Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia

The behaviour and aggregation of fish in an artificial reef area in Tioman Island, Malaysia, was observed using underwater videography under a combination of shooting conditions. The camera distance and direction relative to the neighboring artificial reef module was varied, and comparisons of image...

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Main Authors:	T. Yoshida, K. Akagi, T . Toda, M.M.R. Kushairi, A.A.A. Kee, B.H.R. Othman
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2010
Online Access:	http://journalarticle.ukm.my/7349/ http://journalarticle.ukm.my/7349/ http://journalarticle.ukm.my/7349/1/01_Md_Yeaminhossain.pdf

id	ukm-7349
recordtype	eprints
spelling	ukm-73492016-12-14T06:43:49Z http://journalarticle.ukm.my/7349/ Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia T. Yoshida, K. Akagi, T . Toda, M.M.R. Kushairi, A.A.A. Kee, B.H.R. Othman, The behaviour and aggregation of fish in an artificial reef area in Tioman Island, Malaysia, was observed using underwater videography under a combination of shooting conditions. The camera distance and direction relative to the neighboring artificial reef module was varied, and comparisons of images with a color filter were made. A distance of 260 cm at a diagonal shooting angle provided a suitable observation of the reef fish around the reef module, and a red color filter provided a truer color replication in morning observations while better images were obtained without the color filter in afternoon light environments. Four criteria were considered to assess the artificial reef effectiveness: total abundance, appearance rate, residence time and feeding frequency. A total of 824 individuals were observed during the study. Mean residence times were shorter for schooling fishes such as Caesio caerulaurea and Liza subviridis, and longer for solitary swimmers like Cephalopholis boenak and Scolopsis bilineatus. Feeding frequency was lower for schooling fishes. A significant correlation was obtained between the feeding frequency and residence time for the high feeding frequency fishes (r = 0.89; p<0.05). The effectiveness of the artificial reef was suggested to be significant in solitary swimmers but less so for schooling fishes. Universiti Kebangsaan Malaysia 2010-06 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/7349/1/01_Md_Yeaminhossain.pdf T. Yoshida, and K. Akagi, and T . Toda, and M.M.R. Kushairi, and A.A.A. Kee, and B.H.R. Othman, (2010) Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia. Sains Malaysiana, 39 (3). pp. 395-403. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol39num3_2010/contentsVol39num3_2010.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	The behaviour and aggregation of fish in an artificial reef area in Tioman Island, Malaysia, was observed using underwater videography under a combination of shooting conditions. The camera distance and direction relative to the neighboring artificial reef module was varied, and comparisons of images with a color filter were made. A distance of 260 cm at a diagonal shooting angle provided a suitable observation of the reef fish around the reef module, and a red color filter provided a truer color replication in morning observations while better images were obtained without the color filter in afternoon light environments. Four criteria were considered to assess the artificial reef effectiveness: total abundance, appearance rate, residence time and feeding frequency. A total of 824 individuals were observed during the study. Mean residence times were shorter for schooling fishes such as Caesio caerulaurea and Liza subviridis, and longer for solitary swimmers like Cephalopholis boenak and Scolopsis bilineatus. Feeding frequency was lower for schooling fishes. A significant correlation was obtained between the feeding frequency and residence time for the high feeding frequency fishes (r = 0.89; p<0.05). The effectiveness of the artificial reef was suggested to be significant in solitary swimmers but less so for schooling fishes.
format	Article
author	T. Yoshida, K. Akagi, T . Toda, M.M.R. Kushairi, A.A.A. Kee, B.H.R. Othman,
spellingShingle	T. Yoshida, K. Akagi, T . Toda, M.M.R. Kushairi, A.A.A. Kee, B.H.R. Othman, Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia
author_facet	T. Yoshida, K. Akagi, T . Toda, M.M.R. Kushairi, A.A.A. Kee, B.H.R. Othman,
author_sort	T. Yoshida,
title	Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia
title_short	Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia
title_full	Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia
title_fullStr	Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia
title_full_unstemmed	Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia
title_sort	evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in tioman island, malaysia
publisher	Universiti Kebangsaan Malaysia
publishDate	2010
url	http://journalarticle.ukm.my/7349/ http://journalarticle.ukm.my/7349/ http://journalarticle.ukm.my/7349/1/01_Md_Yeaminhossain.pdf
first_indexed	2023-09-18T19:49:28Z
last_indexed	2023-09-18T19:49:28Z
_version_	1777406122528866304

Evaluation of fish behaviour and aggregation by underwater videography in an artificial reef in Tioman Island, Malaysia

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