Figure 36. Close-up view of a microscope slide with hydroid growth. 



SUMMARY OF FINDINGS 



1. Large gooseneck barnacles were found attached to the polyethylene rope floating 

 on the surface. Hydroids were also found on the rope from the surface to the bottom 

 in trace to moderate amounts. A round worm was found on the surface of a concrete 

 sinker. 



2. Attachment organisms such as hydroids and Tubularia sp. were found In small 

 amounts on certain metal specimens and on all of the nonmetallic specimens. A 

 single sea anemone was found securely attached to a metal test panel. Typical 

 fouling organisms found in shallow water, such as bryozoa, barnacles, and tunicates, 

 were not found attached to any of the test panels. 



3. Two species of marine borers, identified as Xylophago washingtona Bartsch and 

 Xylophaga duplicate Knudsen, were found in wood specimens. These borers were 

 responsible for the deterioration of the following materials: (1) wood; (2) plastic 

 rods (area under the wood bait pieces) such as Delrin, nylon, polycarbonate. Teflon, 

 cellulose acetate, polyethylene, acrylics, and polystyrene; (3) vinyl tubes; (4) manilo 

 rope specimens; and (5) cellulose acetate butyrate sheet. 



44 



