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General Borer Activity
Marine Growths and Their Effect
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advanced to heavy advanced to light advanced to medium attack unchanged Bankia pallets burrows Chelura attack advanced Chelura in ascendancy Cobra attack advanced Cobra attack initiated Cobra attack showed Cobra borers Cobra—No attack evident Cobra—No evidence control test samples crustacean borers Date of Inspection Details of Reaction encrusting Bryozoa encrusting compound tunicates end section cut evidence of advance evidence of attack heavy stage Immersed inch in diameter infestation juvenile knotwood Lane Cove River largest bore hole light stage Limnoria and Chelura Limnoria attack advanced Limnoria attack initiated lodgment low water mark lower end section Marine growth decreased Marine growth unchanged maximum life span medium stage Middle Harbour months numerous Oregon Timber Sample—referred Parramatta River Port Jackson previous inspection Sample Manly Sample Pyrmont section cut disclosed sets of Bankia showed no evidence simple tunicates Spharoma Sphceroma attack stage of destruction Teredo austini Teredo pertingens timber fibre upper end Water temperature 62