Annex 3. Presentations to the Task Group 18 July 2017 SC5-Doc10 - - PDF document

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Annex 3. Presentations to the Task Group 18 July 2017 SC5-Doc10 - - PDF document

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18 July 2017 SC5-Doc10 Annex 3. Presentations to the Task Group 18 July 2017 SC5-Doc10 Instituto de Investigacin Pesquera ACOUSTIC DATA OBTAINED FROM A FISHING VESSEL SEARCHING CHILEAN JACK MACKEREL AT THE HIGH SEA OFF SOUTH CENTRAL CHILE

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Annex 3. Presentations to the Task Group

18 July 2017 SC5-Doc10

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ACOUSTIC DATA OBTAINED FROM A FISHING VESSEL SEARCHING CHILEAN JACK MACKEREL AT THE HIGH SEA OFF SOUTH CENTRAL CHILE DURING YEARS 2009 Y 2010

Nicolás Alegría and Aquiles Sepúlveda

Instituto de Investigación Pesquera

18 July 2017 SC5-Doc10

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OBJECTIVES

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

In 2008, managers of the fishing industry of Central-South Chile decided to adapt a fishing vessel as a research platform with the following purpose: To characterize and assess relative abundance of Chilean Jack Mackerel aggregations offshore. To relate fish density with oceanographic features and food component distribution and relative abundance. A fishing vessel from the trawling fishery of Chile (Biomar III) was equipped with a scientific echosounder (Simrad EK-60) and a 38 kHz transducer, sonar and oceanographic equipment. The vessel was operating during two years (2009 and 2010) searching fish for 170 days in year 2009 and 203 days in 2010.

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BBIP BIOMAR III

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

18 July 2017 SC5-Doc10

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INFORMATION ANALYSIS

  • INTEGRATE AND EXPORT

DENSITY

(ton/mn2)

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

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RELATIVE ABUNDANCE ESTIMATES

) , ( ) , ( ) , (

) (

y x y x NASC y x z

i Ton i i

  • )

, ( ) , ( ) , (

) (

y x W y x y x

i i i Ton

  • )

, ( y x Wi

) , ( y x

i

  • j

TS j i

j

f y x

10 /

10 4 ) , (

  • Mean weight (in metric tons) of the species i by haul of

identification at the locality (x,y) Is the average transversal section of acoustic backscattering (in m2) of species i:

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

TS= 20 log(LH) – 68,91 (Lillo et al., 1996)

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RESULTS

SPATIAL DISTRIBUTION

JANUARY 2009 FEBRUARY 2009 APRIL 2009 MARCH 2009 JANUARY 2010 FEBRUARY 2010 APRIL 2010 MARCH 2010

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

18 July 2017 SC5-Doc10

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RESULTS

SPATIAL DISTRIBUTION

Instituto de Investigación Pesquera - INPESCA

MAY 2009 AUGUST 2009 JULY 2009 MAY 2010 AUGUST 2010 JULY 2010 JUNE 2010 18 July 2017 SC5-Doc10

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RESULTS

SPATIAL DISTRIBUTION

SEPTEMBER 2009 NOVEMBER 2009 DECEMBER 2009 SEPTEMBER 2010 NOVEMBER 2010 DECEMBER 2010

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

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RESULTS

Zooplankton

  • T. murphii

RELATIONSHIP BETWEEN FOOD AVAILABILITY AND PRESENCE OF MACKEREL, YEAR 2009

SPATIAL DISTRIBUTION

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

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RESULTS

Zooplankton

  • T. murphii

RELATIONSHIP BETWEEN FOOD AVAILABILITY AND PRESENCE OF MACKEREL, YEAR 2010

SPATIAL DISTRIBUTION

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

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4 3 5 3 2 5 2 1 5 1 5 2 4 6 8 1 1 2 1 4 1 6 1 8

3 3 , 3 3 , 2 3 3 , 4 3 3 , 6 3 3 , 8 3 4 , 3 4 , 2 3 4 , 4 3 4 , 6 3 4 , 8 3 5 , , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 1 ,

