A Novel Morphometry-Based Protocol of Automated Video-Image Analysis for Species Recognition and Activity Rhythms Monitoring in Deep-Sea FaunaReportar como inadecuado




A Novel Morphometry-Based Protocol of Automated Video-Image Analysis for Species Recognition and Activity Rhythms Monitoring in Deep-Sea Fauna - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1

Institut de Ciències del Mar ICM-CSIC, Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain

2

AgritechLab - Agricultural Engineering Research Unit of the Agriculture Research Council, Via della Pascolare CRA-ING, 16, Monterotondo Rome Italy

3

Japan Agency for Marine-Earth Science and Technology JAMSTEC, 2-15 Natsushima-Cho, Yokosuka, Kanagawa 237-0061 Japan





*

Authors to whom correspondence should be addressed.



Abstract The understanding of ecosystem dynamics in deep-sea areas is to date limited by technical constraints on sampling repetition. We have elaborated a morphometry-based protocol for automated video-image analysis where animal movement tracking by frame subtraction is accompanied by species identification from animals’ outlines by Fourier Descriptors and Standard K-Nearest Neighbours methods. One-week footage from a permanent video-station located at 1,100 m depth in Sagami Bay Central Japan was analysed. Out of 150,000 frames 1 per 4 s, a subset of 10.000 was analyzed by a trained operator to increase the efficiency of the automated procedure. Error estimation of the automated and trained operator procedure was computed as a measure of protocol performance. Three displacing species were identified as the most recurrent: Zoarcid fishes eelpouts, red crabs Paralomis multispina, and snails Buccinum soyomaruae. Species identification with KNN thresholding produced better results in automated motion detection. Results were discussed assuming that the technological bottleneck is to date deeply conditioning the exploration of the deep-sea. View Full-Text

Keywords: automated video-image analysis; deep-sea; behavioural rhythms; mudflows; inertial currents; internal tides; cold-seeps; Sagami bay automated video-image analysis; deep-sea; behavioural rhythms; mudflows; inertial currents; internal tides; cold-seeps; Sagami bay





Autor: Jacopo Aguzzi 1,* , Corrado Costa 2,* , Yoshihiro Fujiwara 3, Ryoichi Iwase 3, Eva Ramirez-Llorda 1 and Paolo Menesatti 2

Fuente: http://mdpi.com/



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