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Zebra Mussel Trap DesignThis sampling device is used for monitoring planktonic stages of aquatic organisms and larval stages of some invertebrates. It is useful in zebra mussel monitoring because it provides a firm surface of known area on which the settling stage mussels can colonize. The zebra mussel monitoring devices consist of four different sized squares, ranging from 6-12 inches, of plastic separated by 3-cm sections of PVC pipe. The device is anchored using one or more cement blocks depending on current. Steel-coated line should be used. A float is used to suspend the device so that the top plate is about 0.75 meters below the surface of the water. A weight is clamped on the bottom of the device to keep it vertical in the water. On the bottom plate, 3-4 glass microscope slides can be attached using binder clips. These are used to detect the presence of eggs and larvae (veligers). The slides can be checked often and is a quick way to investigate zebra mussel colonization. Replacing the slide can offer continuous monitoring. Placement in a Deep River or lake Placement in a stream or shallow river.
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