Depth [salt water, m] S a l i n i t y [ P S U ] O x y g e n , S B E 4 3 [ m g / l ] / 4 3 5 3 2 5 2 1 5 1 5 2 4 6 8 1 1 2 1 4 1 6 1 8

3 3 , 3 3 , 2 3 3 , 4 3 3 , 6 3 3 , 8 3 4 , 3 4 , 2 3 4 , 4 3 4 , 6 3 4 , 8 3 5 , , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 1 ,

Depth [salt water, m] S a l i n i t y [ P S U ] O x y g e n , S B E 4 3 [ m g / l ] /

0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0

O x y g e n , S B E 4 3 [ m g / l ]

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

4 3 5 3 2 5 2 1 5 1 5

3 3 , 3 3 , 2 3 3 , 4 3 3 , 6 3 3 , 8 3 4 , 3 4 , 2 3 4 , 4 3 4 , 6 3 4 , 8 3 5 , , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 1 ,

Depth [salt water, m] S a l i n i t y [ P S U ] O x y g e n , S B E 4 3 [ m g / l ] / 4 3 5 3 2 5 2 1 5 1 5

3 3 , 3 3 , 2 3 3 , 4 3 3 , 6 3 3 , 8 3 4 , 3 4 , 2 3 4 , 4 3 4 , 6 3 4 , 8 3 5 , , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 1 ,

Depth [salt water, m] S a l i n i t y [ P S U ] O x y g e n , S B E 4 3 [ m g / l ] / 2 4 6 8 1 1 2 1 4 1 6 1 8 400 350 300 250 200 150 100 50

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Salinity [PSU] Oxygen, SBE 43 [mg/l] 3 / 2 4 6 8 1 1 2 1 4 1 6 1 8 400 350 300 250 200 150 100 50

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Salinity [PSU] Oxygen, SBE 43 [mg/l] 3 / 2 4 6 8 10 12 14 16 18 400 350 300 250 200 150 100 50

3 3 , 3 3 , 2 3 3 , 4 3 3 , 6 3 3 , 8 3 4 , 3 4 , 2 3 4 , 4 3 4 , 6 3 4 , 8 3 5 , , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 1 ,

Depth [salt water, m] Salinity [PSU] Oxygen, SBE 43 [mg/l] 2 4 6 8 10 12 14 16 18 400 350 300 250 200 150 100 50

3 3 , 3 3 , 2 3 3 , 4 3 3 , 6 3 3 , 8 3 4 , 3 4 , 2 3 4 , 4 3 4 , 6 3 4 , 8 3 5 , , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 1 ,

Depth [salt water, m] Salinity [PSU] Oxygen, SBE 43 [mg/l]

RESULTS

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400 350 300 250 200 150 100 50

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Salinity [PSU] O SBE 43 [ /l] 400 350 300 250 200 150 100 50

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Salinity [PSU] O SBE 43 [ /l]

Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

400 2 4 6 8 10 12 14 16 18 400 350 300 250 200 150 100 50 2 4 6 8 10 12 14 16 18

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Salinity [PSU] Oxygen, SBE 43 [mg/l] 400 2 4 6 8 10 12 14 16 18 400 350 300 250 200 150 100 50 2 4 6 8 10 12 14 16 18

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Salinity [PSU] Oxygen, SBE 43 [mg/l] 400 350 300 250 200 150 100 50 2 4 6 8 10 12 14 16 18

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0

0,0 0,5 1,0 1,5 2,0 2,5 3,0

0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Temperature [ITS-90, deg C] Fluorescence, Seapoint Salinity [PSU] Oxygen, SBE 43 [mg/l] 400 350 300 250 200 150 100 50 2 4 6 8 10 12 14 16 18

33,0 33,2 33,4 33,6 33,8 34,0 34,2 34,4 34,6 34,8 35,0

0,0 0,5 1,0 1,5 2,0 2,5 3,0

0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0

Depth [salt water, m] Temperature [ITS-90, deg C] Fluorescence, Seapoint Salinity [PSU] Oxygen, SBE 43 [mg/l]

