Hiroshi Sasaki

Kentaro WATANABE

Mitsuo FUKUCHI

Yasushi Nakajima

Yoshio INO

National Institute of Polar Research Repository

PLANKTON SAMPLINGS ON BOARD THE FUJI IN 1980-1983 Kentaro WATANABE, (National Institute of Polar Research, Itabashi-ku, Tokyo 173) Yasushi NAKAJIMA, (Sanyo Hydrographic Survey Co., Ltd., Chuo-ku, Tokyo 103) Yoshio INO, (School of Education, Waseda University, Shinjuku-ku, Tokyo 160) Hiroshi SASAKI (Faculty of Agriculture, Tohoku University, Sendai 980) and Mitsuo FUKUCHI (National Institute of Polar Research, Itabashi-ku, Tokyo 173) During every austral summer season, plaakton samplings on board the icebreaker Fuji have been carried out in the Indian sector of the Antarctic Ocean as part of the marine biological program of the Japanese Antarctic Research Expedition (JARE). Details of sampling method and the results of earlier works in 1972-1980 are published elsewhere (Fukuchi and Tanimura, 1981). Since then, three expeditions of JARE-22, -23 and -24 (1980-1983) completed their plankton samplings. The data record of these results is presented in this report. The first and second authors (K. w. and Y. N.) carried out the plankton samplings in JARE-22 (1980/1981), the third author (Y. I.) made the JARE�23's samplings (1981/1982) and the fourth author (H. S.) made the JARE-24's samplings (1982/1983). A single Norpac standard net had been used in the earlier expedi­tions but a twin net was employed in JARE-23 and �24. The twin net consisted of two Norpac standard nets of two different mesh openings as listed in the following tables. -1-Stations of plankton samplings in 1980-1983 are shown in Fig. 1. Data on the Norpac net hauls in JARE-22, -23 and -24 are listed in Tables 1, 2 and 3, respectively. Also, data on the MTD net tows, the ORI-C net tows and the fish larva net tows in JARE-22 are summarized in Tables 4, 5 and 6, respectively. Although measurements of biomass and primary sorting of these net samples are being undertaken, this report.is prepared for the sake of making available to interested persons some preliminary data on plankton samples stored at t�e National Institute of Polar Research. Inquiries about details of the data record should be addressed to: Department of Biological Data Division of Data Collection and Processing National Institute of Polar Research 9-10, Kaga 1-chome, Itabashi-ku, Tokyo 173. Reference Fukuchi, M. and Tanimura, A.: Plankton samplings on board Fuji in 1972-1980. JARE Data Rep., 60 (Marine Biology 1), 27p. -2-15° 30° 60° 90° 105°E AFRICA Exped. Year Norpac MTD ORI-C Fish larva No. net net net net 30° JARE-22 1980/81 0(16) 0(6) L,(6) v'(6) JARE-23 1981 /82 • (7) @ JARE-24 1982/83 @(10) 40° (numbers of stations) @o .� @ 0 • 50° @ 0 • • 60° 0 E56@ 0 • • • @ 70° S ANTARCTICA Fig.l. Stations of plankton net samplings on board the icebreaker Fuji in the Indian sector of the Antarctic Ocean in 1980-1983. -3-Table 1. Data on plankton collected by vertical hauls with a Norpac standard net (0.33 mm mesh openings) in the JARE-22 cruise of the Fuji to the Indian sector of the Antarctic Ocean, Feb. ...; Mar. 1981. Flow-meter was not used . The volume of water filtered by a vertical haul was estimated by assuming 100 % efficiency of the net. Samplings were carried out by K. Watanabe and Y. Nakajima. Stn.No. Position Ship's time Length Angle of Estimated RGS Flow-meter E-stimated