Section 52 

 MAUUS ISLAMD, AKMIRALTI ISLAHDS — UUrDEHTIFrED MYAL BASE 



A52.01 Location of the Test Station and Test Board 



A test "board of the panel type was operated at an unidentified 

 Nayal Base on Meuiiib Island, Admiralty Islands, from February 19 to 

 Octoher 2, 19k6, vhen it was discontinued "because of the inactlvatlon 

 of this Base. Ho information was given as to the location of this 

 test "board, designated as USIK-l, other than that it was at Murzlm 

 Pier. It was reported that no marine borer activity had been evident 

 in this area within the past two years. 



A52 . 02 Hydrographic Data 



The depth of water where the test board was Installed was 

 10 ft. The tidal ran^e was given as follows: mean, l.k ft; diunml, 

 1.7 ftj and spring, 5.0 ft. There was no current. The temperature 

 of the irater at the time the board was Ins'talled was 70° F. With regard 

 to pollution it was stated: "Ten colonies per culture plate; acid- and 

 gas -forming bacteria were present." 



A52.O5 Marine Borers 



1. Teredlnldae . The duration of this test was so brief that 

 only 6 sets of panels were removed, and the fourth control panel 

 never -vTas received. Teredlnldae , including Bankia sp. and Teredo 

 ( Lyrodua ) sp., occurred in 5 control panels. The first peuiel had 

 only 16 minute pits; while the second, submerged for one month, contained 

 210 specimens, some of which were as much as 75 mm long. The tliird 

 panel, submerged for 2 months by mistake, was filled with specimens 

 up to 85 mm long. The fifth panel, also submerged for 2 months by 

 mistake, contained only k specimens, ranging up to 50 mm long, and 

 the sixth contained 50 specimens up to 7 Jnm long. 



The first one of the test panels, submerged for one month, 

 showed only 56 minute pits. The second panel, submerged for 2 months, 

 was filled with specimens up to I05 mm long. The tlalrd and fourth, 

 each submerged for k months, were both riddled with specimens up to 

 180 mm long. The fifth, submerged for 6 months, was riddled with speci- 

 mens up to 250 mm long. While the dijration of the test was entirely 

 too short to eifford an accurate picture of the attack by Teredlnldae , 

 It clearly shows that they were active throughout the period covered 

 by the test, apparently starting to breed about the middle of February 

 anfi rapidly becoming destructive. The breeding season at this loca- 

 tion is probably continuous. The attack rated very heavy, with panels 

 becoming filled or riddled within 2 or 5 months. 



21^5 



