Resources

RRS James Clark Ross JR19980514 (AMT6, JR32)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR19980514 (AMT6, JR32)
Cruise period1998-05-14 — 1998-06-16
StatusCompleted
Port of departureCape Town, South Africa
Port of returnGrimsby, United Kingdom
ObjectivesThe Atlantic Meridional Transect (AMT) programme exploits the passage of the Royal Research Ship (RRS) James Clark Ross (JCR) latitudinally through the Atlantic Ocean between the United Kingdom and the Falkland Islands (approximately 52° N to 52° S) in support of British Antarctic Survey (BAS) research activities in the Antarctic and its environs. In September, the JCR sails southward, sampling the boreal fall and the austral springconditions in the northern hemisphere. The ship's track crosses a range of ecosystems and physicochemical regimes, within which conditions vary from sub-polar to tropical and from eutrophic shelf seas and upwelling systems to oligotrophic and mid-ocean gyres. The JCR provides the ideal platform to measure physical, biological and bio-optical properties and processes through these diverse ecosystems of the North and South Atlantic Oceans.

The AMT programme goals are:
1. To test and refine hypotheses on the responses of oceanic ecosystems and the coupled marine atmosphere to anthropogenically forced environmental change.
2. To develop a holistic research strategy, integrating shipboard measurements, remote sensing and modelling.
3. To provide calibration and validation of new satellite sensors of ocean colour, sea surface temperature, sea surface height and solar radiation.
4. To improve our knowledge of marine biogeochemical processes, ecosystem dynamics, food-webs and fisheries and characterize biogeochemical provinces.
5. To develop coupled physical-biological models of production and ecosystem dynamics.
6. To quantify ocean responses to changes in abundance of radiatively and chemically-active trace gases.

The normal strategy for AMT cruises is set by the requirement for the JCR to make passage between the UK and the FI within the allocated time of 25 d plus 6 d added for scientific research. The geographical range of 50° N, 1° W to 52° S, 58° W, amounts to approximately 7500 miles (13800 km), requiring an average distance of 240 miles per day, or 4° of latitude while on a N-S course (as on the 20° W line). For AMT-6, with a focus on a high productivity, upwelling ecosystems and with 6 d extra for science spread of greatest interest (e.g. the Benguela). Thus the plan was to proceed northwards through the Benguela at only ca 150 miles per day, with more than one station as necessary and make a faster passage through the oligotrophic regions.
Chief scientistJames Aiken (Plymouth Marine Laboratory)
ProjectAMT
Cruise reportRRS James Clark Ross JR19980514 (AMT6, JR32) cruise report jr_amt6.pdf (6.36 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
South Atlantic Ocean
Track chartsRRS James Clark Ross JR19980514 (AMT6, JR32) cruise track — jr_amt6track.pdf (0.04 MB) 
Measurements 
Physical oceanography 
Water bottle stationsDescription: Water bottle samples were collected using the rosette system. No. of samples not noted.
CTD stationsDescription: CTD station samples were collected. No. of samples not noted.
Optics (eg underwater light levels)Description: Optical measurements were taken with SeaOPS, SeaFALLS, LoCNESS and miniNESS. No. of measurements not noted.
Biology and fisheries 
Primary productivityDescription: Data on phytoplankton pigments and species, primary productivity and zooplankton was gathered. No. of samples not noted.
PhytoplanktonDescription: Data on phytoplankton pigments and species, primary productivity and zooplankton was gathered. No. of samples not noted.
ZooplanktonDescription: Data on phytoplankton pigments and species, primary productivity and zooplankton was gathered. No. of samples not noted.
Data held at BODC Get data
Series/Profiles 
76  Bottle station
Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column
Quality control flags
Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrate concentration parameters in the water column
Quality control flags

BODC idDate/TimeLocationDoc.
