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2º AcousMed meeting 20-24 November 2010 Palma de Mallorca, Baleares, Spain

ACOUSMED Task 3:Harmonization and optimisation of the acoustic methodology Subtask 3.1: Target strength equations for anchovy and sardine . 2º AcousMed meeting 20-24 November 2010 Palma de Mallorca, Baleares, Spain. Biomass estimates based on ≠ TS. M. Iglesias, A. Ventero

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2º AcousMed meeting 20-24 November 2010 Palma de Mallorca, Baleares, Spain

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  1. ACOUSMEDTask 3:Harmonization and optimisation of theacousticmethodologySubtask 3.1: Target strengthequationsforanchovy and sardine. 2º AcousMedmeeting 20-24 November 2010 Palma de Mallorca, Baleares, Spain

  2. Biomassestimatesbasedon ≠ TS M. Iglesias, A. Ventero Centro Oceanográfico de Baleares Instituto Español de Oceanografía (IEO), Spain

  3. TS equationsconcerningsardine and anchovy (Mediterraneancountries) .

  4. Past surveys: Re-analysis to check biomass differences • Toapplydifferent TS equations in pastacoustic data fromeacharea and to compare theresultingabundanceestimates. • Biomass estimates (tons)based on: • The TS already applied. • Sardine: -72.6, Anchovy: -71.2 (HCMR) • Sardine: -70.51, Anchovy: -75.3 (CNR- SICILY)

  5. MEDIAS 0609 acousticsurvey • Northwesternmediterranean • Areacharacterizedbymulti-specificity: Sardine and anchovy + otherpelagicspecies. • Same L-W relationship • ANE: 4 polygons • PIL: 3 polygons

  6. Abundance estimates(applying TS from different countries)

  7. Biomass estimates(applying TS from different countries)

  8. Abundance estimates(applying TS from different countries)

  9. Biomassestimates(applying TS from different countries)

  10. MEDIAS 0609 acousticsurvey • Valencia Gulf • AreacharacterizedbySardine and anchovy • Same L-W relationship • 6 polígonos para ANE • 7 polígonos para PIL

  11. Abundance estimates(applying TS from different countries)

  12. Biomassestimates(applying TS from different countries)

  13. Abundance estimates(applying TS from different countries)

  14. Biomassestimates(applying TS from different countries)

  15. TS min & max ANE & PIL

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