Turtle hearing classification for turtle excluder devices design

The process of reducing the accidental capture and subsequent mortalities of sea turtles in regional captured fisheries through the use of Turtle Excluder Device (TED) has been extremely important. The objectives of this study is to determine the hearing ability for Green Turtle (Chelonia Midas), id...

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Main Author:	Yudhana, Anton
Format:	Thesis
Language:	English
Published:	2011
Subjects:	T Technology (General)
Online Access:	http://eprints.utm.my/id/eprint/26394/1/AntonYudhanaPFKE2011.pdf
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id	my-utm-ep.26394
record_format	uketd_dc
spelling	my-utm-ep.263942018-05-27T06:35:14Z Turtle hearing classification for turtle excluder devices design 2011 Yudhana, Anton T Technology (General) TK Electrical engineering. Electronics Nuclear engineering The process of reducing the accidental capture and subsequent mortalities of sea turtles in regional captured fisheries through the use of Turtle Excluder Device (TED) has been extremely important. The objectives of this study is to determine the hearing ability for Green Turtle (Chelonia Midas), identify the green turtle and fish behavior on various sound exposures, and determine the specification of TED using underwater sound technique. Auditory Brainstem Response system is used to identify the hearing threshold of the turtle. The measurements were performed at Turtle and Marine Ecosystem Center (TUMEC) Terengganu, Perak, and Melaka Malaysia. It was conducted at a turtle tank by employing click and tone stimulus. Turtle ages of 2 years, 5 years, 9 years, and 30 years were deployed. The measured data were analyzed in time and frequency domains. It is found that the green turtle has a hearing ability in the range of 50 Hz to 1200 Hz. The results showed that turtle hearing sensitivity is about 300 Hz to 500 Hz. Also, the measurement of ambient noise in the life habitat has been conducted. The measurements were divided into 3 different distances from the sea shore: 200 m, 400 m, and 800 m and within 3 different sea depth: 2 m, 5 m, and 10 m for each point, respectively. The frequency and maximum magnitude of ambient noise are found to increase as the depth increased. Finally, the behavior of the turtle and fish towards the emitted sound has been observed. A group of signals that dispel turtles have been determined. The types of signals are Low and High Frequency Modulation, white noise, and sinusoidal signal. These signals do not give any respond to the fish. Therefore, this information is very useful in the development of TED using sound. 2011 Thesis http://eprints.utm.my/id/eprint/26394/ http://eprints.utm.my/id/eprint/26394/1/AntonYudhanaPFKE2011.pdf application/pdf en public phd doctoral Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Yudhana, Anton Turtle hearing classification for turtle excluder devices design
description	The process of reducing the accidental capture and subsequent mortalities of sea turtles in regional captured fisheries through the use of Turtle Excluder Device (TED) has been extremely important. The objectives of this study is to determine the hearing ability for Green Turtle (Chelonia Midas), identify the green turtle and fish behavior on various sound exposures, and determine the specification of TED using underwater sound technique. Auditory Brainstem Response system is used to identify the hearing threshold of the turtle. The measurements were performed at Turtle and Marine Ecosystem Center (TUMEC) Terengganu, Perak, and Melaka Malaysia. It was conducted at a turtle tank by employing click and tone stimulus. Turtle ages of 2 years, 5 years, 9 years, and 30 years were deployed. The measured data were analyzed in time and frequency domains. It is found that the green turtle has a hearing ability in the range of 50 Hz to 1200 Hz. The results showed that turtle hearing sensitivity is about 300 Hz to 500 Hz. Also, the measurement of ambient noise in the life habitat has been conducted. The measurements were divided into 3 different distances from the sea shore: 200 m, 400 m, and 800 m and within 3 different sea depth: 2 m, 5 m, and 10 m for each point, respectively. The frequency and maximum magnitude of ambient noise are found to increase as the depth increased. Finally, the behavior of the turtle and fish towards the emitted sound has been observed. A group of signals that dispel turtles have been determined. The types of signals are Low and High Frequency Modulation, white noise, and sinusoidal signal. These signals do not give any respond to the fish. Therefore, this information is very useful in the development of TED using sound.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Yudhana, Anton
author_facet	Yudhana, Anton
author_sort	Yudhana, Anton
title	Turtle hearing classification for turtle excluder devices design
title_short	Turtle hearing classification for turtle excluder devices design
title_full	Turtle hearing classification for turtle excluder devices design
title_fullStr	Turtle hearing classification for turtle excluder devices design
title_full_unstemmed	Turtle hearing classification for turtle excluder devices design
title_sort	turtle hearing classification for turtle excluder devices design
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2011
url	http://eprints.utm.my/id/eprint/26394/1/AntonYudhanaPFKE2011.pdf
_version_	1747815465699246080

Turtle hearing classification for turtle excluder devices design

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