloose & Miller

5,164-Tags

Three Mile Canyon

9,583-Tags

Crescent

21,492-Tags

Richland & Island 18

2,284-Tags

Conversion To 134.2 Khz ISO Tags

ISO-Antenna ISO-Electronics

>170,000-ISO Tags

Off The Shelf ISO Scanners

134.2 Khz

>55,000-ISO Tags

Lower Granite Dam

Oregon

Washington

IdahoSnake River

Mid-Columbia River

McNary Dam

John Day Dam

The Dalles DamBonneville Dam

Columbia River

Washington

Snake RiverColumbia River

Mid-Columbia River>225,000 -134.2 Khz Tags

East SandRice

>150,000 Tags

Pilings

>200-Tags

Little Memaloose & Miller

>10,700-Tags

Three Mile Canyon

>3,200-Tags

Richland & Island 18

>5,600-Tags

Pot Holes

>4,900-Tags

Crescent

>50,200-Tags

Foundation

Badger

>500-Tags

>7,900-Tags

Species Vulnerability

Photo by BAR

Lower Granite Dam

Oregon

Washington

IdahoSnake River

Mid-Columbia River

McNary Dam

John Day Dam

The Dalles DamBonneville Dam

Columbia River

Oregon

Washington

Snake River

Columbia River

Mid-Columbia River

Columbia River Estuary

Bonneville Dam

Avian Predation Spring chinook, Fall chinook, and Steelhead

Bon/Estuary Colonies

2.93.7

6.6

2.51.7

3.83.1

1.5

10.6

12.9

16.415.3

0

5

10

15

20

1999 2000 2001 2002

Migration Year

Det

ectio

n (%

)

S/S chinook

Fall chinook

Steelhead

Lower Granite Dam

Oregon

Washington

IdahoSnake River

Mid-Columbia River

McNary Dam

John Day Dam

The Dalles DamBonneville Dam

Columbia River

Oregon

Washington

Snake River

Columbia River

Mid-Columbia River

East Sand Island

Bonneville Dam

Estuarine Releases

Avian Predation on Estuarine Spring chinook, Fall chinook, and Steelhead

3.7

5.9

15.914.7

8.46.8

0

5

10

15

20

25

2001 2002

Migration Year

Det

ectio

n (%

)

Spring chinook

Fall chinook

Steelhead

Rearing History VulnerabilityHatchery vs. Wild

Photo by RDL

Hatchery vs WildRelative Vulnerability to TernsBon/East Is. --S/S chinook sal.

0.3

2.7

5.9

1.9

0.31.0

4.6

0.7

0

5

10

1999 2000 2001 2002

Migration Year

Det

ectio

n (%

)

Hatchery; n=3,497

Wild; n=252

Hatchery vs WildRelative Vulnerability to Terns

Low Mo./Crescent Is. --S/S chinook sal.

0.7 0.4

4.4

1.1 0.90.7 0.4

3.2

0.9 1.2

0

5

10

1999 2000 2001 2002 2003

Migration Year

Det

ectio

n (%

)

Hatchery; n=3,714

Wild; n=743

Hatchery vs WildRelative Vulnerability to Terns

Bon/East Is. --Steelhead

0.6

9.6

14.2 13.5

0.4

6.8

15.714.3

0

5

10

15

20

1999 2000 2001 2002

Migration Year

Det

ecti

on (

%)

Hatchery; n=1,897

Wild; n=1,294

*

Hatchery vs WildRelative Vulnerability to Terns

Low Mo./Crescent Is. --Steelhead

4.4

2.5

12.3

7.0

3.43.01.3

14.0

7.6

4.3

0

5

10

15

20

1999 2000 2001 2002 2003

Migration Year

Det

ectio

n (%

)

Hatchery

Wild

Additional Analysis

• Transportation– Barge vs. In-river

• Multiple Bypass

• Survival– ?

Other Applications

• Under Water

– Crescent Island Bay >500

• Race Ways

– Recovery of discarded tags

• Inside of Predators

– Detection of salmonid PIT tags in Caspian tern chicks.

Questions