Wet weight Wet weight Sample Unusual large 88' 66 °19'S 44°35'E 90' 67°19'S 46°03'E 91 67°36'S 45°06 1 E II II II II II II II II II II II II II II II II II II II II II II Date r· of wire wire (0 ) depth of ime (m) haul (m) 1981 0730 240 45 170 Feb.9 Feb.11 1320 180 35 147 Feb.15 1745 so 0 so II II 100 0 100 II II 150 0 150 Feb.16 1800 so 0 so II 1810 100 0 100 II 1820 150 0 150 II 2250 so 0 so II 2300 100 0 100 II 2310 150 0 150 Feb.17 0730 so 0 so II 0740 100 0 100 II 0750 150 0 150 N R 1 t· volume of of sample 0• evo u ions water in a haul filtered (m3) (g) 38.2 1.5 28.6 0.1 8.0 0.1 15.9 0.1 23,9 0.2 8.0 0.2 15.9 0,2 23.9 0.2 8,0 0.1 15.9 0.6 23.9 0.2 8,0 0,2 15.9 2.4 23.9 4.8 of sample No. organisms per 1000 m3 removed before of water(g) weighing 39.3 22N001 4.5 22N002 15.1 22N003 6.3 22N004 8,0 22NOOS 20,l 22N006 10.1 22N007 8.0 22N008 6,3 22N009 39.0 22N010 7.1 22N011 22,6 22N012 152,2 22N013 199,5 22N014 Table 1. Continued. Stn.No. Position Ship' s time Length Angle of Estimated RGS Flow-meter Estimated Wet weight Wet weight 93 65°00' S 44°55' E 95 65°00' S 40°08'E 97 65 °01' S 35°00' E 99 62 °28' S 35°03' E  101 60 °00' S 34°58'E 103 60°00' S 39°59' E 105 62°29'S 40 °0l' E 107 62°31' S 45 °03' E  109 59°58' S 45°03' E  111 57°31' S 44°59' E 114 54°06' S 45°00' E 117 50°13' S  45°01' E 121 43°18' S 44°57' E Date r· of wire wire C0) depth of ime (m) haul Cm) Feb.20 0800 170 18 162 Feb.21 0758 230 45 163 Feb.22 0750 210 40 161 Feb.23 0749 175 25 159 Feb.24 0750 165 20 155 Feb.25 0750 151 6 150 Feb.26 0751 173 30 150 Feb.27 0745 173 30 150 Feb.28 0747 166 25 150 Mar. 1 0755 173 30 150 Mar. 2 0749 153 12 150 Mar.3 0748 200 42 149 Mar.5 0745 175 25 159 N R 1 t· volwne of of sample 0• evo u ions water in a haul filtered Cg) (m3) 27,0 0.7 36.6 0.5 33,4 0.7 27.8 6.7 26.2 4.4 24.0 9.9 27.5 5.3 p.5 3.1 26.4 19.0 27.5 20,8 24.3 3.3 31.8 3 .0 27.8 4.7 of sample per 1000 m3 of waterCg) 26.3 14.2 21. 3 241.5 167.7 413.0 193.0 112. 7 718.6 756.8 134.0 94.3 168.2 Sample Unusual large No. organisms removed before weighing 22N015 22N016 22N017 22N018 22N019 22N020 22N021 22N022 22N023 22N024 22N025 22N026 22N027 0) Table 2. Data on plankton collected by vertical hauls with two Norpac standard nets (one has 0.33 nun and another has 0.025 nun mesh openings) in the JARE-23 cruise of the Fuji to the Indian sector of the Antarctic Ocean, Feb. - Mar. 1982. Flow-meter was not used. Samplings were carried out by Y. Ino. Stn. Position Ship's time Length Angle of Estimated RGS Flow�meter Estimated Wet weight Wet weight Mesh size Sample Unusual large No. Date 1 63°02'S 1982 48°00'E Feb. 22 2 63°00'S 1982 53°00'E Feb.23 3 63°00'S 1982 60 °06'E Feb.24 4 59°26'S 1982 53°27'E Feb.27 5 55°17'S 1982 49°28'E Mar.2 6 51°04'S 1982 48°06'E Mar.3 7 46°40'S 1982 48° 16 IE Mar. 4 T" of wire wire (0) depth of 1me (m) haul(m) 0815 162 18 154 0810 188 37 150 0805 179 33 150 0806 167 26 150 0745 185 36 150 0753 155 14 150 0751 220 so 141 N R 1 t· volume of of sample 0• evo u ions water in a haul filtered (g) (m3) of sample 3 of net per 1000 m (pm) of.water (g) 330 25 330 25 330. 