Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper

Demand feeding is a new feeding method by which fish can feed themselves. Fish switch on the feeding device when they require food. This method has several advantages because the fish can eat when they are most motivated to feed. The system can thus minimize feed loss and reduce water pollution. Th...

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Bibliographic Details
Main Authors:	Mukai, Yukinori, Tan, Nai Han, Mohammad Seth, Siti Nasihin, Firdaus, Rian Freddie, Chung , Fan Liau
Format:	Conference or Workshop Item
Language:	English
Published:	2013
Subjects:	SH Aquaculture. Fisheries. Angling
Online Access:	http://irep.iium.edu.my/33663/ http://irep.iium.edu.my/33663/1/2-12_Poster_1.pdf

id	iium-33663
recordtype	eprints
spelling	iium-336632013-12-24T04:11:38Z http://irep.iium.edu.my/33663/ Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper Mukai, Yukinori Tan, Nai Han Mohammad Seth, Siti Nasihin Firdaus, Rian Freddie Chung , Fan Liau SH Aquaculture. Fisheries. Angling Demand feeding is a new feeding method by which fish can feed themselves. Fish switch on the feeding device when they require food. This method has several advantages because the fish can eat when they are most motivated to feed. The system can thus minimize feed loss and reduce water pollution. The demand feeding system has been studied for ten years, but so far, there are only a few commercialized feeding devices. Currently, the most urgent issue facing the aquaculture industry in Malaysia is seed production, especially, groupers. This study was conducted to examine juvenile rearing by demand feeding system with brown-marbled grouper Epinephelus fuscoguttatus and orange-spotted grouper, Epinephelus coioides. 10 juveniles were kept in a 500 L round polyethylene tank (nine tanks, 90 fish). The tanks had water running system with water change (90%) every morning. Throughout the experiment, fish were exposed to natural photoperiod. Water temperature was 26.5 – 30.5 °C and salinity was 26-29 ppt. During rearing experiment, the fish were fed with pellets (Otohime EP3, Marubeni Nisshin Feed Co. Ltd.). Three experimental groups, pendulum demand feeder group (PDF, FH221, Aquatic Eco-Systems, Inc.), infrared sensor demand feeder group (IRDF) and automatic feeder group (AF) were set with three replicates. The IRDF consisted of an infrared sensor (infrared light 860 nm) ending in a red pellet-like knob with food container. Both demand feeders (PDF and IRDF) were set to dispense 10-15 pellets when fish activated the trigger (pendulum rod and infrared sensor respectively) located 2 cm below the water surface. The automatic feeder (AF) was set to dispense 130-150 pellets at 08:00 and 17:00 h. The experiment lasted for 20 days. Fish growth rates; total length (TL) and body weight (BW) were compared. Fish growth of three experimental groups of each grouper was obtained. In the experiment of brown marbled grouper, total length of IRDF group was higher than that of PDF group (P<0.05). BW growth rates of three groups were not significant different. In the experiment of orange-spotted, there are no significant differences, but TL and BW growth rates of IRDF group showed higher tendency than that of AF and PDF groups. Therefore, IRDF demand feeding devises are suitable for juvenile rearing of groupers. 2013-02 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/33663/1/2-12_Poster_1.pdf Mukai, Yukinori and Tan, Nai Han and Mohammad Seth, Siti Nasihin and Firdaus, Rian Freddie and Chung , Fan Liau (2013) Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper. In: IRIIE 2013, 20 February 2013, Cultural Activity Centre (CAC), IIUM.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	SH Aquaculture. Fisheries. Angling
spellingShingle	SH Aquaculture. Fisheries. Angling Mukai, Yukinori Tan, Nai Han Mohammad Seth, Siti Nasihin Firdaus, Rian Freddie Chung , Fan Liau Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper
description	Demand feeding is a new feeding method by which fish can feed themselves. Fish switch on the feeding device when they require food. This method has several advantages because the fish can eat when they are most motivated to feed. The system can thus minimize feed loss and reduce water pollution. The demand feeding system has been studied for ten years, but so far, there are only a few commercialized feeding devices. Currently, the most urgent issue facing the aquaculture industry in Malaysia is seed production, especially, groupers. This study was conducted to examine juvenile rearing by demand feeding system with brown-marbled grouper Epinephelus fuscoguttatus and orange-spotted grouper, Epinephelus coioides. 10 juveniles were kept in a 500 L round polyethylene tank (nine tanks, 90 fish). The tanks had water running system with water change (90%) every morning. Throughout the experiment, fish were exposed to natural photoperiod. Water temperature was 26.5 – 30.5 °C and salinity was 26-29 ppt. During rearing experiment, the fish were fed with pellets (Otohime EP3, Marubeni Nisshin Feed Co. Ltd.). Three experimental groups, pendulum demand feeder group (PDF, FH221, Aquatic Eco-Systems, Inc.), infrared sensor demand feeder group (IRDF) and automatic feeder group (AF) were set with three replicates. The IRDF consisted of an infrared sensor (infrared light 860 nm) ending in a red pellet-like knob with food container. Both demand feeders (PDF and IRDF) were set to dispense 10-15 pellets when fish activated the trigger (pendulum rod and infrared sensor respectively) located 2 cm below the water surface. The automatic feeder (AF) was set to dispense 130-150 pellets at 08:00 and 17:00 h. The experiment lasted for 20 days. Fish growth rates; total length (TL) and body weight (BW) were compared. Fish growth of three experimental groups of each grouper was obtained. In the experiment of brown marbled grouper, total length of IRDF group was higher than that of PDF group (P<0.05). BW growth rates of three groups were not significant different. In the experiment of orange-spotted, there are no significant differences, but TL and BW growth rates of IRDF group showed higher tendency than that of AF and PDF groups. Therefore, IRDF demand feeding devises are suitable for juvenile rearing of groupers.
format	Conference or Workshop Item
author	Mukai, Yukinori Tan, Nai Han Mohammad Seth, Siti Nasihin Firdaus, Rian Freddie Chung , Fan Liau
author_facet	Mukai, Yukinori Tan, Nai Han Mohammad Seth, Siti Nasihin Firdaus, Rian Freddie Chung , Fan Liau
author_sort	Mukai, Yukinori
title	Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper
title_short	Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper
title_full	Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper
title_fullStr	Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper
title_full_unstemmed	Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper
title_sort	demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper
publishDate	2013
url	http://irep.iium.edu.my/33663/ http://irep.iium.edu.my/33663/1/2-12_Poster_1.pdf
first_indexed	2023-09-18T20:48:40Z
last_indexed	2023-09-18T20:48:40Z
_version_	1777409846798188544

Demand feeding system for juveniles of groupers, brown-marbled grouper and orange-spotted grouper

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