Hood Canal Steelhead Acoustic Telemetry Studies

12
Hood Canal Steelhead Acoustic Telemetry Studies Barry Berejikian and Skip Tezak NOAA Fisheries Northwest Fisheries Science Center Manchester Research Station

description

Hood Canal Steelhead Acoustic Telemetry Studies. Barry Berejikian and Skip Tezak NOAA Fisheries Northwest Fisheries Science Center Manchester Research Station. Hood Canal steelhead. Historically abundant Chronically depressed since mid-late 80’s - PowerPoint PPT Presentation

Transcript of Hood Canal Steelhead Acoustic Telemetry Studies

Page 1: Hood Canal Steelhead Acoustic Telemetry Studies

Hood Canal Steelhead Acoustic Telemetry Studies

Barry Berejikian and Skip TezakNOAA Fisheries

Northwest Fisheries Science CenterManchester Research Station

Page 2: Hood Canal Steelhead Acoustic Telemetry Studies

Hood Canal steelhead

– Historically abundant

– Chronically depressed since mid-late 80’s

– Some indications of a north-south productivity ‘gradient’

– Limiting factors & potential role of supplementation

Page 3: Hood Canal Steelhead Acoustic Telemetry Studies

The problem

Depressed

Depressed

Depressed

Depressed

Depressed

Unknown

Unknown

Data from http://wdfw.wa.gov/fish/sassi/intro.htm

Page 4: Hood Canal Steelhead Acoustic Telemetry Studies

Can supplementation improve productivity of natural populations?

0

20

40

60

80

100

120

140

160

1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

Nu

mb

er

of

Re

dd

s

Dosewallips R.

Duckabush R.

Hamma Hamma R

Dewatto R

?

Page 5: Hood Canal Steelhead Acoustic Telemetry Studies

Hood Canal Bridge

Hamma Hamma R.

Skokomish R.

Big Beef Creek

Dewatto R.

Admiralty Inlet

2005 Hood Canal Steelhead Study

•50 Hatchery reared steelhead(Hamma Hamma River)

•Weight: 48.9 – 129 g

•Length 173-233 mm (FL)

•V8 6L Tags provided and implanted by POST

•Tagged: 5/13/05•Released: 5/23/05

Page 6: Hood Canal Steelhead Acoustic Telemetry Studies

2005 Results Summary

Receiver locations

Complete ‘listening

line’

No. fish detected (% of released)

Min.

survival

Mean (±s.d.) travel time since

release (d)

Hamma Estuary No 36 (72%) 41 (84%) 3.30 (±5.23)

N. Hood Canal No 19 (38%) 22 (44%) 12.4 (± 9.9)

Strait of Georgia Yes 0 (0%) --

Strait of Juan de Fuca Yes 12 (24%) 12 (24%) 17.4 (±10.4)

Page 7: Hood Canal Steelhead Acoustic Telemetry Studies

2005 Hood Canal Steelhead Study

Hood Canal Bridge

Hamma Hamma R.

Skokomish R.

Big Beef Creek

Dewatto R.

Admiralty Inlet

4

13

31

5

15

N

05

1015202530

<0

.5

0.5

-1.0

1.0

-1.5

1.5

-2.0

2.0

-2.5

2.5

-3.0

3.0

-3.5

3.5

-4.0

4.0

-4.5

4.5

-5.0

5.0

<

Days

Fre

qu

en

cy Estuarine Residence

Page 8: Hood Canal Steelhead Acoustic Telemetry Studies

Travel time

4.6 d (0.8 d)1.2 – 2.0 blps

12.8 d (10.7 d)0.1 - 0.5 blps

Page 9: Hood Canal Steelhead Acoustic Telemetry Studies

Migratory pathway

Page 10: Hood Canal Steelhead Acoustic Telemetry Studies

2006 Hood Canal Steelhead Study (Proposed)

• H01: Hood Canal steelhead populations do not differ in early marine survival (river mouth to north end of Hood Canal, and Hood Canal to Straits of Juan de Fuca and Georgia).

• H02: Hood Canal steelhead populations do not show a preference for nearshore vs. open water migration routes through Hood Canal.

• H03: Steelhead individuals and populations inhabiting the nearshore environment spend a similar amount of time in eelgrass habitat and adjacent non-eelgrass habitats.

• H04: Individual steelhead characteristics: outmigration timing, length, weight, and condition factor do not affect rate of migration, habitat use, or stage-specific survival.

Page 11: Hood Canal Steelhead Acoustic Telemetry Studies

2006 Hood Canal Steelhead Study Design

Hood Canal Bridge

Hamma Hamma R.

Skokomish R.

Big Beef Creek

Dewatto R.

Admiralty Inlet•Three populations (Hamma

Hamma R., Skokomish R., Big Beef Creek)

•50 Wild smolts per population

•V9 Vemco Tags

•Two complete listening lines (Hood Canal Bridge and mid-Canal)

Page 12: Hood Canal Steelhead Acoustic Telemetry Studies

Collaborators

• Army Corps of Engineers • Hood Canal Coordinating Council • Hood Canal Salmon Enhancement Group• Jamestown S’Klallam Tribe• Kintama Research Corp./POST• Long Live the Kings• Northwest Fisheries Science Center • Point No Point Treaty Council • Skokomish Tribe • Washington Department of Fish and Wildlife • University of Washington