Information from archival tags on salmon in the bering sea 2003 2006
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Information from Archival Tags on Salmon in the Bering Sea, 2003-2006. NPRB Project R0204 NPAFC Salmon Tagging PI: Jack Helle Vladimir Fedorenko. Robert Walker, Kate Myers, Nancy Davis School of Aquatic and Fishery Sciences University of Washington, USA

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Information from Archival Tags on Salmon in the Bering Sea, 2003-2006

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Information from archival tags on salmon in the bering sea 2003 2006

Information from Archival Tags on Salmon in the Bering Sea, 2003-2006

NPRB Project R0204

NPAFC Salmon Tagging

PI: Jack Helle

Vladimir Fedorenko

Robert Walker, Kate Myers, Nancy Davis

School of Aquatic and Fishery Sciences

University of Washington, USA

Jack Helle, Jim Murphy

NOAA Fisheries Auke Bay Lab

Shigehiko Urawa

National Salmon Resources Center, Japan

& NPAFC

Olga Temnykh, Vladimir Sviridov

TINRO-Centre, Russia

Vladimir Fedorenko

North Pacific Anadromous Fish Commission


Information from archival tags on salmon in the bering sea 2003 2006

Acknowledgments

  • North Pacific Research Board (NPRB)

  • North Pacific Anadromous Fish Commission (NPAFC)

  • NOAA/National Marine Fisheries Service, AFSC/ABL

  • Fisheries Research Agency; National Salmon Resources Center; HNFRI (Japan)

  • Pacific Scientific Research Fisheries Centre (TINRO), KamchatNIRO (Russia)

  • Department of Fisheries and Oceans (Canada)


Information from archival tags on salmon in the bering sea 2003 2006

BASIS

“The Bering-Aleutian Salmon International Survey (BASIS) is NPAFC's coordinated program of cooperative research on Pacific salmon in the Bering Sea that was designed to clarify the mechanisms of biological response by salmon to the conditions caused by climate changes.

• Seasonal-specific migration patterns of salmon and their relation to the Bering Sea ecosystem

• Key biological, climatic, and oceanographic factors affecting long-term changes in Bering Sea food production and salmon growth rates”

www.npafc.org

R0303 - NPAFC Cooperative Research:

Use of genetic stock identification to determine the distribution, migration, early marine survival, and relative stock abundance of sockeye and chum salmon in the Bering Sea


Tag types

Tag Types:

  • Lotek LTD_1100 (temperature,depth)

  • AlphaMach iBLite, iBKrill (temperature)

  • StarOddi DST CTD (salinity,temperature, depth)

  • Lotek LTD_2400 (temperature,depth, light/geolocation)


Live box for trawl

Live Box for Trawl


Information from archival tags on salmon in the bering sea 2003 2006

= Wakatake maru = Kaiyo maru

= Miller Freeman

Offshore archival tagging cruise tracks, 2003-2006


Information from archival tags on salmon in the bering sea 2003 2006

NPAFC/NPRB DST releases and recoveries,

2003-2006

recovery rates

Overall:

7.8%

Total releases:

637

Total recoveries:

50

(Overall INPFC/NPAFC disk tag recovery rate, 1955-2000: 3.8%)


Releases and recoveries by species

Releases and Recoveries by Species

recovery rates


Information from archival tags on salmon in the bering sea 2003 2006

Recoveries of NPAFC / NPRB DSTs released in the Bering Sea, North Pacific,

and Gulf of Alaska

1

3

6

1

4

1

1

1

2

1

1

1

2

2

1

1

21


Key to data charts

diel behavior pattern

recuperation period

Key to data charts

Depth

Temperature


Temperatures can help indicate changes in water mass

Depths relatively constant;

Fish may be choosing depth range, not temperature

Temperatures can help indicate changes in water mass


Yukon chinook 2 year data record

Yukon Chinook - 2 Year Data Record


Night near surface day few large vertical movements

Night: near surface Day: few, large vertical movements


Information from archival tags on salmon in the bering sea 2003 2006

Night: 25 m below surface Day: small vertical movements, comes to the surface


Information from archival tags on salmon in the bering sea 2003 2006

Night: 25 m below surface Day: 100 m below surface


Comparison of winters

Comparison of Winters


Deep dive periods after winter

Deep Dive Periods after Winter

April-May 2003

February-May 2004


Proportion of chinook by catch ebs trawl fishing by season age and depth 1997 1999

Proportion of Chinook By-Catch, EBS Trawl Fishingby season, age, and depth, 1997-1999

40-80% at 50-400 m, slightly deeper Sept-Oct, more older fish in winter, younger in summer-fall


Information from archival tags on salmon in the bering sea 2003 2006

Immature

Maturing

age 1.2

age 1.3

age 1.4


Information from archival tags on salmon in the bering sea 2003 2006

120W

170E

180

170

160

150

140

130

70N

70N

AK

66N

66N

YT

Yukon River

62N

62N

3

6

3

7

3

7

6

7

58N

58N

3

6

7

12

3

2

7

7

3

6

3

2

3

7

2

BC

54N

54N

50N

50N

Yukon River Chinook Salmon

= mature adult (n = 1 CWT)

WA

46N

46N

= immature and maturing in winter

(n=15 CWT)

OR

42N

42N

= immature in summer

(n=10 high seas tags)

38N

38N

Number inside symbol = month that

fish was caught

CA

34N

34N

120W

170E

180

170

160

150

140

130


Sockeye

Sockeye

  • Shallow dives (20-30 m)

  • Weak to moderate diurnal pattern


Bering sea pink salmon

Bering Sea Pink Salmon


Information from archival tags on salmon in the bering sea 2003 2006

  • Strong diurnal pattern

  • May remain deep during day

  • Moderate depth (40-60m)


Information from archival tags on salmon in the bering sea 2003 2006

Coho

  • Diurnal pattern variable

  • Sometimes remains below surface

  • 30-70 m dives, to > 100 m


Maximum and average minimum depths m on data tags

Maximum and Average Minimum Depths (m) on Data Tags


Summary

Summary

  • Generally relatively shallow (to 30-60 m); some deep dives by chum and chinook

  • Species differences

  • Depth ranges often relatively constant while temperature ranges vary; possible selection for depth, not temperature?

  • Note: most data are from maturing fish; Possible changes in behavior with stage of maturity indicated by 1 tag


Suggestions for the future

Suggestions for the Future

  • Tag more immature salmon

  • Tag later in fall, for better chances of recoveries of immature salmon

  • Tag earlier in spring, for better coverage of returning stocks

  • Use geolocation tags


Information from archival tags on salmon in the bering sea 2003 2006

Thank you!

…Keep looking for high seas salmon tags!


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