25 330 25 330 25 330 25 330 25 No. organisms removed before weighing 23N001 23N002 23N003 23N004 23N005 23N006 23N007 23N008 23N009 23N010 23N011 23N012 23N013 23N014 -..J Table 3. Data on plankton collected by vertical hauls with two Norpac standard nets (one has 0.33 mm and another has 0.11 mm mesh openings) in the JARE-24 cruise of the Fuji to the Indian sector of the Antarctic Ocean, Feb. - Mar. 1983. Flow-meter was not used. The volume of water filtered by a vertical haul was estimated by assuming 100 % efficiency of the net. Samplings were carried out by H. Sasaki. Stn. Position Ship's �ime Length Angle of Estimated RGS Flow-meter Estimated Wet weight Wet Weight Mesh size Sample Unusual large No. Date 1 68°59'S 1983 24°48'E Feb.23 2 66°50'S 1983 33°40'E Feb.24 3 64°37'S 1983 38°4l'E Feb.25 4 62°35'S 1983 42°05'E Feb.26 5 59°4l'S 1983 42°00'E Feb.27 6 58°17'S 1983 41°26'E Feb.28 7 53°39'S 1983 42°04'E Mar.2 8 48°5l'S 1983 42°09'E Mar.3 9 44°14'S 1983 42°09'E Mar.4 10 40°22'S 1983 42°24'E Mar.5 r· of wire wire (0 ) depth of ime (m) haul (m) 0800 152 10 149.7 0800 151 ·5 150.4 0800 155 15 149.7 0800 159 20 149.4 0800 151 5 150.4 0800 190 40 145.5 0800 177 26 159.1 0800 151 5 150.4 0800 194 45 137.2 0800 164 25 148.6 N R 1 t· volume of of sample 0• evo u ions water in a haul filtered (g) (m3 24.17 24.01 24.65 25.29 24.01 30.22 28.15 24.01 30.85 26.08 of sample 3 of net No. organisms per 1000 m (pm) removed before of water (g) weighing 330 24N001 llO 24N002 330 24N003 llO 24N004 330 24N005 110 24N006 330 24N007 llO 24N008 330 24N009 llO 24N010 330 24N011 110 24N012 330 24N013 110 24N014 330 24N015 110 24N016 330 24N017 110 24N018 330 24N019 110 24N020 00 Table 4. Data on plankton collected by simultaneous horizontal tows with MTD horizontal closing Stn.No. Position 88' 66°19'S 44 °35'E . 93 65°00'S 44°55'E 97 65°01'S 35°00'E Date 1981 Feb.9 nets (0.35 mm mesh openings) in the JARE-22 cruise of the Fuji to the Indian sector of the Antarctic Ocean, Feb. 1981. The volume of water filtered by a 30 min horizontal tow is calculated to be 456 m3 when filtration efficiency of the net is 100 %. Samplings were carried out by K. Watanabe and Y. Nakajima Series of Net Ship's time Length sampling 1 No. Net out 1 1342 2 1340 3 1337 4 1333 Net in 1421 1422 1424 1426 5 1330 · 1429 6 1327 1432 7 1321 1435 8 1310 1440 of wire (m) 15 so 85 155 225 295 435 725 Angle Estimated Wet weight Wet weight Sample of wire depth of of sample of sample No. (0) tow (m) in a tow per 1000 m3 (g) of water ( ) 45 0 0.3 -0. 7 22M0101 45 25 6.0 13.1 22M0102 45 so 5.5 12.1 22M0103 45 100 8.8 19.3 22M0104 45 150 8.0 17.4 22M0105 45 200 8.1 17.7 22M0106 45 300 8.1 17.7 22M0107 45 500 10.0 21.8 22M0108 Unusual large organisms removed before weighing Feb. 20 1 l 1435 1512 15 45 0 0.4 1.0 22M0201 2 1434 1512 30 45 10 13.3 29.0 22M0202 3 1433 1513 so 45 25 1.3 2.8 22M0203 4 1432 1514 85 45 so 1.6 3.4 22M0204 5 1430 1516 155 45 100 3.9 8.6 22M0205 6 1425 1520 295 45 200 5.1 11.2 22M0206 7 1421 1524 435 45 300 5.0 11.0 22M0207 8 1412 1530 725 45 500 15.6 34.2 22M0208 9 1400 1540 1145 45 800 s.o 10.9 22M0209 1 Fish larva(2.8 gr) Feb.22 1 1 1537 1614 15 45 0 0.5 1.1 22M0301 2 Euphausiids (1.1 gr) 2 1536 1615 so 45 25 1.2 2.6 22M0302 3 1535 1616 85 45 so 0.5 1.1 22M0303 1 Euphausiid(0.6 gr) 4 1533 1617 155 45 100 0.9 1.9 22M0304 5 1530 1619 225 45 150 2.6 5.7 22M0305 6 1527 1621 295 45 200 1.6 3.6 22M0306 7 1523 1623 435 45 300 6.1 13.4 22M0307 Many Medusae ( 4 .1 gr) 8 1515 1628 725 45 500 - - 22M0308 9 1503 1635 1145 45 800 2.2 4.9 22M0309 Stn.No. Position Date 101 60°00'S Feb.24 34°58'E co 105 62°29'S Feb.26 40°0l'E 109 s9°s8 1 s Feb.28 45°03'E