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

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

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

6. Scientifc echo sounder : detect every target that examples finds inside the cone of emitted bundle: fishes, plankton, bottom etc. Estimation biomass Third phase 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 The data base in sheet of calculate (Excel) Measuring of biomass TS = 20 log(L) – b 20 (dB) L: Mean length (cm)  = 4 (  ) 10 TS/10 (m 2 ) ρ = 10000 Ci Sa /  peces/mn 2 Sa: average echointegrated value (m 2 /mn 2 ) n = ρ A ( number of fish ) Biomasa = n / 1000000 W: average weight Biomass (ton) Ending result: Abundance fish Value calculated of TS in-situ or ex-situ Haz acústico Simmonds and Mac Lennan, 2005 Stratification method

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

9. Historic series: Geographic distribution of jack mackerel during 1983-1996 … 1989 198819871986 198519841983 1990 199119921993199419951996

10. Historic series: Geographic distribution of jack mackerel during 1997-2002 … 19971998 1999 2000 2001 2002

11. Historic series: Geographic distribution of jack mackerel during 2002-2009 20022003 20042005 2006 2007 2008 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. Scomber japonicus

13. 1996 1997 1998 1999 2000 2001 20022003 2004 2005 2006 2007 2008 2009 Historic series: Geographic distribution of mackerel during summer in 1996-2009

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