10944881998-06-04 10:08 12° 47' 31" N  19° 14' 39" W  View metadata report for BODC series reference number 1094488
10945071998-05-21 08:24 28° 55' 44" S  16° 11' 14" E  View metadata report for BODC series reference number 1094507
10945441998-06-12 09:06 44° 40' 40" N  14° 0' 35" W  View metadata report for BODC series reference number 1094544
10945561998-06-13 10:09 48° 26' 55" N  9° 41' 51" W  View metadata report for BODC series reference number 1094556
10947901998-05-28 09:29 8° 37' 21" S  0° 35' 53" E  View metadata report for BODC series reference number 1094790
10948081998-05-29 08:57 5° 51' 52" S  2° 37' 30" W  View metadata report for BODC series reference number 1094808
10948451998-06-01 10:02 3° 4' 27" N  12° 46' 19" W  View metadata report for BODC series reference number 1094845
17888111998-05-24 09:32 18° 59' 36" S  11° 59' 53" E  View metadata report for BODC series reference number 1788811
17888471998-05-27 08:51 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1788847
17889151998-05-30 09:29 2° 48' 38" S  6° 10' 10" W  View metadata report for BODC series reference number 1788915
17890391998-06-05 10:08 16° 22' 39" N  20° 0' 17" W  View metadata report for BODC series reference number 1789039
17890401998-06-07 09:21 24° 30' 20" N  20° 0' 1" W  View metadata report for BODC series reference number 1789040
17891191998-06-12 09:06 44° 40' 40" N  14° 0' 35" W  View metadata report for BODC series reference number 1789119
10944401998-06-07 09:21 24° 30' 20" N  20° 0' 1" W  View metadata report for BODC series reference number 1094440
10944521998-06-09 08:20 32° 25' 41" N  17° 2' 55" W  View metadata report for BODC series reference number 1094452
10946001998-06-10 09:21 36° 36' 50" N  17° 30' 17" W  View metadata report for BODC series reference number 1094600
10946361998-06-05 09:30 16° 22' 41" N  20° 0' 15" W  View metadata report for BODC series reference number 1094636
10946481998-05-26 08:55 14° 44' 35" S  7° 51' 38" E  View metadata report for BODC series reference number 1094648
10946731998-05-30 09:29 2° 48' 38" S  6° 10' 10" W  View metadata report for BODC series reference number 1094673
10947041998-06-08 09:21 28° 41' 3" N  19° 52' 14" W  View metadata report for BODC series reference number 1094704
10947771998-05-27 08:51 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1094777
10948211998-05-30 08:50 2° 48' 39" S  6° 9' 57" W  View metadata report for BODC series reference number 1094821
17887181998-05-15 14:06 33° 37' 26" S  18° 0' 20" E  View metadata report for BODC series reference number 1788718
17887671998-05-21 08:24 28° 55' 44" S  16° 11' 14" E  View metadata report for BODC series reference number 1788767
17887791998-05-22 08:22 24° 45' 0" S  14° 19' 25" E  View metadata report for BODC series reference number 1788779
17888841998-05-29 08:57 5° 51' 52" S  2° 37' 30" W  View metadata report for BODC series reference number 1788884
17889641998-06-02 09:50 5° 51' 44" N  16° 4' 54" W  View metadata report for BODC series reference number 1788964
10945681998-06-14 09:20 49° 50' 18" N  4° 9' 11" W  View metadata report for BODC series reference number 1094568
10946241998-05-29 09:34 5° 51' 47" S  2° 37' 45" W  View metadata report for BODC series reference number 1094624
10947891998-05-27 09:23 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1094789
17887551998-05-18 08:50 26° 41' 50" S  14° 14' 42" E  View metadata report for BODC series reference number 1788755
17889271998-05-31 08:33 0° 1' 42" S  8° 51' 29" W  View metadata report for BODC series reference number 1788927
17889401998-06-01 10:02 3° 4' 27" N  12° 46' 19" W  View metadata report for BODC series reference number 1788940
17889761998-06-03 09:22 9° 3' 47" N  19° 7' 15" W  View metadata report for BODC series reference number 1788976
