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Acoustic Evaluation of Jack Mackerel by IMARPE: Hydroacoustic Methodology and Geographic Analysis

This study presents the acoustic evaluation of jack mackerel conducted by IMARPE using hydroacoustic methods, echo sounders, and GIS analysis for biomass estimation. The process involves data collection, processing, interpolation, and geographic distribution analysis. The results provide insights into the abundance and distribution of Pacific jack mackerel and mackerel in Peruvian waters during different time periods.

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Acoustic Evaluation of Jack Mackerel by IMARPE: Hydroacoustic Methodology and Geographic Analysis

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  1. Instituto del Mar del Perú Acoustic evaluation of the resource jack mackerel carried out by IMARPE Unidad de Tecnología de Detección - UTD

  2. What we know about the jack mackerel ?… Evaluation…… Hydroacoustics .... ... Is a direct method for assessment of fish through the propagation of sound through the detection and quantification of marine organisms and water.

  3. Methodology: Acoustic sampling Scientifc echo sounder EK 60 RESEARCH VESSEL ESDU R/V José Olaya Balandra Frequency 120 , 38 y 200 kHz R/V Humboldt PERU Systematic parallel trajectories

  4. How we processed the acoustic data ? Data processed RAW Data Transmision RAW V 4.6 Echoview Ethernet Scientifc echo sounder Workstation Making algorithms Software analysis and modelation of data First phase Acoustic bitacora (38 y 120 kHz) Discrimination of RAW data Cross of data data the fashion of regions and cells Echotracecharacteristics jurel , caballa… etc. The data are ordinate according to frecuencies capture environment

  5. Distribution of resources Ending result : Geographic distribution Second phase Acoustic bitacora 38, 120 y 200 kHz Interpolator Software of data JUREL Acoustic data were interpolated using surfer GRID for species The data acoustic were rounded in eco integrados value for species. Method KRIGING 0 Rounded areas for ESDU 0 0 Checking of GRID in Knots

  6. Estimation biomass Stratification method Scientifc echo sounder: detect every target that examples finds inside the cone of emitted bundle: fishes, plankton, bottom etc. Third phase Haz acústico Acoustic bitacora 38, 120 and 200 kHz The data are taken to an Geographic Information System(GIS), in order to accomplish a geographic analysis to the data with the aim of obtaining an orderly data base Value calculated of TS in-situ or ex-situ Simmonds and Mac Lennan, 2005 Measuring of biomass TS = 20 log(L) – b20(dB) L: Mean length(cm)  = 4 () 10TS/10(m2) ρ = 10000 Ci Sa /peces/mn2 Sa: averageechointegratedvalue(m2/mn2) n = ρ A (number of fish) Biomasa = n <W> / 1000000 W: averageweight Biomass(ton) The data base in sheet of calculate (Excel) Ending result: Abundance fish

  7. Use of the Sonar Pelagic trawl Detection of schools Not detected for echo sounder Greater probability In the success of the capture Not detected School of fish Stop Acoustic sampling route School NOT detected Detected school Representative sampling

  8. Scientific name: Trachurus picturatus murphyi Name in English: Pacific jack mackerel Geographical Distribution: From the Galapagos Islands (Ecuador) to Talcahuano (Chile) Localization of the fishery in Peru: Paita, Parachique, San José and Callao. Results Trachurus murphyi

  9. Historic series: Geographic distribution of jack mackerel during 1983-1996 … 1989 1988 1987 1986 1985 1984 1983 1986 1989 1996 1995 1994 1993 1992 1991 1990 1990 1996

  10. Historic series: Geographic distribution of jack mackerel during 1997-2002 … 1999 1999 1999 1998 1998 1998 1998 1997 1999 2001 2001 2001 2000 2000 2000 2000 2000 2002

  11. Historic series: Geographic distribution of jack mackerel during 2002-2009 2005 2005 2005 2004 2003 2003 2003 2002 2006 2008 2008 2008 2007 2007 2006 2006 2006 2009

  12. Scientific Name: Scomber japonicus English Name: Pacific Mackerel Geographical Distribution: From Manta (Ecuador) to Valparaiso (Chile) Localization of the fishery in Peru: Paita, Chimbote and Callao. Scomberjaponicus

  13. Historic series: Geographicdistribution of mackerelduringsummer in 1996-2009 1996 1997 2000 1998 1999 2001 2003 2002 2008 2004 2007 2005 2006 2009

  14. Acoustic biomass of jack mackerel and mackerel (1998-2009) Mackerel Jack Mackerel Biomass (t) Surveys 1983-1998 Thanks……

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