Table 4. Continued. Series of Net.Ship's time Length Angle Estimated Wet weight Wet weight Sample sampling No. Net Net of wire of wire depth of of sample of sample No. out in (m) Co) tow (m) in a tow per 1000 m3 (g) of water ( ) 1 1 1419 1457 15 45 0 4.6 10.1 22M0401 2 1418 1458 so 45 25 43.6 95.5 22M0402 3 1417 1459 85 45 so 41.0 89.7 22M0403 4 1415 1500 155 45 100 46.3 101.4 22M0404 5 1413 1501 225 45 150 34.3 75.1 22M0405 6 1411 1502 295 45 200 19.0 41.6 22M0406 7 1407 1505 435 45 300 12.3 27.0 22M0407 8 1400 1510 725 45 500 17.6 38.5 22M0408 9 1350 1517 1145 45 800 5.4 11.8 22M0409 1 1 1513 1553 15 45 0 284.6 623.3 22M0501 2 1512 1553 so 45 25 464.8 1017.9 22M0502 3 1511 1554 85 45 so 6.3 13.8 22M0503 4 1510 1555 155 45 100 6.8 14.8 22M0504 5 1508 1557 225 45 150 2.6 5.6 22MOSOS 6 1506 1558 295 45 200 4.0 8.7 22MOS06 7 1502 1600 435 45 300 1. 7 3.7 22M0507 8 1455 1605 725 45 500 4.9 10.6 22M0508 9 1445 1615 1145 45 800 0.7 1.6 22M0509 1 1 1430 1508 15 45 0 248.1 543.4 22M0601 2 1429 1509 so 45 25 391.7 857.7 22M0602 3 1428 1510 85 45 so 506.0 1108 .1 22M0603 4 1426 1511 155 45 100 800.8 1753.8 22M0604 5 1424 1513 225 45 150 495.9 1086.1 22M0605 6 1422 1514 295 45 200 51.4 112.5 22M0606 7 1418 1517 435 45 300 28.2 61. 7 22M0607 8 1410 1519 ns 45 500 57.6 126.2 22M0608 9 1358 1526 1145 45 800 10.8 23.5 22M0609 Unusual large organisms removed before weighing 1 Polychaeta (3.l gr) 1 Medusa (48.9 gr) Many Medusae (l67.9 gr) ...... 0 Table 5. Data on plankton collected by oblique tows with ORI-C net (1.97 and 0.33 mm mesh openings) in the JARE-22 cruise of the Fuji to the Indian sector of the Antarctic Ocean, Feb. 1981. Samplings were carried out by K. Watanabe and Y. Nakajima. Stn.No. Position Date Ship's time Length Angle Maximum depth of Maximum depth* Wet weight of Sample Unusual large Net Net of wire of wire tow estimated recorded sample in a No. organisms removed out in (m) (0) (m) (m) tow (g) before weighing 88' 66°19'S 1981 1455 1524 350 55 200 220 16.2 220R001 44 °35'E Feb.9 93 65°00'S Feb.20 1549 1628 500 67-56 (195-) 279 310 88 1 3 220R002 44°55 1 E 97 65°0l'S Feb.22 1644 1723 500 63 226 180 17.2 220R003 35°00'E 101 60°00'S Feb.24 1531 1615 500 65-50 (211-)321 300 114.5 220R004 34°58'E 105 62°29'S Feb.26 1628 1709 500 68-15 (187-) 482 420 59.7 220R005 40°0l'E 109 59°58'S Feb.28 1538 1615 500 65-60 250 300 151.8 220R006 45°03'E * The depth was recorded by a TS depth-distance recorder. Table 6. Data on plankton collected by surface horizontal tows with fish larva net (1. 97 and 0.33 nun mesh openings) in the JARE-22 cruise of the Fuji to the Indian sector of the Antarctic Ocean, Feb. 1981. Samplings were carried out by K. Watanabe and Y. Nakajima. Stn. No. Position Date Ship' s time Wet weight of Sample No. Unusual large sample in a tow organisms removed Net out Net in (g) before weighing 88' 66°19' S 1981 1500 1520 1. 5 22F001 44 °35'E Feb.9 93 65 °00' S Feb.20 1555 1615 1. 2 22F002 44 °55'E 97 65 °0l' S Feb.22 1645 1705 0.4 22F003 35 °00'E  ....... 101 60°00' S Feb.24 1535 1555 5.7 22F004 ....... 34°58' E 105 62 °29' S Feb.26 1632 1652 128.3 22F005 40° 0l' E 109 59°58' S Feb.28 1540 1600 132.4 22F006 45 °03'E 

PLANKTON SAMPLINGS ON BOARD THE FUJI IN 1980-1983

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PLANKTON SAMPLINGS ON BOARD THE FUJI IN 1980-1983

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