oceanographical conditions changing and pandalus …...bs Линейный (bs )-100-50 0 50 100 150...

Oceanographical conditions changing andPandalus borealis

redistribution in the northern part Sea ofJapan

Gennady Kantakov/\Sergey BukinSakhalin Research Institute of Fisheries

&Oceanography

Where?

Source: Romanovet al., 2002, XII Intern. Fisheries Oceanography Conference, Svetlogorsk, Russia

Biooceanological SakhNIRO sampling station system, Catch Region, Currents

138.00 139.00 140.00 141.00 142.00 143.0045.00

46.00

47.00

48.00

49.00

50.00

51.00

52.00

Russia

mainland

Sakhalin

Section along 141 meridian, 12 CTD-stations (surface – 500 m) with 0.5 ° step

Cape Slepikovsky (Sakhalin)–Cape Zolotoy (Mainland), 14 CTD-stations (surface – bottom) at 47°15' N (SZ standard line)

Cape Korsakov (Sakhalin) – Cape Surkum (Mainland), 10 CTD-stations at 50° N (KS standard line)

Fisheries zones Western Sakhalin and Primorie

C?

DTL at Tartar Strait, Sea of Japan

-1.50

-1.40

-1.30

-1.20

-1.10

-1.00

-0.90

-0.80

-0.70

-0.60

-0.50

-0.40

-0.30

-0.20

-0.10

0.00

0 м

30 м

50 м

75 м

1998 April Temperature < 0, C.deg distribution by horizons 0, 30, 50 and 75 meters

R/V Dmitry Peskov

SakhNIRO data

P.borealis distribution in kg per sq.mile after SakhNIRO 1996, 2002

140°00' 141°00' 141°00' 142°00' 142°00' 143°00'

46°00'

47°00'

47°00'

48°00'

48°00'

49°00'

49°00'

50°00'

50°00'

51°00'

51°00'

52°00'

52°00'

1

5

10

50

100

250

500

750

1000

1250

кг/кв.км

140°00' 141°00' 141°00' 142°00' 142°00' 143°00'

46°00'

47°00'

47°00'

48°00'

48°00'

49°00'

49°00'

50°00'

50°00'

51°00'

51°00'

52°00'

52°00'

1

5

10

50

100

250

500

750

1000

1250

кг/кв.км

1996 2002

Source: Bukin, in press

What Happen?

200300400500600700800900

100011001200

1996 1998 2000 2002 2004 2006

ЗСПрим

улов

, кг/т

рал

Near Decadal P. borealis CPUE (kg) changing in the Western Sakhalin(ЗС) and Primorie (Прим) fisheries zones // BINOM Company Ltd., SakhNIRO data

Stock Western Sakhalin and Primorieshares temporal dynamics

since 1983

0102030405060708090

100

1983

1985

1991

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004St

ock

Shar

e (%

)

We ste rn Sa kha linPrimorie

Hypothesis & Goal

• Imagine that P. borealis larvae transport by currents and following sedimentation is critical for the phenomena that we’ve obtained regarding CPUE changing at 2 different subzones, where fisheries press is equal

• Testify simultaneous or with time lag CPUE variation and changing oceanographical conditions at Primorie(Primorskoe (Srenk’s or Liman) Current) area and Sakhalin (West-Sakhalin and Tsushima Currents) area as possible P.borealis redistribution cause in the first qualitative sight

Tsushima (N), West-Sakhalin Current (S), Total Geostrophic(T) Transport (Sv) 1995-1999

Разрез Т1

-1.00-0.500.000.501.001.50

8.95

3.96

6.96

8.96

12.96

3.97

6.97

7.97

12.97

3.98

4.98

7.98

12.98

4.99

6.99

8.99

11.99

N

S

T

138.00 139.00 140.00 141.00 142.00 143.0045.00

46.00

47.00

48.00

49.00

50.00

51.00

52.00

2 gentle hints

N

0-200 m layer, La Perouse Project Data, SakhNIRO

T,S Anomalies (deg. C, PSU) Primorie Current, 1998-2005

-2.5-2

-1.5-1

-0.50

0.51

1.52

2.5

1.11.1998

1.2.1999

1.5.1999

1.8.1999

1.11.1999

1.2.2000

1.5.2000

1.8.2000

1.11.2000

1.2.2001

1.5.2001

1.8.2001

1.11.2001

1.2.2002

1.5.2002

1.8.2002

1.11.2002

1.2.2003

1.5.2003

1.8.2003

1.11.2003

1.2.2004

1.5.2004

1.8.2004

1.11.2004

1.2.2005

1.5.2005

1.8.2005

0-1000-20050-100100-200

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

01.11.98

01.02.99

01.05.99

01.08.99

01.11.99

01.02.00

01.05.00

01.08.00

01.11.00

01.02.01

01.05.01

01.08.01

01.11.01

01.02.02

01.05.02

01.08.02

01.11.02

01.02.03

01.05.03

01.08.03

01.11.03

01.02.04

01.05.04

01.08.04

01.11.04

01.02.05

01.05.05

01.08.05

0-100

0-200

50-100

100-200

Temperature

SZ line at mainland

Salinity

T,S Anomalies (deg. C, PSU) Tsushima, West-Sakhalin Currents,

1998-2005

-3.00-2.50-2.00-1.50-1.00-0.500.000.501.001.502.002.50

июн.97

сен.97дек.97мар.98ию

н.98сен.98дек.98мар.99ию







н.05сен.05

0-1000-20050-100100-200

Salinity

SZ line at Sakhalin

Temperature

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

июн.97









н.05сен.05

0-1000-20050-100100-200

Trawl temperature data & routine lines observations: contradictory?

