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DEEP-OCEAN BIODETERIORATION OF MATERIALS-PART I. Four Months at 5,640 Feet,
  Technical Report R329, Naval Civil Engineering Laboratory, Port Hueneme, CA, by James S. Muraoka, November 1964, 42 pages.

This is Part I of a series of reports on the biodeterioration of materials in the deep ocean. It covers the data obtained by sampling mud, sea water, and rocks, and data obtained by exposing 1,324 specimens of 492 materials for 4 months on the Pacific Ocean floor at a depth of 5,640 feet. The materials were attached to a Submersible Test Unit (STU). The STU was retrieved in February, 1964, and returned to the Laboratory for tests and analyses.

There were no marine fouling organisms attached to the metal test specimens. Some of the plastic materials were covered with a bacterial slime growth. Cotton rope, Manila hemp rope, and burlap wrappings were deteriorated by microbial activity. Pine test panels and Manila hemp rope were attacked by marine boring organisms (Xylophaga washingtona Bartsch). Various species of fouling organisms were found on rock samples collected from the ocean floor in the vicinity of the STU test site.

Also presented are equipment and methods for obtaining samples and data on oceanographic cruises as well as those used with the STU.

 
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