Revealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks

Incidental capture, or bycatch, of marine species is a global conservation concern. Interactions with fishing gear can cause mortality in air-breathing marine megafauna, including sea turtles. Despite this, interactions between sea turtles and fishing gear—from a behavior standpoint—are not sufficie...

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Autores principales: Janie L. Reavis, H. Seckin Demir, Blair E. Witherington, Michael J. Bresette, Jennifer Blain Christen, Jesse F. Senko, Sule Ozev
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Publicado: Frontiers Media S.A. 2021
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Acceso en línea:https://doaj.org/article/5e2f5ed0fb3345a4a1b3a93e64fb6920
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spelling oai:doaj.org-article:5e2f5ed0fb3345a4a1b3a93e64fb69202021-12-01T02:22:16ZRevealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks2296-774510.3389/fmars.2021.785357https://doaj.org/article/5e2f5ed0fb3345a4a1b3a93e64fb69202021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.785357/fullhttps://doaj.org/toc/2296-7745Incidental capture, or bycatch, of marine species is a global conservation concern. Interactions with fishing gear can cause mortality in air-breathing marine megafauna, including sea turtles. Despite this, interactions between sea turtles and fishing gear—from a behavior standpoint—are not sufficiently documented or described in the literature. Understanding sea turtle behavior in relation to fishing gear is key to discovering how they become entangled or entrapped in gear. This information can also be used to reduce fisheries interactions. However, recording and analyzing these behaviors is difficult and time intensive. In this study, we present a machine learning-based sea turtle behavior recognition scheme. The proposed method utilizes visual object tracking and orientation estimation tasks to extract important features that are used for recognizing behaviors of interest with green turtles (Chelonia mydas) as the study subject. Then, these features are combined in a color-coded feature image that represents the turtle behaviors occurring in a limited time frame. These spatiotemporal feature images are used along a deep convolutional neural network model to recognize the desired behaviors, specifically evasive behaviors which we have labeled “reversal” and “U-turn.” Experimental results show that the proposed method achieves an average F1 score of 85% in recognizing the target behavior patterns. This method is intended to be a tool for discovering why sea turtles become entangled in gillnet fishing gear.Janie L. ReavisH. Seckin DemirBlair E. WitheringtonMichael J. BresetteJennifer Blain ChristenJesse F. SenkoSule OzevFrontiers Media S.A.articlegreen turtleChelonia mydasbehavior recognitioncolor-codingspatiotemporal featuresneural networkScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution DOAJ
collection DOAJ
language EN
topic green turtle
Chelonia mydas
behavior recognition
color-coding
spatiotemporal features
neural network
Science
Q
General. Including nature conservation, geographical distribution
QH1-199.5
spellingShingle green turtle
Chelonia mydas
behavior recognition
color-coding
spatiotemporal features
neural network
Science
Q
General. Including nature conservation, geographical distribution
QH1-199.5
Janie L. Reavis
H. Seckin Demir
Blair E. Witherington
Michael J. Bresette
Jennifer Blain Christen
Jesse F. Senko
Sule Ozev
Revealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks
description Incidental capture, or bycatch, of marine species is a global conservation concern. Interactions with fishing gear can cause mortality in air-breathing marine megafauna, including sea turtles. Despite this, interactions between sea turtles and fishing gear—from a behavior standpoint—are not sufficiently documented or described in the literature. Understanding sea turtle behavior in relation to fishing gear is key to discovering how they become entangled or entrapped in gear. This information can also be used to reduce fisheries interactions. However, recording and analyzing these behaviors is difficult and time intensive. In this study, we present a machine learning-based sea turtle behavior recognition scheme. The proposed method utilizes visual object tracking and orientation estimation tasks to extract important features that are used for recognizing behaviors of interest with green turtles (Chelonia mydas) as the study subject. Then, these features are combined in a color-coded feature image that represents the turtle behaviors occurring in a limited time frame. These spatiotemporal feature images are used along a deep convolutional neural network model to recognize the desired behaviors, specifically evasive behaviors which we have labeled “reversal” and “U-turn.” Experimental results show that the proposed method achieves an average F1 score of 85% in recognizing the target behavior patterns. This method is intended to be a tool for discovering why sea turtles become entangled in gillnet fishing gear.
format article
author Janie L. Reavis
H. Seckin Demir
Blair E. Witherington
Michael J. Bresette
Jennifer Blain Christen
Jesse F. Senko
Sule Ozev
author_facet Janie L. Reavis
H. Seckin Demir
Blair E. Witherington
Michael J. Bresette
Jennifer Blain Christen
Jesse F. Senko
Sule Ozev
author_sort Janie L. Reavis
title Revealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks
title_short Revealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks
title_full Revealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks
title_fullStr Revealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks
title_full_unstemmed Revealing Sea Turtle Behavior in Relation to Fishing Gear Using Color-Coded Spatiotemporal Motion Patterns With Deep Neural Networks
title_sort revealing sea turtle behavior in relation to fishing gear using color-coded spatiotemporal motion patterns with deep neural networks
publisher Frontiers Media S.A.
publishDate 2021
url https://doaj.org/article/5e2f5ed0fb3345a4a1b3a93e64fb6920
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