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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

 

Limnocorrals, Microcosms, Enclosures

  • Long-term ecological monitoring
  • Pollution studies
  • Trophic-level manipulation studies
  • Naturalness of conditions

bongo net

bongo net

bongo net


Microcosm Unit Includes:

Microcosms are customized to meet specific requirements of fisheries and plankton investigations.

Free-floating (Pelagic) or Benthic (attached to bottom) models are available up to 5.0 m diameter and 30.0 m deep.

Divers are required to properly deploy enclosures, particularly with Benthic models, where the curtain hems require considerable anchoring to the sediments.

Various curtain materials are available including:

  • polyethylene (opaque $)
  • PVC (clear $$)
  • PETG (clear, semi-rigid film $$$)
  • and Nitex® nylon (specify mesh size, $$$$)

All materials are U.V. stabilized to reduce light degradation. Grommetts are used in the top hem for suspension of the curtain to the floatation frame and in the bottom hem for "pursing" (pelagic) or staking to the sediments (benthic).

The 30.0cm lay-flat bottom hem (benthic) provides enough room for ballast material (chains or sandbags are recommended and not included). Mid bag shape is maintained using 3/4" PVC pipe hoops attached to pipe loops located at 2.0 m intervals.

Floatation rings are constructed from unsinkable, foam filled sections (2.0 m) of corrugated PVC pipe (25 cm diam). The curtain, attached to a PVC octagon is then strapped to the floatation ring.

bongo net



bongo net


Citations

Cruikshank, D.R., J. Penny, and S. Levine. 1983. Construction of large enclosures for experimental studies in lakes., Can. Tech. Rep. of Fish. Aq. Sci., No. 1210. Mazumder, A., D.J. McQueen, W.D. Taylor, and D.R Lean. 1988. Effects of fertilization and planktivorous fish predation on size distribution of particulate phosphorus and assimilated phosphate: Large enclosure experiments., Limnol. Oceanogr., 33(3):421-430. Post, J.R., and D.J. McQueen. 1987. The impact of planktivorous fish on the structure of a plankton community., Freshwater Biology 17:79-89.

 

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P.O.B 98 · 531 Wellington Place · Hope, ID 83836-0098
Phone: 208-290-3820 · Email: hydrobio@aol.com