17889881998-06-03 09:59 9° 3' 48" N  19° 7' 15" W  View metadata report for BODC series reference number 1788988
17890151998-06-04 10:08 12° 47' 31" N  19° 14' 39" W  View metadata report for BODC series reference number 1789015
10945201998-06-10 10:02 36° 36' 50" N  17° 30' 18" W  View metadata report for BODC series reference number 1094520
10947281998-05-17 08:26 29° 31' 20" S  16° 27' 9" E  View metadata report for BODC series reference number 1094728
10947531998-05-22 08:22 24° 45' 0" S  14° 19' 25" E  View metadata report for BODC series reference number 1094753
10948691998-06-06 09:29 20° 24' 19" N  20° 0' 8" W  View metadata report for BODC series reference number 1094869
17887311998-05-16 08:30 32° 20' 22" S  17° 52' 35" E  View metadata report for BODC series reference number 1788731
17887431998-05-17 08:26 29° 31' 20" S  16° 27' 9" E  View metadata report for BODC series reference number 1788743
17888351998-05-26 08:55 14° 44' 35" S  7° 51' 38" E  View metadata report for BODC series reference number 1788835
17888601998-05-28 08:49 8° 37' 33" S  0° 36' 19" E  View metadata report for BODC series reference number 1788860
17889521998-06-02 09:26 5° 51' 44" N  16° 4' 53" W  View metadata report for BODC series reference number 1788952
17890271998-06-05 09:30 16° 22' 41" N  20° 0' 15" W  View metadata report for BODC series reference number 1789027
17891071998-06-11 09:22 41° 4' 48" N  17° 25' 53" W  View metadata report for BODC series reference number 1789107
10946611998-05-28 08:49 8° 37' 33" S  0° 36' 19" E  View metadata report for BODC series reference number 1094661
10944641998-05-25 08:55 17° 39' 32" S  11° 19' 50" E  View metadata report for BODC series reference number 1094464
10944761998-05-31 08:33 0° 1' 42" S  8° 51' 29" W  View metadata report for BODC series reference number 1094476
10947161998-05-15 14:06 33° 37' 26" S  18° 0' 20" E  View metadata report for BODC series reference number 1094716
17888961998-05-29 09:34 5° 51' 47" S  2° 37' 45" W  View metadata report for BODC series reference number 1788896
17890521998-06-08 09:21 28° 41' 3" N  19° 52' 14" W  View metadata report for BODC series reference number 1789052
10946121998-05-24 08:38 18° 59' 45" S  11° 59' 58" E  View metadata report for BODC series reference number 1094612
10947411998-05-18 08:50 26° 41' 50" S  14° 14' 42" E  View metadata report for BODC series reference number 1094741
17887801998-05-23 10:35 21° 39' 8" S  12° 24' 15" E  View metadata report for BODC series reference number 1788780
17887921998-05-24 08:38 18° 59' 45" S  11° 59' 58" E  View metadata report for BODC series reference number 1788792
17888591998-05-27 09:23 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1788859
17888721998-05-28 09:29 8° 37' 21" S  0° 35' 53" E  View metadata report for BODC series reference number 1788872
17890031998-06-04 09:23 12° 47' 21" N  19° 14' 38" W  View metadata report for BODC series reference number 1789003
17890641998-06-09 08:20 32° 25' 41" N  17° 2' 55" W  View metadata report for BODC series reference number 1789064
17891201998-06-13 10:09 48° 26' 55" N  9° 41' 51" W  View metadata report for BODC series reference number 1789120
10946851998-06-02 09:26 5° 51' 44" N  16° 4' 53" W  View metadata report for BODC series reference number 1094685
10947651998-05-24 09:32 18° 59' 36" S  11° 59' 53" E  View metadata report for BODC series reference number 1094765
10948331998-06-01 09:27 3° 4' 23" N  12° 46' 18" W  View metadata report for BODC series reference number 1094833
17888231998-05-25 08:55 17° 39' 32" S  11° 19' 50" E  View metadata report for BODC series reference number 1788823
17889031998-05-30 08:50 2° 48' 39" S  6° 9' 57" W  View metadata report for BODC series reference number 1788903
