Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems

Milkfish is one of the most important aquaculture species in Southeast Asia, particularly Indonesia, the Philippines, and Taiwan. The cultivation of milkfish is well-established, although there are problems in the nursery stage, with high occurrence of mortality. Therefore, efforts are required for...

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Main Author:	Rukisah Saleh
Format:	Thesis
Language:	English English
Published:	2015
Subjects:	SH151-179 Fish culture
Online Access:	https://eprints.ums.edu.my/id/eprint/39487/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/39487/2/FULLTEXT.pdf
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spelling	my-ums-ep.394872024-08-13T00:45:16Z Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems 2015 Rukisah Saleh SH151-179 Fish culture Milkfish is one of the most important aquaculture species in Southeast Asia, particularly Indonesia, the Philippines, and Taiwan. The cultivation of milkfish is well-established, although there are problems in the nursery stage, with high occurrence of mortality. Therefore, efforts are required for a sustainable milkfish culture. Factors leading to low survival in the nursery phase stage include water quality, food and feeding, and stocking density. This study is aimed at finding a method for an optimal cultivation system for the mass-production of milkfish juvenile. Four experiments were conducted to achieve the aim. The first experiment was conducted to find out the effects of salinity on the growth and survival of milkfish juvenile. Seven levels of salinities were tested, namely 0, 5, 10, 15, 20, 25, 30 ppt. The result showed that 10 ppt is the optimum salinity levels. The mean body weight, weight gain (WG), Average Daily Gain (ADG), Specific Growth Rate (SGR) were 73.6 mg, 72.8 mg, 1.5 mg/f/day, 9.56%/day, respectively. There were significant differences (P<0.05) than those in the other salinity. The second experiment was conducted to find out the effects of AquamatsTM on growth and survival rate. In this experiment, two methods were used, namely recirculating system with and without AquamatsTM as well as a daily water exchange system with and without AquamatsTM. Throughout the experiment, the optimum salinity level recorded was 10 ppt. The result showed that juveniles kept in a recirculation system tank plus AquamatsTM revealed good growth. Average mean body weight, WG, SGR, FCR were 58.83 mg, 51.50 mg/fish/day, 9.99%/day, 83.07%, respectively. The third experiment was conducted to find out the effects of stocking rate on growth, survival and RNA/DNA ratio of juvenile milkfish. In this experiment, juvenile milkfish were reared in a recirculating system plus AquamatsTM with different stocking rates, namely 8, 12, 16, and 20 juvenile/liter. The result showed growth performance and comparison of RNA/DNA ratio with no significant difference (P>0.05) in 8, 12, and 16 juvenile/liter, and with significant difference (P<0.05) with 20 juvenile/liter of density. The final experiment was conducted to find out the survival and growth of milkfish juvenile cultured under different feeding frequencies. In this experiment four treatments were used, namely one time feeding/days, two time, three time and four time feeding per day. The result showed that juveniles maintained with three time feeding per day exhibited best growth performance. The ADG, SGR and SR were 1.36 mg/fish/day, 9.47%/day and 97.78%, respectively. Based on the results obtained in the present study, the milkfish juvenile reared in salinity 10 ppt, using AquamatsTM, stocking density 16 tails per liter and three time feeding per day could be concluded as an optimal condition to develop technique for milkfish aquaculture. 2015 Thesis https://eprints.ums.edu.my/id/eprint/39487/ https://eprints.ums.edu.my/id/eprint/39487/1/24%20PAGES.pdf text en public https://eprints.ums.edu.my/id/eprint/39487/2/FULLTEXT.pdf text en validuser dphil doctoral Universiti Malaysia Sabah Institut Penyelidikan Marin Borneo
institution	Universiti Malaysia Sabah
collection	UMS Institutional Repository
language	English English
topic	SH151-179 Fish culture
spellingShingle	SH151-179 Fish culture Rukisah Saleh Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems
description	Milkfish is one of the most important aquaculture species in Southeast Asia, particularly Indonesia, the Philippines, and Taiwan. The cultivation of milkfish is well-established, although there are problems in the nursery stage, with high occurrence of mortality. Therefore, efforts are required for a sustainable milkfish culture. Factors leading to low survival in the nursery phase stage include water quality, food and feeding, and stocking density. This study is aimed at finding a method for an optimal cultivation system for the mass-production of milkfish juvenile. Four experiments were conducted to achieve the aim. The first experiment was conducted to find out the effects of salinity on the growth and survival of milkfish juvenile. Seven levels of salinities were tested, namely 0, 5, 10, 15, 20, 25, 30 ppt. The result showed that 10 ppt is the optimum salinity levels. The mean body weight, weight gain (WG), Average Daily Gain (ADG), Specific Growth Rate (SGR) were 73.6 mg, 72.8 mg, 1.5 mg/f/day, 9.56%/day, respectively. There were significant differences (P<0.05) than those in the other salinity. The second experiment was conducted to find out the effects of AquamatsTM on growth and survival rate. In this experiment, two methods were used, namely recirculating system with and without AquamatsTM as well as a daily water exchange system with and without AquamatsTM. Throughout the experiment, the optimum salinity level recorded was 10 ppt. The result showed that juveniles kept in a recirculation system tank plus AquamatsTM revealed good growth. Average mean body weight, WG, SGR, FCR were 58.83 mg, 51.50 mg/fish/day, 9.99%/day, 83.07%, respectively. The third experiment was conducted to find out the effects of stocking rate on growth, survival and RNA/DNA ratio of juvenile milkfish. In this experiment, juvenile milkfish were reared in a recirculating system plus AquamatsTM with different stocking rates, namely 8, 12, 16, and 20 juvenile/liter. The result showed growth performance and comparison of RNA/DNA ratio with no significant difference (P>0.05) in 8, 12, and 16 juvenile/liter, and with significant difference (P<0.05) with 20 juvenile/liter of density. The final experiment was conducted to find out the survival and growth of milkfish juvenile cultured under different feeding frequencies. In this experiment four treatments were used, namely one time feeding/days, two time, three time and four time feeding per day. The result showed that juveniles maintained with three time feeding per day exhibited best growth performance. The ADG, SGR and SR were 1.36 mg/fish/day, 9.47%/day and 97.78%, respectively. Based on the results obtained in the present study, the milkfish juvenile reared in salinity 10 ppt, using AquamatsTM, stocking density 16 tails per liter and three time feeding per day could be concluded as an optimal condition to develop technique for milkfish aquaculture.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Rukisah Saleh
author_facet	Rukisah Saleh
author_sort	Rukisah Saleh
title	Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems
title_short	Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems
title_full	Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems
title_fullStr	Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems
title_full_unstemmed	Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems
title_sort	growth and production efficiency of early juvenile milkfish (chanos chanos forsskal) in different culture systems
granting_institution	Universiti Malaysia Sabah
granting_department	Institut Penyelidikan Marin Borneo
publishDate	2015
url	https://eprints.ums.edu.my/id/eprint/39487/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/39487/2/FULLTEXT.pdf
_version_	1811770517130051584

Growth and production efficiency of early juvenile milkfish (Chanos chanos Forsskal) in different culture systems

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