PLANKTON NETS

WATER SAMPLERS

SEDIMENT CORERS

PLANKTON SAMPLERS

LABORATORY EQUIPMENT

Light Traps

Larval Fish and Aquatic Invertebrate Light Traps

• Passive sampling of a broad range of planktonic organisms
• Compact, rugged design is suitable for lotic, lentic and hatchery environments
• Modified design includes an alternative light source, collection assembly and floatation device
• Adjustable tube gap width to select for specific organisms or life stages

Unit Includes:

• acrylic tube trapping assembly
  • arranged in a cloverleaf pattern with longitudinal gaps between tubes (25 cm diam., 30 cm length)
  • the gap width can be adjusted within a range of 1.0-15.0 mm for recruitment of specific organisms
    
    
• polycarbonate frame
  • consisting of top and bottom plates fitted together with threaded rods
  • top plate is removable for easy installation of acrylic tubes
  • bottom plate has a cloverleaf shaped hole to allow animals to flow through when trap is retrieved
  • removable foam floatation keeps the sampler at the surface
    
    
• chemical light stick
  • which is held in the center of the trap inside a clear polycarbonate tube
  • light radiates equally in all directions for six hours per stick
    
    
• collection assembly
  • constructed from a 30.0 cm diam. polyethylene funnel and detachable PVC cod end bucket
  • 1.0 liter collection bucket (11.5 I.D., 16.0 cm length) has holes lined with 1000 µm Nitex® nylon to allow passage of water through the cod end
    

Citations

Secor, D.H., J. Hansbarger, 1992. Modification of the quatrefoil light trap for use in hatchery ponds. Prog. Fish. Cult, 54:3, pp 202-205. Floyd, K.B., W.H. Courtenay, and R. D. Hoyt. 1984. A new larval fish trap: the quatrefoil trap. Prog. Fish Cult., 46:216-219. Ulrich, G.W., 1986. Construction of a compact submersible aquatic light trap. Pan-Pac. Entomol. 52:2, pp 144-149. Faber, D.J., 1990. A light trap to sample littoral and limnetic regions of lakes. Verh. Int. Ver. Theor. Limnol. 21:2.