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PLANKTON NETS

Simple Plankton Nets
Closing Plankton Nets
Bongo Plankton Nets
Multi-Net (Tucker) Trawl
Student Plankton Nets
Stream Sampling Nets

WATER SAMPLERS

Horizontal Water Samplers
Vertical Water Samplers
Student Water Samplers
Secchi Disks
Limnology Field Kits

SEDIMENT CORERS

Universal Percussion Corer
Gravity Corer
Russian Peat Borer
Piston Interface Corer
Large Bore Sediment Sampler
Pore-Water Sampling
Extension Rods and Percussion
Hammer
Core Extruding Apparatus
Discrete Point Piston Corer

PLANKTON SAMPLERS

Plankton Traps
Haney Grazing Chambers
Light Traps
Limnocorrals, Microcosms, Enclosures

LABORATORY EQUIPMENT

Utermoehl (Phytoplankton) Sedimentation Chambers
Folsom Plankton Sample Splitter
Motoda Plankton Sample Splitter
Zooplankton Counting Trays

 

MULTIPLE NET MID-WATER (TUCKER) TRAWL:

  • multi-net trawlDesigned for deep oblique tows where up to three replicate nets can be sequentially operated by a double release mechanism
  • 1.0 m x 1.4 m galvanized and stainless steel construction
  • lower pipe is treaded and capped at both ends where lead ballast bars (approx 60 kg., not included) can be inserted
  • three plankton nets 1.0 m x 1.4 m x 4.0 m x 333 micron with heavy reinforced net cowling positions nets at 45 degree angle during fishing which results in an effective fishing area of 1.0 square meter)
  • cast bronze double release mechanism and two 1.0 kg. split messengers, wire stop
  • three 2-pc PVC cod end assemblies
  • spares kit
  • complete: Approx Cost. $6,700

multi-net trawl

Other frame sizes include:

  • 0.5 m x 0.7m
  • 1.4 m x 2.0m

Call for quote.   


Unit Includes:Multi-Net Trawl

  • galvanized and stainless steel opening and closing frame
  • mouth opening 0.25, 1.0, or 2.0 square meter effective fishing area
  • three plankton nets; available in standard Nitex(r) sizes
  • three, 2-piece PVC collecting buckets lined with specified mesh
  • cast bronze and stainless steel double release mechanism with two 1.0 kg messengers
  • lead weight ballast

  

General Procedure:

  • Multi-Net Trawl nets # 2 & 3 are secured in the closed position to upper frame member by lanyards that snap into the double release mechanism
  • weighted messenger # 1 actuates the opening of plankton net # 2 and closure of plankton net # 1
  • weighted messenger # 2 actuates the opening of plankton net # 3 and closure of plankton net # 2

    

Options:

  • custom sizes and modifications
  • single and double net configurations
  • extra buckets, nets, and messengers

Notes:

Main limitation: Net #1 open upon deployment: Net #3 open upon recovery.

Very reliable and cost effective sampling as compared to “Mock-Ness” and Bongo net systems. No obstruction of the sampling area during deployment. Plankton nets are available in a variety of Nitex nylon mesh sizes (< 1000 microns) and knotless nylon meshes (< 10 cm)

TUCKER TRAWL MULTI-NET MID WATER PLANKTON NET PRICE LIST (US$)

TUCKER TRAWL PLANKTON NET, NITEX NYLON, TRIPPLE STICHED, DOUBLE REINFORCED COLLARS AND NET CORNERS, GROMMETTED COLLARS X 10 CM INTERVALS, HEAVY DUTY NET COWLING (COMPENSATES FOR 45 DEG. FISHING ANGLE, ATTACHMENT HARDWARE, COMPLETE

TRAWL MOUTH OPENING (SQ. METER)

.25

1.0

2.0

MOUTH WIDTH X LENGTH (CM)

50 X 70

100 X 140

140 X 200

STANDARD NET LENGTH (CM)

200

400

600

MESH SIZE (MICRONS)

TUCKER TRAWL NET PRICE ONLY (US$)

150

200
550

250
950

600
1560

200

200
525

250
950

600
1500

250

200
525

250
950

600
1500

333

200
490

250
900

600
1350

500

200
490

250
900

600
1350

750

200
490

250
900

600
1350

1000

200
490

250
900

600
1350

TUCKER TRAWL FRAMES, STANDARD OBLIQUE TOWING ASSEMBLY, GALVINIZED AND SS CONSTRUCTION, LOWER PIPE W/ THREADED CAPS FOR BALLAST INSERTION (BALLAST LOCALLY AVAILBLE), 2-PT SS BRIDLE, NET FRAME COMPRESSION LOOPS, NET ATTACHEMNT HARDWARE, COMPLETE  (USED WITH SINGLE OR DOUBLE RELEASE MECHANISM LISTED BELOW)

NEW…VERTICAL HAUL TUCKER TRAWL FRAME, USED TO RECOVER DISCRETE SAMPLES OF THE HYPOL-META-EPILIMNION IN A SINGLE HAUL, ALL SS CONSTRUCTION GRAVITY ACTIVATED SLIDING BARS ON A SQUARE TUBING FRAME, 4-PT SS BRIDLE, BALLAST/ROPE LINES (BALLAST NOT INCLUDED) COMPLETE  (USED WITH SINGLE OR DOUBLE RELEASE MECHANISM LISTED BELOW)

TRAWL MOUTH OPENING (SQ. METER)

.25

1.0

2.0

MOUTH WIDTH X LENGTH (CM)

50 X 70

100 X 140

140 X 200

TUCKER TRAWL FRAME PRICE

950

1450

2500

NEW VERTICAL HAUL TT FRAME PRICE

1250

1800

n/a

RELEASE MECHANISMS AND MESSENGERS

1. DOUBLE RELEASE MECHANISM. MESSENGER ACTUATED CAST BRONZE, HEAVY DUTY,
WIRE STOP, TWO-EA CAST BRONZE SPLIT MESSENGER X 1000 GM, COMPLETE: $110

2. SINGLE RELEASE MECHANISM. MESSENGER ACTUATED, CAST BRONZE, HEAVY DUTY,
WIRE STOP, ONE-EA CAST BRONZE SPLIT MESSENGER X 1000 GM, COMPLETE: $795

MESSENGER, CAST BRONZE, 1000GM, SPLIT W/ LANYARD, COMPLETE:

$130 

MESSENGER, CAST BRONZE, 333 GM, SOLID, COMPLETE:

$35 

COD END ASSEMBLIES, 2-PC PVC CONSTRUCTION, LOWER SECTION DETACHABLE WITH LATERAL APERUTRES AND LINED W/ SPECIFIED MESH, ALL COMPUTOR MADE, SS HOSE CLAMP, ANY MESH SIZE AVAILABLE, COMPLETE

STANDARD COD END DIAM. (CM)

11

STANDARD COD END LENGTH (CM)

17

COD END PRICE 

150

(OPTIONAL) EXTENSION ASSEMBLY FOR ABOVE COD END ASSEMBLIES USED TO INCREASE FILTRATION AREA OR RESERVOIR VOLUME ON ABOVE COD END ASSEMBLIES. AVAILABLE IN PERFORATED (SPECIFY MESH SIZE) OR NON PERFORATED FORM, COMPLETE

STANDARD COD END DIAM. (CM)

11

EXTENSION ASSEMBLY LENGTH (CM)

15

EXTENSION ASSEMBLY VOLUME (ML)

1000

EXTENSION ASSEMBLY NON-PERFORATED PRICE 

125

PERFORATED PRICE (SPECIFY MESH)

150

 

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