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

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 measurements by On board measurements by Chinese fishery scientific observers program

Items of data collected n Fishing data: q catch per tow q fishing time and positions, towing speed etc. n Environment data: q Current and wind direction and speed, SST, STD Current and wind direction and speed, SST, STD etc.

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.

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

Fishing ground in 2000 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

Fishing ground in 2001 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

Fishing ground in 2002 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

Fishing ground in 2003 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

Fishing ground in 2004 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

Fishing ground in 2005 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

Fishing ground in 2006 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

Fishing ground in 2007 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S 43°S 44°S 45°S 46°S

CPUE CPUE （ ton/hour ） of 8 fishing vessels during 2000-2007 2000 2001 2002 2003 2004 2005 2006 2007 mean CPUE CPUE 7.86 7.20 6.39 5.26 5.07 5.95 7.52 6.81 6.21

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.

by 1 o x 1 o during 2000 Mean catch per tow and 2007 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 36°S 37°S 38°S 39°S 40°S 41°S 42°S <30t 43°S 30-50t 44°S >50t 45°S 46°S

CPUE in 1 o x 1 o from 2000 to 2007 110°W 106°W 102°W 98°W 94°W 90°W 86°W 82°W 78°W 29°S 30°S 31°S 32°S 33°S 34°S 35°S 36°S 36°S 37°S 38°S 39°S 40°S 41°S CPUE>10t/h 42°S 43°S 10t/h>CPUE>5t/h 44°S CPUE<5t/h 45°S 46°S Size of circle represents the number of tows

3000 2500 W= 6.5075771E-06L 3.0709954E+00 2500 R 2 = 9.8617068E-01 2000 W = 6.9589036E-06L 3.0601179E+00 2000 体重/g R 2 = 9.8375892E-01 1500 /g 1500 重 体 1000 1000 500 500 0 0 100 200 300 400 500 600 700 100 200 300 400 500 600 700 叉长/mm 叉长/mm 图23 2001年竹筴鱼叉长与体重的关系 图22 2000年竹筴鱼叉长与体重的关系 1600 1400 W = 3.2778259E-05L 2.8042901E+00 R 2 = 9.4081453E-01 1200 1200 R = 9.4081453E-01 1200 1200 W = 5.6521510E-06L 3.0924285E+00 1000 1000 R 2 = 9.8721441E-01 体重/g 800 g 800 / 重 体 600 600 400 400 200 200 0 100 200 300 400 500 600 0 叉长/mm 图24 2002年竹筴鱼叉长与体重的关系 200 300 400 500 600 叉长/mm 图26 2006年竹筴鱼叉长与体重的关系 1600 1400 W = 1.6630586E-05L 2.9325875E+00 1200 R 2 = 9.7466909E-01 500 1000 W= 1.6328285E-05L 2.9151638E+00 体重/g 400 g R 2 = 9.9284572E-01 800 / 重 300 体 600 200 400 100 200 0 0 100 150 200 250 300 350 400 250 300 350 400 450 500 550 叉长/mm 叉长/mm 图25 2003年竹筴鱼叉长与体重的关系 图27 2007年竹筴鱼叉长与体重的关系

Frequency of main habitat w ater layers w here Chile jack mackerel existing 时间/time 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 0 50 鱼群栖息水深/m 100 150 200 250 300 350 400 图46 智利竹筴鱼鱼群分布水深（时间）

Water temperature w here fish stay

Stomach fullness index

Map of Feeding

Feeding index

Sexual gland

Thank you for attention