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

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INSTITUTO DEL MAR DEL PERU

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Presentation transcript:

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

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.

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

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

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 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

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 = Ci Sa /  peces/mn 2 Sa: average echointegrated value (m 2 /mn 2 ) n = ρ A ( number of fish ) Biomasa = n / 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

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

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

Historic series: Geographic distribution of jack mackerel during …

Historic series: Geographic distribution of jack mackerel during …

Historic series: Geographic distribution of jack mackerel during

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

Historic series: Geographic distribution of mackerel during summer in

Acoustic biomass of jack mackerel and mackerel ( ) Thanks…… Biomass (t) Surveys Mackerel Jack Mackerel