The Activity of Limnoria tripunctata in Piling Cut-Offs from Naphthalene-Enriched Creosoted Pilings.
Abstract
The objectives of this study were to determine the preservative effectiveness of various percentages of naphthalene-enriched creosote treatments exposed to Limnoria tripunctata attack in the laboratory and in a natural seawater environment; to determine if Limnoria attack is accelerated by exposure in the laboratory and to investigate if there are any seasonal differences in the rate of Limnoria attack in a natural environment where molluscan borers are also present. A total of 38 discs, nine treated with 10% naphthalene creosote, 10 with 28% naphthalene creosote, 10 with 30% naphthalene creosote, and nine with 40% naphthalene creosote were used. The 20% naphthalene creosote wedges showed the most resistance to Limnoria tripunctata attack in the laboratory exposures. In field exposures, all discs were heavily fouled. The dominant fouling organisms were barnacles, mainly Balanus eburneus with lesser amounts of Balanus amphitrite. Traces of hydroid (Tubularia), a few polychaetes (Nereis), and amphipods were also observed. The fouling was scraped off and the discs inspected for the presence of Limnoria tunnels and other marine borers. The discs were then resubmerged. No evidence of any other borers except Limnoria was observed on the discs. Traces of Limnoria attack were found in the field exposures in one of the 20% and one of the 40% naphthalene creosote treated discs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 05, 1980
- Accession Number
- ADA086663
Entities
People
- C. I. Belmore