Plankton Nets

Introduction to plankton nets
Plankton  NetsPlankton Nets

Plankton  Nets

professional nets are for serious field work and are made of Nitex®, multifilament nylon and canvas. Canvas is more manageable under water than other fabrics and resists snags and tears!

Plankton tow net- First introduced in 1846, these are often considered the most functional and versatile of all plankton collectors. They are usually towed by boats at speeds of 1-3 knots. They consist of a single support hoop, towing bridle, filtration net and straining bucket.
•  Simplest sampling method is vertical sampling, where a short haul is made and nets are generally small in size (1:3 mouth to net length ratio, for instance).
•  Horizontal sampling occurs over a much longer course. You must select equipment in terms of mouth diameter, diameter/ length ratio, mesh, cable depressor etc.
•  Freshwater applications involve a small/medium net (5”- 12” diameter) and often employ vertical hauls.
•  Oceanographic applications need a large /extra large net
(20”-40” diameter) for either vertical or horizontal hauls.

Wisconsin net -Used mainly for vertical sampling and taking plankton concentration averages within several zones or layers of water. Similar to Birge net.

Birge closing net - Has long inlet cone. Used for vertical and horizontal sampling in a specific zone of water. 2 truncated cones connected at their bases. Offers more filtering area than a conical net. Folds, closes at a specific depth.

If you want to do this : Horizontal or vertical tows You may also need this:  7900-A12 line, 426-E50 line weight (for horizontal tows), plankton collection bottles,  Made-To-Order:  Special nets available