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PATTERNS OF RECRUITMENT AND DEVELOPMENT OF BIOFOULING AT EUROPEAN AQUACULTURE FACILITIES PowerPoint PPT Presentation


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PATTERNS OF RECRUITMENT AND DEVELOPMENT OF BIOFOULING AT EUROPEAN AQUACULTURE FACILITIES. Simone Dürr ,

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PATTERNS OF RECRUITMENT AND DEVELOPMENT OF BIOFOULING AT EUROPEAN AQUACULTURE FACILITIES

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Patterns of recruitment and development of biofouling at european aquaculture facilities l.jpg

PATTERNS OF RECRUITMENT AND DEVELOPMENT OF BIOFOULING AT EUROPEAN AQUACULTURE FACILITIES

Simone Dürr,

J. Thomason, D. Watson, D. Beaz, E. Bergtun, R. Breur, J. Cebria, J. Davenport, D. Fowler, C. Hough, J. Icely, A. Lane, J. Maguire, A. Manjua, M. Marhuenda, K. Maroni, J. McElwee, H. Mortensen, D. Murphy, J. Murphy, J. Newman, A. Pereira, J. Power, S. Prieto, J. Watters, P. Willemsen

School of Biology

University of Newcastle upon Tyne, UK


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CRAB

  • CRAB: Collective Research in Aquaculture Biofouling

    • Objective: non-toxic antifouling strategies for the European Aquaculture Industry

www.crabproject.com


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Pan-European Fouling Baseline at Aquaculture Facilities

  • Biofouling Pressure:

    • Defining the problem: Type, Extent, Timing of Biofouling at European Aquaculture Sites

  • Benchmark antifouling strategy performance

  • Prediction for applicability of CRAB tested antifouling strategies at other sites


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Baseline Study in CRAB

  • 2 Experiments conducted directly at farm sites

    • Recruitment

    • Succession

  • Start of experiments at 11 aquaculture sites in Europe in Feb ‘05

  • Ongoing work

  • Preliminary results presented

  • End of experiments in May ‘07


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Experimental Set-up (centrally, UNC)

  • Recruitment: n=10

  • Succession: n=50, reduction by 10 every 6 months

  • Depth 2 m

Settlement panel, 20x20 cm², PVC


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Baseline Assessment (industry workers)

  • Monthly

  • Digital photography

  • Wetweight

  • Height of fouling


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Image and Data analysis (centrally, UNC)

  • Image analysis of digital photos using Image J and stereological principles

  • Calculation of total cover, diversity H’ (Shannon Index), number of species S

  • Statistical analysis:

    • ANOVA

    • ANOSIM

    • SIMPER


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Results

  • Presented here

    • Recruitment: Present/Absent data of the major fouling groups for 11 sites for 1 year

    • Succession: communities of all sites as MDS plot for 4 assessments

    • Wetweight: end of fouling season in Nov


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Recruitment

Algae

September 05

November 05

December 05

March 05

January 06

Feb 05

October 05

August 05

April 05

June 05

July 05

May 05

Barnacles

Mussels

Tubeworms

Ascidians

Hydroids


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Developing Communities in May ’05

ANOSIM Global R: 0.802


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Developing Communities in August ’05

ANOSIM Global R: 0.993


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Developing Communities in November ’05

ANOSIM Global R: 0.907


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Developing Communities in February ‘06

ANOSIM Global R: 0.959


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Developing Communities Wetweight Nov ‘05

B

C

D

A

A

E

20x20 cm² panel

F = 277.85

p < 0.0001

N

S


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- Diatoms/algae recruiting all year at most sites(not at northern sites)

- Hydroids at many sites

  • Calcareous tubeworms at Irish Sites in late spring and summer

  • Mediterranean Site from summer to autumn

  • Ascidians at Southern Sites from April, some in winter

  • At British Isles Sites in summer and winter

- Mussels at N-Norway in summer

- at Irish Sites in late spring and summer

- Barnacles recruit almost all year round at intertidal site

- 1 spatfall at some sites

- 2 spatfalls in N-Norway

Conclusions Recruitment


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After 6 months - 2 Irish and N-Norway Site - Blue Mussels

9 months - all Irish Sites – Blue Mussels

Change in N-Norway

After 6 months - Scottish Site –tunicates

N-Norway later

Northern Sites - first Ectocarpus sp -

Stays on in S-Norway

Southern Sites – all year - soft-tube forming amphipods and polychaetes

Southern Intertidal Site - diatoms first - then crustose coralline red algae

Conclusions Succession


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Conclusions 1st year

  • Fouling on short-term immersed equipment, infrastructure or stock is different from long-term immersed

  • Weight of fouling as problem for equipment and infrastructure depends on dominant fouling species at site

  • Site and duration of immersion is important when choosing an antifouling strategy

  • Need 2nd year results for confirmation and to complete picture


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Acknowledgements

  • Thanks for the enthusiasm and effort of the CRAB SMEs; without their help this study would not be possible

  • Financed by EC contract COLL-CT-2003-500536-CRAB (Collective Research, FP6)

  • www.crabproject.com

  • Contact: [email protected]


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