17889391998-06-01 09:27 3° 4' 23" N  12° 46' 18" W  View metadata report for BODC series reference number 1788939
17890761998-06-10 09:21 36° 36' 50" N  17° 30' 17" W  View metadata report for BODC series reference number 1789076
10945191998-06-03 09:59 9° 3' 48" N  19° 7' 15" W  View metadata report for BODC series reference number 1094519
10945321998-06-11 09:22 41° 4' 48" N  17° 25' 53" W  View metadata report for BODC series reference number 1094532
10945811998-06-03 09:22 9° 3' 47" N  19° 7' 15" W  View metadata report for BODC series reference number 1094581
10945931998-06-05 10:08 16° 22' 39" N  20° 0' 17" W  View metadata report for BODC series reference number 1094593
10946971998-06-04 09:23 12° 47' 21" N  19° 14' 38" W  View metadata report for BODC series reference number 1094697
10948571998-06-02 09:50 5° 51' 44" N  16° 4' 54" W  View metadata report for BODC series reference number 1094857
17890881998-06-10 10:02 36° 36' 50" N  17° 30' 18" W  View metadata report for BODC series reference number 1789088
51  CTD/STD cast
Transmittance and attenuance of the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Raw fluorometer output
Chlorophyll pigment concentrations in water bodies
Transmittance and attenuance of the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Raw fluorometer output
Chlorophyll pigment concentrations in water bodies

BODC idDate/TimeLocationDoc.
10595581998-05-31 08:19 0° 1' 42" S  8° 51' 29" W  View metadata report for BODC series reference number 1059558
10597801998-05-24 08:26 18° 59' 45" S  11° 59' 58" E  View metadata report for BODC series reference number 1059780
10598961998-05-29 09:20 5° 51' 47" S  2° 37' 45" W  View metadata report for BODC series reference number 1059896
10600011998-06-05 09:17 16° 22' 41" N  20° 0' 15" W  View metadata report for BODC series reference number 1060001
10600131998-06-06 09:16 20° 24' 19" N  20° 0' 9" W  View metadata report for BODC series reference number 1060013
10595221998-06-12 08:38 44° 40' 40" N  14° 0' 35" W  View metadata report for BODC series reference number 1059522
10595461998-06-14 09:07 49° 50' 19" N  4° 9' 11" W  View metadata report for BODC series reference number 1059546
10596141998-05-16 08:18 32° 20' 22" S  17° 52' 35" E  View metadata report for BODC series reference number 1059614
10597921998-05-24 09:20 18° 59' 35" S  11° 59' 53" E  View metadata report for BODC series reference number 1059792
10598111998-05-24 11:54 18° 54' 29" S  12° 9' 4" E  View metadata report for BODC series reference number 1059811
10599881998-06-04 09:54 12° 47' 31" N  19° 14' 39" W  View metadata report for BODC series reference number 1059988
10600371998-06-08 09:07 28° 41' 3" N  19° 52' 14" W  View metadata report for BODC series reference number 1060037
10596021998-05-15 13:51 33° 37' 26" S  18° 0' 20" E  View metadata report for BODC series reference number 1059602
10596381998-05-17 08:15 29° 31' 20" S  16° 27' 9" E  View metadata report for BODC series reference number 1059638
10596991998-05-18 15:01 26° 41' 39" S  13° 29' 50" E  View metadata report for BODC series reference number 1059699
10597181998-05-21 11:50 28° 32' 36" S  15° 48' 6" E  View metadata report for BODC series reference number 1059718
10597791998-05-23 13:39 21° 23' 53" S  12° 6' 4" E  View metadata report for BODC series reference number 1059779
10598231998-05-25 11:43 17° 26' 21" S  11° 4' 20" E  View metadata report for BODC series reference number 1059823
10598591998-05-27 09:09 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1059859
10598601998-05-28 08:36 8° 37' 32" S  0° 36' 19" E  View metadata report for BODC series reference number 1059860
10598841998-05-29 08:46 5° 51' 52" S  2° 37' 30" W  View metadata report for BODC series reference number 1059884
