Fouling in the sea water system of the Marine Sciences Research Laboratory, Logy Bay, Newfoundland

Sergy, Gary A. (1972) Fouling in the sea water system of the Marine Sciences Research Laboratory, Logy Bay, Newfoundland. Masters thesis, Memorial University of Newfoundland.

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Abstract

A survey, by means of direct and x-radiographic examination, was made of fouling in the poly-vinyl chloride seawater system of the Marine Sciences Research Laboratory, Logy Bay, Newfoundland. Fouling was affected by pipe sizes and configurations, water velocities, continuity of flow and temperature. After four years continuous use, the marine growth was not sufficient to significantly retard operation of the system. The piping system itself, was not designed to facilitate cleaning. -- A fungal-bacterial slime film was the first life form observed on new sections of pipe in 1971. The initial dominant macro-foulers were Molgula sp. and Nicolea venustula. -- The communities in horizontal pipes (5.1 cm inside diameter), having had a flow of three and four summer seasons, were studied in detail. Of the 30 species of foulers identified in the pipes, the bivalves Hiatella arctica and Mytilus edulis constituted the greatest mass; however, Molgula sp., Leucosolenia sp., Spirorbis spirillum, Anomia simplex, and Balanus spp. were common. H. arctica were examined for growth. -- Counts were made of the Spirorbis spirillum settled on PVC panels hung in the reservoir.

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