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Matecho: An Open-Source Tool for Processing Fisheries Acoustics Data

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Abstract

Matecho is an automated processing method to extract information and perform echo-integration and fish shoal extraction from various scientific echo-sounder sources providing digital acoustic data on fisheries and aquatic ecosystem. The open-source initiative helps foster collaboration and technological transfer. Matecho supports various formats, such as the international standard format for the exchange of fisheries acoustics raw and edited data. The procedure allows the semiautomatic cleaning of echogram data and the application of automatic data filters, i.e., transient noise, attenuated signal and impulsive noise removal and background noise reduction. Echo-integration processing is executed for each depth layer and integrates their characteristics per elementary sampling unit. Sound scattered layers are automatically detected by segmentation from the echo-integrated echogram, and shoals are extracted according to an iterative process of aggregation of filtered echogram echoes that allows, in both cases, the calculation of the ad hoc parameters describing morphological, spatial location and acoustic characteristics of sound scattered layers and shoals. Matecho is open-source software for researchers and provides end users with a user-friendly, free executable program.

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Fig. 1
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Fig. 4

Data source: Pirata 2017 survey on-board the fisheries research vessel Thalassa (Ifremer, Brest, France)

Fig. 5

(Data source: Ecoao survey on-board the Fisheries Research Vessel Antea, IRD)

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Acknowledgements

Matecho was developed by IRD and UMR LEMAR (acoustic platform team) and supported by the PREFACE project funded by the European Commission’s Seventh Framework Program (FP7, 2007–2013) DG Environment under grant agreement number 603521; the software was specifically developed to facilitate acoustic data access for the International Cooperation Partnership Countries of the European Commission with Africa. We would like to thank the IMOS initiative from Australia and all colleagues providing algorithms for the scientific community, including Alex De Robertis et al. (NOAA, USA), Ryan et al. (CSIRO, Australia), and Laurent Berger and Naig Le Bouffant (Ifremer, Brest) for providing Movies3D algorithms and libraries. We thank the crews of the FRV Alis, Antea, Thalassa, and Marion Dufresne for valuable assistance during data collections, especially https://doi.org/10.17600/13110030 and https://doi.org/10.17600/14001400, within the AWA project (01DG12073E) funded by IRD and BMBF.

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Authors and Affiliations

  1. UMR 195 Lemar (Laboratoire des sciences de l’environnement marin CNRS, UBO-IUEM, IRD, Ifremer), Institut de Recherche pour le Développement (IRD), Plouzané, France

    Yannick Perrot, Patrice Brehmer, Jérémie Habasque, Gildas Roudaut, Nolwenn Behagle & Anne Lebourges-Dhaussy

  2. Centre de Recherches Océanographiques de Dakar Thiaroye (CRODT), Pôle de Recherches de Hann, Institut Sénégalais de Recherches Agricoles (ISRA), Dakar, Senegal

    Patrice Brehmer & Abdoulaye Sarré

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  1. Yannick Perrot
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  2. Patrice Brehmer
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  3. Jérémie Habasque
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  4. Gildas Roudaut
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  5. Nolwenn Behagle
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  6. Abdoulaye Sarré
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  7. Anne Lebourges-Dhaussy
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Correspondence to Yannick Perrot.

Electronic supplementary material

Below is the link to the electronic supplementary material.

Matecho User Manual Version 1.1, for detailed procedure and description (PDF 8289 kb)

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Perrot, Y., Brehmer, P., Habasque, J. et al. Matecho: An Open-Source Tool for Processing Fisheries Acoustics Data. Acoust Aust 46, 241–248 (2018). https://doi.org/10.1007/s40857-018-0135-x

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