-3.00-2.50-2.00-1.50-1.00-0.500.000.501.001.502.002.50

июн.97









н.05сен.05

0-1000-20050-100100-200

0

0.5

1

1.5

2

2.5

3

3.5

4

1980 1985 1990 1995 2000 2005

t C WS tC Prim

trend WS trend Prim

t C

-2.5-2

-1.5-1

-0.50

0.51

1.52

2.5

1.11.1998

1.2.1999

1.5.1999

1.8.1999

1.11.1999

1.2.2000

1.5.2000

1.8.2000

1.11.2000

1.2.2001

1.5.2001

1.8.2001

1.11.2001

1.2.2002

1.5.2002

1.8.2002

1.11.2002

1.2.2003

1.5.2003

1.8.2003

1.11.2003

1.2.2004

1.5.2004

1.8.2004

1.11.2004

1.2.2005

1.5.2005

1.8.2005

0-1000-20050-100100-200

Salinity 0-200 m layer changing one more time: seem to be important for

the P.borealis redistribution

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

01.11.9801.02.9901.05.9901.08.9901.11.9901.02.0001.05.0001.08.0001.11.0001.02.0101.05.0101.08.0101.11.0101.02.0201.05.0201.08.0201.11.0201.02.0301.05.0301.08.0301.11.0301.02.0401.05.0401.08.0401.11.0401.02.0501.05.0501.08.05

0-100

0-200

50-100

100-200

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

июн.97









н.05сен.05

0-1000-20050-100100-200

SZ at mainland SZ at Sakhalin

Vertical Temperature Distribution at Tartar Strait, April 1998

46.00 47.00 48.00 49.00 50.00 51.00Source: SakhNIRO data, R/V Dmitry Peskov, ichtyoplankton survey

138.00 139.00 140.00 141.00 142.00 143.0045.00

46.00

47.00

48.00

49.00

50.00

51.00

52.00

Tendencies in Geostrophic E-W Currents Transport 2001-2005

-150

-100

-50

0

50

100

150

june 200

1octo

be r 200

1ma y 2

002

a pril 200

3nove

mber 20

03a pril

2004

may 200

5

Es

Ws

Bs

Лине йный (Bs )

-100

-50

0

50

100

150

200

250

300

june 2001 oc tobe r

2001

ma y 2002 a pril 2003 nove mbe r

2003

a pril 2004 ma y 2005

138.00 139.00 140.00 141.00 142.00 143.0045.00

46.00

47.00

48.00

49.00

50.00

51.00

52.00

dBs/dt>0

dBs/dt<0

Differences of din. heights changing between 46-48 30’N (south region) and 48 30’ -51 30’N (northern region) at 141E MT line, ref. level 200 m

Source: SakhNIRO CTD data MT line 2001-2005

Multiyear average sea surface heights, Topex/Poseidon altimetry data (tides subtracted)

October (1993-2002)April,1993-2002 October,1993-2002

Topex/Poseidon Analysis Source: Romanov, Shevchenko 2005

Kiya North

Submooring

2003-2005

No evident A-circulation in Archive CTD data

Source: SakhNIRO data

Kiya Submooring Recovery, May 2003

Kiya-North SubmooringConfirmation A-ring in the Tartar

Strait deepest part >1000m

Period Horizon E* N* U*30.03.2004 - 30.05.2004 37 m 0.86 5.76 -0.3530.03.2003- 30.05.2003 850 m 0.57 1.42 -0.73

*with tides

Conclusions I• Oceanographical conditions in the upper 200 m layer have remarkable

changing coincide with opposite P. borealis CPUE dynamics in the West Sakhalin and Primorie fisheries zones, especially after 2002

• Geostrophic circulation in the southern part of Tartar Strait near Sakhalin twice was outer regarding upper 0-200 m layer – in 1996 and 1998 during 1995-1999 observation period

• No significant trend in the layer temperature data for the 200 msurface below. Meanwhile, clear salinity decreasing is obtained near Sakhalin in order of 0.1 PSU for the period 1998-2005, when P.borealis redistribution is obtained. It’s mean possible gradual weakness of the Tsushima subtropical current near Sakhalin

• Tartar strait E-W circulation index has trend which differs in the south and northern parts, where E component had negative and clearly positive trend respectively

Conclusions II• Submooring Kiya-North confirmed East, North and

Downwelling components at deepest part of Tartar Strait during 2003-2004 observation period detected by T/P data early, but E component became more weaker in recent years due supposed A-circulation moving in the west direction in the deepest part of Tartar Strait

• On the contrary East component is growing in the northern Tartar Strait area according 2001-2005 CTD meridian line observations

• Currents reformation (or perestroika) is very possible reason of the redistribution of the P. borealis in the Tartar Strait, Sea of Japan because few months plankton stage in spring

• The cause of the currents change in Tartar Strait deepest part, Sea of Japan is still unclear

• Our research is continued…for Keeping & Reproduction

• THANK YOU!Sincerely yours, Pandalus borealis

oceanographical conditions changing and pandalus …...bs Линейный (bs )-100-50 0 50 100 150...

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