* Ostrea (oysters) ocburred oax 2 test panels of the lower test 

 toard at Pier 317-C; on. a single test panel of tlie l^wer test board at 

 the Deperming Station; on 2 test panels of the upper test "board at this 

 Station; and on 5 control panels and 10 test panels of the test "board 

 at the Custom Hoxise Pier, The specimens were mostly few in number; on 

 a control panel, as many as 60 Juvenile specimans were recorded on the 

 test "board at this Pier, The maximum diameter recorded on a test panel 

 was 22 mm. 



Anomia (jingle-shells) occvirred on a single test panel on the 

 lower test "board at the Depenning Pier; on 5 of the test panels of the 

 upper test "board at this Pier; and on 2 of the control panels of the 

 test "board at the Custom House Pier, The greatest number on any one 

 panel was 10. A few specimens of Astyris lunata occurred on a single 

 panel each, of the control and test series of the lower test board at 

 the DepeiTuing Station, and on 2 of the test panels of the test board 

 at the Custcaa House Pier. Ten specimens of Cardium (cockle) and 8 

 unclassified specimens in the family Cardiidae were recorded on 2 of 

 the test panels of the test board at the Custom House Pier. 



f. Chordata (tunicates ). A few colonlea of tunicates 

 occtored on a single panel each of the control and test series on the 

 lower test board at the Deperming Station, and on a single control panel 

 and 6 of the test panels at the Custom House Pier. The aoly forms 

 Identified vere Botryllus schlosseri and Molgula sp. 



A15.C)5 Summary and Conclusions 



1. Installation . Five test boards of the panel type. Installed 

 July 1, 19^, at three different locations at cxr near the Charlestcn 

 Naval Base-, Charleston, South Carolina, are still being operated. The 

 results of these tests have been summarized to the end of ISkf. 



2. Test Results . 



a. Borers. Teredinidae were active at all three locations 

 throughout most of the period covered by the test. Their breeding season 

 started in May and did not last beyond September, October, or November. 

 The attack rated very heavy In the lower test boaard at Pier 517-C, in 

 both of those at the Depermi33g Station-, and in the one at the Custom 

 House Pier. In fact, it was especially heavy in the lower test board 

 at the Depeirming Pier and in the board at the Custom House Pier. In 

 the upper test board at Pier 317-C, however, the maximum attack rated 

 only slight. In contrast to the Teredinidae . Limnoria in general showed 

 little or no activity at moat locations. In the lower test board at 

 Pier 317-C only a single specimen of Limnoria was recorded on one of the 

 control panels, and there was no evidence of any on either of the 2 test 

 boards at the Deperming Station. At the Custom House Pier, however, 

 Limaoria showed more or less activity throughout the period covered by 



Ih 



