Accession Number:

ADA604764

Title:

Biosecurity Management of Submarine Niche Areas: the Effect of Water Pressure on Biofouling Survival

Descriptive Note:

Technical rept.

Corporate Author:

DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION FISHERMANS BEND (AUSTRALIA) MARITIME DIV

Personal Author(s):

Report Date:

2014-01-01

Pagination or Media Count:

30.0

Abstract:

This study showed that exposure to pressure change has a minimal impact on the survival of common biofouling taxa however, fouling taxa survival may be adversely impacted by declining local water quality. Survival was evident across all water pressure treatment regimes, although the 48 hour treatment Trial 3 130 kPa, 48 hours, 4 pressure cycles resulted in decreased survival compared to both 24 hour treatments Trial 1 130 kPa, 24 hours, 2 pressure cycles and Trial 2 200 kPa, 24 hours, 2 pressure cycles. Whilst the study resulted in some mortality of the fouling taxa, significant survival of the fouling taxa was still recorded, thus showing water pressure change to be insufficient as a control mechanism. Based on the results of the current study, a sole reliance on the effects of water pressure change during operational diving and surfacing manoeuvres is not recommended as a niche area fouling mitigation strategy for submarines and consideration of other mitigation strategies is required to ensure biofouling is controlled to reduce operational impacts and biosecurity risks.

Subject Categories:

  • Biology
  • Submarine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE