Acousmed project
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Acousmed Project. Optimization of Survey design by means of indicator geostatistic and Q(s) curves. Marco Barra, Gualtiero Basilone , Angelo Bonanno IAMC-CNR Capo Granitola. Study Area. Sampling period: 2002 - 2008 Month: June – July (October 2004) Surveyed area (NM 2 ): ≈ 2658

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Acousmed Project

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Acousmed project

Acousmed Project

Optimization of Survey design bymeansof indicator geostatistic and Q(s) curves

Marco Barra, Gualtiero Basilone, Angelo Bonanno

IAMC-CNR Capo Granitola


Study area

StudyArea

  • Sampling period: 2002 - 2008

  • Month: June – July (October 2004)

  • Surveyed area (NM2): ≈ 2658

    - 2239 NM2 parallel transect;

    -Max tr. length: 24 NM

    -Min tr length: 7 NM

    - 418 NM2 Zigzag.

  • Intertransect distance: 5 NM

  • Echo sounder:

    - Simrad EK500 (2002-2004)

    - Simrad EK60 (2005-2008)

  • Life stage: adults, juveniles (2004)


Geostatistical analisys indicator

GeostatisticalAnalisys (Indicator)

  • Software used: RGeoS

  • Structural tools: Semivariance

  • Treshold selection criterion:

    • z such that Q(z) ≈ 80% of Q(0)

  • Analyzed dataset:

    • Parallel transect design:

      • Anchovy: ton/NM2 (2002-2008)

      • Sardine: ton/NM2 (2002-2008)


Anchovy summary results

Anchovysummaryresults


Sardine summary results

Sardine summary results


Anchovy variograms

Anchovy variograms


Sardine variograms

Sardine variograms


Spreading area

Spreading Area


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