10599151998-05-30 09:16 2° 48' 37" S  6° 10' 10" W  View metadata report for BODC series reference number 1059915
10599271998-06-01 09:13 3° 4' 23" N  12° 46' 18" W  View metadata report for BODC series reference number 1059927
10600491998-06-09 08:08 32° 25' 41" N  17° 2' 55" W  View metadata report for BODC series reference number 1060049
10596871998-05-18 11:32 26° 42' 33" S  13° 57' 18" E  View metadata report for BODC series reference number 1059687
10597431998-05-22 12:11 24° 16' 31" S  14° 6' 18" E  View metadata report for BODC series reference number 1059743
10598471998-05-27 08:37 11° 37' 15" S  4° 8' 21" E  View metadata report for BODC series reference number 1059847
10598721998-05-28 09:15 8° 37' 21" S  0° 35' 53" E  View metadata report for BODC series reference number 1059872
10600251998-06-07 09:08 24° 30' 20" N  20° 0' 1" W  View metadata report for BODC series reference number 1060025
10595341998-06-13 09:55 48° 26' 55" N  9° 41' 51" W  View metadata report for BODC series reference number 1059534
10596511998-05-17 11:18 29° 21' 51" S  16° 15' 1" E  View metadata report for BODC series reference number 1059651
10596751998-05-18 08:40 26° 41' 51" S  14° 14' 42" E  View metadata report for BODC series reference number 1059675
10597671998-05-23 10:21 21° 39' 8" S  12° 24' 15" E  View metadata report for BODC series reference number 1059767
10598351998-05-26 08:41 14° 44' 35" S  7° 51' 38" E  View metadata report for BODC series reference number 1059835
10599031998-05-30 08:36 2° 48' 40" S  6° 9' 57" W  View metadata report for BODC series reference number 1059903
10599521998-06-02 09:36 5° 51' 44" N  16° 4' 54" W  View metadata report for BODC series reference number 1059952
10600501998-05-31 09:06 0° 1' 19" S  8° 51' 48" W  View metadata report for BODC series reference number 1060050
10595951998-06-10 09:08 36° 36' 51" N  17° 30' 17" W  View metadata report for BODC series reference number 1059595
10597061998-05-21 08:10 28° 55' 44" S  16° 11' 14" E  View metadata report for BODC series reference number 1059706
10597551998-05-23 04:16 22° 5' 33" S  12° 36' 33" E  View metadata report for BODC series reference number 1059755
10599761998-06-04 09:09 12° 47' 21" N  19° 14' 38" W  View metadata report for BODC series reference number 1059976
10600621998-06-10 09:48 36° 36' 50" N  17° 30' 17" W  View metadata report for BODC series reference number 1060062
10595831998-06-05 09:55 16° 22' 40" N  20° 0' 17" W  View metadata report for BODC series reference number 1059583
10596261998-05-16 11:17 32° 3' 28" S  17° 51' 58" E  View metadata report for BODC series reference number 1059626
10596631998-05-18 04:24 26° 42' 32" S  14° 47' 54" E  View metadata report for BODC series reference number 1059663
10597311998-05-22 08:12 24° 45' 0" S  14° 19' 25" E  View metadata report for BODC series reference number 1059731
10599401998-06-02 09:12 5° 51' 44" N  16° 4' 54" W  View metadata report for BODC series reference number 1059940
10599641998-06-03 09:45 9° 3' 47" N  19° 7' 15" W  View metadata report for BODC series reference number 1059964
10595101998-06-11 09:07 41° 4' 47" N  17° 25' 54" W  View metadata report for BODC series reference number 1059510
10595711998-06-03 09:13 9° 3' 47" N  19° 7' 15" W  View metadata report for BODC series reference number 1059571
10599391998-06-01 09:48 3° 4' 27" N  12° 46' 19" W  View metadata report for BODC series reference number 1059939
1  Meteorological data logger
Visible waveband radiance and irradiance measurements in the atmosphere
Horizontal spatial co-ordinates
Date and time
Air temperature
Wind strength and direction
Solar Radiation
Visible waveband radiance and irradiance measurements in the atmosphere
Horizontal spatial co-ordinates
Date and time
Air temperature
Wind strength and direction
Solar Radiation

BODC idDate/TimeLocationDoc.
