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Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah

Under the Economic Transformation Programme (ETP), seaweed production in Malaysia is expected to increase to 150,000 metric tonnes annually by 2020. To achieve this goal, micropropagation and subsequent acclimatization of the micropropagated Kappaphycus alvarezii prior transplantation to the sea far...

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Main Author: Yong, Yoong Soon
Format: Thesis
Language:English
English
Published: 2014
Subjects:
QH540-549.5 Ecology
Online Access:https://eprints.ums.edu.my/id/eprint/42835/1/24%20PAGES.pdf
https://eprints.ums.edu.my/id/eprint/42835/2/FULLTEXT.pdf
https://eprints.ums.edu.my/id/eprint/42835/
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spelling my.ums.eprints.428352025-02-24T02:55:46Z https://eprints.ums.edu.my/id/eprint/42835/ Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah Yong, Yoong Soon QH540-549.5 Ecology Under the Economic Transformation Programme (ETP), seaweed production in Malaysia is expected to increase to 150,000 metric tonnes annually by 2020. To achieve this goal, micropropagation and subsequent acclimatization of the micropropagated Kappaphycus alvarezii prior transplantation to the sea farm is an option to solve the shortage of seedlings. In a series of micropropagation experiments, the highest growth rate was achieved when the K. alvarezii micropropagagules were exposed to a salinity of 30 ± 5 ppt, pH of 8.5 ± 1, and 30 mg/L of Natural Seaweed Extract (NSE). In order to achieve the highest survival rate during transplantation, a study was carried out to determine the optimum conditions for acclimatization of micropropagated K. alvarezii seedlings prior to transfer to the sea farm. In a two-week acclimatization study, K. alvarezii showed the highest growth rate when cultured in seawater enriched with NSE in outdoor nursery tank with complete replacement of culture media daily and 0.40 g/L of culture density. Two batches of acclimatized K. alvarezii were transferred to the sea farm for four weeks and their carrageenan quality, physiochemical profile, minerals and trace elements, and fatty acid compositions were chemically analyzed upon harvesting. As compared to the farm propagated K. alvarezii, micropropagated K. alvarezii showed a significantly higher yield and viscosity of native carrageenan with similar sulphate content profile. Physiochemical profile revealed that both K. alvarezii consists of high ash content, low total protein, and low total lipids. The micropropagated K. alvarezii showed higher compositions of minerals and trace elements, and lower heavy metal contaminants, as compared to farm propagated K. alvarezii. These studies justify the rational and importance of micropropagation and acclimatization in the production of K. alvarezii seedlings. 2014 Thesis NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/42835/1/24%20PAGES.pdf text en https://eprints.ums.edu.my/id/eprint/42835/2/FULLTEXT.pdf Yong, Yoong Soon (2014) Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah. Masters thesis, Universiti Malaysia Sabah.
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic QH540-549.5 Ecology
spellingShingle QH540-549.5 Ecology
Yong, Yoong Soon
Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah
description Under the Economic Transformation Programme (ETP), seaweed production in Malaysia is expected to increase to 150,000 metric tonnes annually by 2020. To achieve this goal, micropropagation and subsequent acclimatization of the micropropagated Kappaphycus alvarezii prior transplantation to the sea farm is an option to solve the shortage of seedlings. In a series of micropropagation experiments, the highest growth rate was achieved when the K. alvarezii micropropagagules were exposed to a salinity of 30 ± 5 ppt, pH of 8.5 ± 1, and 30 mg/L of Natural Seaweed Extract (NSE). In order to achieve the highest survival rate during transplantation, a study was carried out to determine the optimum conditions for acclimatization of micropropagated K. alvarezii seedlings prior to transfer to the sea farm. In a two-week acclimatization study, K. alvarezii showed the highest growth rate when cultured in seawater enriched with NSE in outdoor nursery tank with complete replacement of culture media daily and 0.40 g/L of culture density. Two batches of acclimatized K. alvarezii were transferred to the sea farm for four weeks and their carrageenan quality, physiochemical profile, minerals and trace elements, and fatty acid compositions were chemically analyzed upon harvesting. As compared to the farm propagated K. alvarezii, micropropagated K. alvarezii showed a significantly higher yield and viscosity of native carrageenan with similar sulphate content profile. Physiochemical profile revealed that both K. alvarezii consists of high ash content, low total protein, and low total lipids. The micropropagated K. alvarezii showed higher compositions of minerals and trace elements, and lower heavy metal contaminants, as compared to farm propagated K. alvarezii. These studies justify the rational and importance of micropropagation and acclimatization in the production of K. alvarezii seedlings.
format Thesis
author Yong, Yoong Soon
author_facet Yong, Yoong Soon
author_sort Yong, Yoong Soon
title Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah
title_short Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah
title_full Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah
title_fullStr Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah
title_full_unstemmed Micropropagation, acclimatization and chemical composition of farmed seaweed, Kappaphycus alvarezii, in Sabah
title_sort micropropagation, acclimatization and chemical composition of farmed seaweed, kappaphycus alvarezii, in sabah
publishDate 2014
url https://eprints.ums.edu.my/id/eprint/42835/1/24%20PAGES.pdf
https://eprints.ums.edu.my/id/eprint/42835/2/FULLTEXT.pdf
https://eprints.ums.edu.my/id/eprint/42835/
_version_ 1825161826854240256
score 13.244413

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