2. Test Results . 



a. Borers . Teredlnldae were very actiye at this location, 

 infesting panels in every month of the year, which shows that the "breeding 

 season is continuous. Hie attack rated very heavy each year, and the 

 rapidity with which panels 1)6001116 filled or riddled indicates that 

 Teredihidae are extremely destructive. Limnoria showed some evidence 

 of acti-vity throughout the period of the test, tut the attack never rated 

 more than a trace to light except in NovCTiher 19^5^ when a peak rating of 

 medium heavy was attained. Pholadidae also were very active throughout the 

 period of the test. The attack rated very heavy in 19k^ and 19^6, "but 

 appeared less severe in 19^7. The coml)ined attacks of the Teredlnldae 

 and Pholadidae at this location are extremely destructive. Sphaeroma 

 were present, mostly in small numbers, in 19ij'4 and 19^5* 



h. Foulin/;; Organisms . Silt, algae, and invertebrate animals 

 "belonging to 7 phyla contrihuted to fouling of the panels. The latter 

 included sponges, hydroids, encrusting and filamentous Bryozoa, serpulid 

 worms, 'bamacles, miscellaneous nonborlng mollusks, and tvinicates. Of 

 these organisms, hydroids, serpulid worms, euid ■barnacles occurred with 

 outstanding frequency, the last two being exceptionally abundant. 

 Filamentous Bryozoa occurred less frequently, encrusting Bryozoa and 

 tunlcates still less frequently, while the occurrence of the other foims, 

 as well as of the algae, was merely sporadic or occasional. 



5. Eecent Addenda . The Teredlnldae attack was very heavy at this 

 station in 1948 but only moderate the following year. Limnoria were 

 recorded as a trace in both 19^8 and 1949. 



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