A21 . 05 Summary and Conclusions 



1. Installation . A test "board of the panel type Installed 

 June 10, 19i^l4-, at the U. S. Naval Air Station at Corpus Christi, Texas, 

 to determine the identity ajid prevalence of laarine "borers and fouling 

 organisms, is still "being operated. The results of this test have "been 

 summarized to the end of 19^7 • 



2. Test Besults . 



a. Borers . Teredinidae were very active at this location. 

 The maximum "breeding season apparently was limited to t'-e period from 

 Fe'bruary 10 to January 10, although it was shorter in some years. The 

 attack rated very heavy each yearj some panels "became filled or riddled 

 within 5 months and others in k months. Limnoria also showed more 

 or less activity, "but not until April 19^5- The attack appears never 

 to have rated more than low in the slight rating in any year. No 

 trace of Sphaeroma occurred in 19^5' No Pholadidae were recorded. 



"b. Fouling Organisms . Silt, algae, and inverte"brate 

 animals "belonging to 6 phyla contri"buted to the fouling of the panels. 

 The latter included sponges, hydroids, encrusting and filamentous 

 Biyozoa, serpulid worms, "barnacles, and, miscellaneous non"boring mollusks. 

 Of these organisms, "barnacles occurred with "by far the greatest 

 frequency as well as in unusual a"bundance. Hydroids, encrusting 

 Bryozoa, serpulid worms, oysters, filamentous Bryozoa, £ind mussels, 

 arranged in the order of decreasing frequency, also were important 

 fouling organisms. The occurrence of the other forms as well as the 

 algae, was merely sporadic or occasional. 



5. Recent Addenda . The attack "by Teredinidae was very heavy in 

 "both 19lj^ and 19k9, and the Limnoria attack was rated as slight in 

 "both these years. 



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