Report of data collection on Jack mackerel in South-East Pacific - - PowerPoint PPT Presentation

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report of data collection on jack mackerel in south east

Report of data collection on Jack mackerel in South-East Pacific - - PowerPoint PPT Presentation

Aug 22, 2023 190 likes •465 views

Report of data collection on Jack mackerel in South-East Pacific Pacific Min Zhang, Xiaorong Zou, Yingqi Zhou* Shanghai Ocean University, China 2008-6 Data collection n log books of Chinese fishing fleet during 2000-2007 n On board

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Report of data collection on Jack mackerel in South-East Pacific Pacific

Min Zhang, Xiaorong Zou, Yingqi Zhou* Shanghai Ocean University, China 2008-6

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Data collection

n log books of Chinese fishing

fleet during 2000-2007 On board measurements by

n On board measurements by

Chinese fishery scientific

bservers program

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Items of data collected

n Fishing data:

q catch per tow q fishing time and positions, towing speed etc.

n Environment data:

Current and wind direction and speed, SST, STD

q Current and wind direction and speed, SST, STD

etc.

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Biological data by the random sampling

n 11,030 samples have been collected

q fork length, body height, width and girth, body

weight and net weight without organs,

q sex, germ cells maturity, contains in the stomach

etc. etc.

q Water depth of fish school inhabited and

temperature

n 2,550 otolithes collected

q age and other tests

n Plankton, botany and other species etc.

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Fishing and survey area

n beyond Chile EEZ to 113°W n from 29°S to 46°S

Survey area of Vessel Fuxinhai in 2007

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Fishing ground in 2000

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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Fishing ground in 2001

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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Fishing ground in 2002

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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Fishing ground in 2003

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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Fishing ground in 2004

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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Fishing ground in 2005

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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Fishing ground in 2006

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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Fishing ground in 2007

29°S 30°S 31°S 32°S 33°S 34°S 35°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

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CPUE

2000 2001 2002 2003 2004 2005 2006 2007 mean CPUE

CPUE（ton/hour）of 8 fishing vessels during 2000-2007

CPUE 7.86 7.20 6.39 5.26 5.07 5.95 7.52 6.81 6.21

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Species in catch

n Chile mackerel (Trachurus murphyi) n Japanese mackerel (Scomber japonicus) less

than 10-20% in the total catch

q pacific scad (Scomberomorus sierra), q pacific scad (Scomberomorus sierra), q yellowtail (Seriola laland) q lantrenfishes (Myctophidae) q Jumbo flying squid (Dosidicus gigas) has been

caught since 2006, about 5-10% in the catch.

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Mean catch per tow by 1ox 1o during 2000 and 2007

29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S <30t 30-50t >50t

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CPUE in 1ox 1o from 2000 to 2007

29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 78°W 82°W 86°W 90°W 94°W 98°W 102°W 106°W 110°W 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S CPUE>10t/h 10t/h>CPUE>5t/h CPUE<5t/h

Size of circle represents the number of tows

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图22 2000年竹筴鱼叉长与体重的关系

W= 6.5075771E-06L3.0709954E+00 R2 = 9.8617068E-01 500 1000 1500 2000 2500 3000 100 200 300 400 500 600 700 叉长/mm 体重/g

图23 2001年竹筴鱼叉长与体重的关系

W = 6.9589036E-06L3.0601179E+00 R2 = 9.8375892E-01 500 1000 1500 2000 2500 100 200 300 400 500 600 700 叉长/mm 体重 /g

1200

W = 3.2778259E-05L2.8042901E+00 R2 = 9.4081453E-01 1200 1400 1600

图24 2002年竹筴鱼叉长与体重的关系

W = 5.6521510E-06L3.0924285E+00 R2 = 9.8721441E-01 200 400 600 800 1000 1200 100 200 300 400 500 600 叉长/mm 体重 / g

图25 2003年竹筴鱼叉长与体重的关系

W= 1.6328285E-05L2.9151638E+00 R2 = 9.9284572E-01 100 200 300 400 500 100 150 200 250 300 350 400 叉长/mm 体重 / g

图26 2006年竹筴鱼叉长与体重的关系

R = 9.4081453E-01 200 400 600 800 1000 1200 200 300 400 500 600 叉长/mm 体重/g

图27 2007年竹筴鱼叉长与体重的关系

W = 1.6630586E-05L2.9325875E+00 R2 = 9.7466909E-01 200 400 600 800 1000 1200 1400 1600 250 300 350 400 450 500 550 叉长/mm 体重/g

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Frequency of main habitat w ater layers w here Chile jack mackerel existing

时间/time

图46 智利竹筴鱼鱼群分布水深（时间）

50 100 150 200 250 300 350 400 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 0:00 鱼群栖息水深/m

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Water temperature w here fish stay

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Stomach fullness index

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Map of Feeding

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Feeding index

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Sexual gland

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Thank you for attention