12229111998-05-15 12:00:30  — 1998-06-16 08:41 33° 37' 57" S  18° 0' 50" E — 53° 35' 11" N  0° 1' 42" E  View metadata report for BODC series reference number 1222911
1  Multiple instrument types
Horizontal spatial co-ordinates
Date and time
Salinity of the water column
Temperature of the water column
Raw fluorometer output
Horizontal spatial co-ordinates
Date and time
Salinity of the water column
Temperature of the water column
Raw fluorometer output

BODC idDate/TimeLocationDoc.
12229351998-05-15 12:00:30  — 1998-06-16 08:41 33° 37' 57" S  18° 0' 50" E — 53° 35' 11" N  0° 1' 42" E  View metadata report for BODC series reference number 1222935
1  Single-beam echosounder
Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation
Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation

BODC idDate/TimeLocationDoc.
12229231998-05-15 12:00:30  — 1998-06-16 08:41 33° 37' 57" S  18° 0' 50" E — 53° 35' 11" N  0° 1' 42" E  View metadata report for BODC series reference number 1222923
Discrete samples 
52  CTD frame plus rosette samplerTransmittance and attenuance of the water column
Total dissolved inorganic carbon (TCO2) concentration in the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Particulate total and organic nitrogen concentrations in the water column
Nitrite concentration parameters in the water column
Dissolved oxygen parameters in the water column
Total metal concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Phosphate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Bacteria non taxonomy-related biomass expressed as carbon per unit volume of the water column
Phytoplankton taxonomic biomass in water bodies
Visible waveband radiance and irradiance measurements in the water column
Bacteria generic abundance in water bodies
Silicate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Plankton biomass expressed as carbon per unit volume of the water column
Raw light meter output
Plankton abundance per unit volume of the water column
Density of the water column
Raw fluorometer output
Oxygen production and respiration in the water column
Nitrate concentration parameters in the water column
Metadata parameters
Particulate total and organic carbon concentrations in the water column
Chlorophyll pigment concentrations in water bodies
Dissolved metal concentrations in the water column
Light absorption in the water column
Primary production in the water column
77  Expendable BathythermographTemperature of the water column
324  Sample taken from ship's non-toxic supplyCarotenoid and flavenoid pigment concentrations in water bodies
Particulate total and organic nitrogen concentrations in the water column
Phytoplankton taxonomic abundance in water bodies
Bacteria non taxonomy-related biomass expressed as carbon per unit volume of the water column
Phytoplankton taxonomic biomass in water bodies
Bacteria generic abundance in water bodies
Plankton biomass expressed as carbon per unit volume of the water column
Plankton abundance per unit volume of the water column
Particulate total and organic carbon concentrations in the water column
Chlorophyll pigment concentrations in water bodies
Light absorption in the water column
8  Surface water sample collected by a bucket on a ropeTotal dissolved inorganic carbon (TCO2) concentration in the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Bacteria non taxonomy-related biomass expressed as carbon per unit volume of the water column
Phytoplankton taxonomic biomass in water bodies
Bacteria generic abundance in water bodies
Plankton biomass expressed as carbon per unit volume of the water column
Plankton abundance per unit volume of the water column
Oxygen production and respiration in the water column
Chlorophyll pigment concentrations in water bodies
49  WP-2 zooplankton net