RESULTS

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Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

RESULTS

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Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

RESULTS

2009 2010

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Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

RESULTS: OCEANOGRAPHIC FEATURES AND FISH

MAY 2009 MAY 2010

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Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

RESULTS

MONTH N° UBM Total N° UBM Pos TS mean

.sp

W mean .Ton Dens mean dens.mean Variance

  • Nav. days

JANUARY 1542 89

  • 39.11

0.00154 376.34 4.09 27.46 42337 747495.22 8 FEBRUARY 3206 218

  • 39.11

0.00154 384.19 4.01 15.2 48714 23822.33 16 MARCH 4072 324

  • 38.18

0.00191 557.19 3.43 21.21 86384 134307.66 22 APRIL 4750 1086

  • 37.06

0.00247 712.96 3.47 38.38 182281 157677.25 24 MAY 5221 1347

  • 37.05

0.00248 714.26 3.47 119.43 623553 934385.92 25 JUNE

  • JULY

5802 3567

  • 36.91

0.00256 712.25 3.6 311.5 1807306 4647777.56 19 AUGUST 4886 1435

  • 36.83

0.0026 726.14 3.59 44.08 215382 104452.18 23 SEPTEMBER 2396 863

  • 36.82

0.00261 736.11 3.54 25.14 60239 34054.85 10 OCTOBER

  • NOVEMBER

1027 54

  • 36.83

0.0026 913.19 2.86 17.99 18474 38629.2 5 DECEMBER 3996 758

  • 40.62

0.00109 222.9 4.89 13.48 53873 14518.82 18 TOTAL 36898 9741

  • 37.852

0.00214 605.553 3.695 63.387 3138543 683712.099 170 MONTH N° UBM Total N° UBM Pos TS mean

.sp

W mean .Ton Dens mean dens.mean Variance

  • Nav. days

JANUARY 4305 508

  • 40.3

0.00117 252.8 4.64 35.55 153023 257339.91 23 FEBRUARY 2921 327

  • 40.3

0.00117 260.49 4.51 43.59 127322 82093.86 18 MARCH 1515 463

  • 37.37

0.0023 635.68 3.62 86.43 130951 176250.6 6 APRIL 4742 997

  • 37.18

0.0024 678.13 3.55 19.47 92339 22002.91 23 MAY 5296 1474

  • 37

0.0025 715.66 3.5 19.48 103182 23233.15 24 JUNE 2810 32

  • 37

0.0025 720.74 3.48 0.85 2399 352.78 18 JULY 4211 546

  • 37

0.0025 694.46 3.61 75.03 315940 621793.97 23 AUGUST 3951 276

  • 37.18

0.00241 638.55 3.77 45.14 178344 293111.03 24 SEPTEMBER 1250 53

  • 34.71

0.00424 1452.3 2.93 18.14 22676 36517.73 6 OCTOBER NOVEMBER 3953 380

  • 38.83

0.00165 352.11 4.68 17.1 67602 105154.58 20 DECEMBER 3287 162

  • 38.82

0.00164 430.72 3.82 16.21 53295 43453.71 18 TOTAL 38241 5218

  • 37.79

0.00223 621.058 3.828 34.27 1247073 151027.66 203

2009 2010

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Instituto de Investigación Pesquera - Departamento de Pesquerías – www.inpesca.cl

CONCLUSIONS

Mean densities of Chilean Jack Mackerel in year 2010 were less than the densities obtained in year 2009. Jack Mackerel aggregations are mainly found at the borders of anticyclonic gyres and in zones characterized by relative mean vorticities. Jack Mackerel aggregations detected in year 2010 were distributed more close to the surface than the observed in 2009. A clear seasonal pattern of bathymetric distribution of aggregations was found, with deeper use of the water column during winter months and a shallower vertical distribution in summer. A reduced relative abundance of food organisms was found in year 2010, both at coastal and

  • ceanic waters.

Higher densities of Jack Mackerel were close distributed to zones with higher densities of food

  • rganisms.

18 July 2017 SC5-Doc10