Top Left: Action photo of the 'Sand Flea'. This PIT tag harvesting device, designed and constructed by Tom Campbell, was used to recover regurgitated PIT tags on the Caspian Tern colony on Rice Island, August 1998. The top 4 inch layer of the sandy colony substrate was lifted up the conveyor belt and dumped over the top on a series of screens as shown. The machine mechanically agitated the deposited material using a hydraulically motor powered from a backhoe (at left). Pit-tagged sized material filtered down to the bottom of three crowned screens, where the agitation process rolled them into a gutter along each side for recovery by magnet. Sand passed out through the bottom (Photo by RDL).
Top Right: Shows the Research Vessel Quinnat being lifted for dry dock and engine replacement at the new Astoria Port Facility in October of 2004 (photo by RDL).
Lower Left: Photo shows the research vessel Electric Barge with the RV Sculpin tied along side. A 2-coil PIT tag antenna is being positioned for attachment to the cod end of the large pair trawl (Photo by RDL).
Lower Right: Pt. Adams staff load a large pair trawl net onto the research vessel Murrelet.
