Distribution of Chlorinated Hydrocarbon Pesticides and PCBs in the ...

were unsuccessful. Fish hooks or nylon leaders were baited with
pieces of trout and fastened to the hydrowire. No bait was eaten
during five deployments of up to 8 hours each. A cod jig was
used on several occasions in unsuccessful attempts to catch fish
under the ice and near the bottom.
2.6.1 Fvke Net De~lovment .
No fish were caught on the first two sampling trips using
baited hooks and bottom traps. It was decided on the final trip
to use a Fyke net to attempt to catch any fish which might be
feeding on the underside of the ice. A net was constructed by
Research Nets Inc. in Bothnell, Washington with four, 50 x 1 m
ffwingstt extending outward from a 1 m2 central trap. The net was
deployed approximately 75 m from the main hydrohole with the four
arms stretched out along the underside of the ice away from the
central baited trap in an "xW pattern. The contents of the trap
were checked every few days during the ten day deployment. Many
amphipods were obtained feeding on the bait but no fish were
caught.
2.7 Suspended Particulate Matter
Suspended particles in the water column were collected by
in situ pumping of water through precombusted and preweighed
silver filters (Selas Flotronics, 0.8 pm pore diameter). Seastar
pumps, at a flow rate of 150 mL min-1 sampled between 14 and 133
liters at various depths. Millipore Swinnex (R) holders (45 mm
dia) were loaded with precombusted (600" C, 3 hr) , preweighed,
silver filters which were connected to the sampler intake with a
small piece of teflon tubing held in place by hose clamps.
Results from sampling in May showed lower concentrations of
particulate organic carbon than expected from earlier published
data (see Section 4.4) . These differences made it desirable to
obtain water bottle samples for comparison with samples obtained
by in situ pump. A NBS drop sampler (volume 4 L) was used for