A^5.03 Marine Borers 



1. Teredlnldae . Teredlnldae , Including Teredo navalls , T. 

 ( Lyrodua ) dlegensla , T. ( Lyrodus ) sp., and T. sp. vere very active at 

 the Fuel Facility throughout the period covered hy the test "but showed 

 relatively little activity at the Naval Station. On account of their 

 destructiveness, it vas requested on August 1, 19^6, that a new series 

 lof test hoards he Installed at hoth locations in •vAilch the period of 

 suhmergence would he reduced from 8 to 4 months. This request was made 

 ahout a month after the test hoards at hoth locations were carried away 

 hy high tides and hefore new ones had heen Installed to replace them. 



a. USNSD-1 (U. S. Naval Supply Depot Fuel Facility) . Tere - 

 dlnldae occurred in 26 of the 50 control panels, ranging from minute 

 pits or .embryonic specimens to some up to 20 mm in length, with a maximum 

 of h^O recorded in any one pemel. The hreeding season at this location 

 was. continuous. They occurred in every one of the 50 test panels, the 

 panels hecomlng filled after 8 months' submergence and riddled or 

 destroyed if left in longer. A maximum length of 250 mm was recorded 

 after 15 months' suhmergence. The attack rated very heavy in 19^5 > 

 19^6, and 19^7- 



h. USIO)-2 (U. S. Naval Station) . Teredlnldae occurred In 

 only 5 of the 58 control panels at this location, and nearly all were 

 embryonic. The hreeding season here extended only from March to the 

 middle of August in 19^5* vlth merely minute pits recorded suhsequently 

 and these only in the panel suhmerged from April ik to May 15, 19**'7. 

 Thfey occurred In 17 of the ^5 test panels hut almost always in small 

 numbers. There were none at all in the panels suhmerged from April 5 

 to Septemher 11 in 19^6. The maximum number recorded in emy month was 

 50 in a panel that had heen suhmerged from August 5, 19^ to April 5, 

 19'<-5- The maximum length recorded was 155 mni after 8 months' suhmergence. 

 The attack at this location rated zero or a trace most of the time, hut 

 it attained peak ratings of moderate in 19^5 from an infestation in 

 1910^, and slight in 19^7. 



2. Limnorla . Llmnoria were active at hoth locations throughout 

 the periods of the tests, occurring in all the panels of hoth series 



at hoth locations except in 2 control panels at the Naval Station. At 

 hoth locations, the Llmnoria population increased rapidly after the 

 start of the tests and attained peak ratings of very heavy in 19^5, 

 after the panels had heen exposed for 8 months. The attack at hoth 

 locations was less severe in 19^6; while in 19il-7, it again was very 

 heavy at the Fuel Facility, although ligiht at the Naval Station. 



Aii.5.04 Fouling Agents 



1. Silt. Silt occurred on all except one control and one test 



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