g. Chorda ta ( tunica tes )» Tunicates occurred with consider- . 

 a"ble frequency at all locations. They were on k of the i^l control 

 panels and on 19 of the ^1-8 test panels at the Timber Wharf, on 15 of 

 the kl control panels and 56 of the k8 test panels at the "1010 Wharf", 

 on 6 of the 4l control panels and 55 of the hd test panels at the rE 

 Wharf, and on k of the kl control panels and 1? of the ^8 test panels 

 at the Fuel Oil Pier. Botryllus schlosseri occur-red frequently, hut 

 MolRula and Ciona were also identified. 



Aii-8.05 Summary and Conclusions 



1. Installation . Four teat hoards of the panel type installed 

 at different locations at the Peaxl Barhor Naval Shipyard at Peaxl Harhor, 

 Hawaii, on July 5 and h, 19^^^ are still heing operated. The results 



of these tests have heen sxnmnarized to the end of 19^7* 



2. Test Besults . 



a. Borers . Teredinidae were very active at all locations 

 throughout the period covered hy the tests, the breeding season "being 

 continuous and the attacks extremely destructive at each location, with 

 paixels 'becoming filled or riddled within 2 or 5 months. Limnorla also 

 showed more. or less activity at all locations, hut the severity of the 

 attack varied from year to year and at different locations. At the Timber 

 Wharf, the attacks attained peak ratings of medium heavy in 19^5 » 19^6, 

 and 19^7. At the "1010 Wharf", they attained peak ratings of medium 

 heavy in 19^5 and 19^6 and very heavy in 19^7. At the DE Wharf, they 

 attained peak ratings of slight in 19^5 «Jn2. 19^6 and very heavy in 19^7* 

 At the Fuel Oil Pier, they attained peaJc ratings of slight in 19^5* 

 19k6f and 19^7 • Pholadidae likewise showed more or less activity at 

 all locations, varying slightly from year to year. At the Timber Wharf, 

 the attacks rated verj heavy in 19^5^ moderate in 19^6, and none in 

 1947. At the "1010 Wharf", they rated very heavy in 19l<-5 and 19*^6 

 and slight in 19^7. At the Iffi Wharf, they, rated very heavy in 19Wt- 

 and 1946 and heavy in 19^5 and 19^7. At the Fuel Oil Pier, they 

 rated very heavy in 19kh and 19^5 and medium heavy in 19k6 and 19^^. 



h. Fouling Organisms . Silt, algae, and invertebrate 

 animals belonging to 7 phyla contributed to the fouling of the 

 panels. The phyla comprised sponges, hydrolds, encrusting and 

 filamentous Bryozoa, serpulid worms, baxnacles and Corophlum , Jingle- 

 shells and oysters, and tunicates. Of these orgajoisms, serpulid worms 

 and barnacles occurred with the greatest frequency and abundance; 

 hydrolds, J ingle -shells, and filamentotis Bryozoa each occurred with 

 progressively less frequency; while encrusting Bryozoa occurred 

 frequently only at the Timber Wharf. The occurrence of the others, as 

 well as the algae, was merely sporadic or occasional. 



252 



