Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species

Cryptic diversity study is crucial as the constantly increasing number of cases involving natural ecosystem destruction in the extinction of species. The accurate diagnostic of cryptic species complexes need to be prioritized. Genus Rasbora hit the exact cryptic diversity occurrence as genus Rasbora...

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Main Author:	Aimi Wahidah, Aminan
Format:	Thesis
Language:	English
Published:	2018
Subjects:	QH Natural history
Online Access:	http://ir.unimas.my/id/eprint/30855/1/Aimi%20Wahidah%20Aminan%20ft.pdf
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id	my-unimas-ir.30855
record_format	uketd_dc
spelling	my-unimas-ir.308552023-04-25T05:12:24Z Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species 2018 Aimi Wahidah, Aminan QH Natural history Cryptic diversity study is crucial as the constantly increasing number of cases involving natural ecosystem destruction in the extinction of species. The accurate diagnostic of cryptic species complexes need to be prioritized. Genus Rasbora hit the exact cryptic diversity occurrence as genus Rasbora can be considered as a catch-all group due to the lack of unique diagnostic characteristics per species. For solving the cryptic species in Rasbora, two approaches were used which are morphometric analysis and DNA barcoding analysis. There were 103 samples of Rasbora fishes used to conduct these methods. Altogether 24 morphometric and 11 meristic characteristics used for measurements and counts are recorded to determine the statistically significant differences of characteristics that are able to discriminate particular Rasbora species. Consequently cytochrome c oxidase subunit 1 (COI) gene was utilized as DNA barcode to discriminate the Rasbora specimens with the 33 Rasbora specimen tissues were used. The analyses confirmed the presence of eight Rasbora species. Morphometric analysis was able to determine the characteristics that contribute the most for species characterization which are pre-anal length for morphometric measurement and and pre-dorsal scales for meristic counts data respectively. The phylogenetic relationship of Rasbora was constructed whereby five major clades of Rasbora were created and were successfully mapped forming their own monophyletic clades. R. sumatrana and R. caudimaculata were clustered in the same clades and was found to be partially resolved. Hence, further study is needed to verify both Rasbora species and resolve the phylogenetic study of genus Rasbora from Sarawak. Universiti Malaysia Sarawak(UNIMAS) 2018 Thesis http://ir.unimas.my/id/eprint/30855/ http://ir.unimas.my/id/eprint/30855/1/Aimi%20Wahidah%20Aminan%20ft.pdf text en validuser masters Universiti Malaysia Sarawak(UNIMAS) Faculty of Resource Science and Technology
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	QH Natural history
spellingShingle	QH Natural history Aimi Wahidah, Aminan Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species
description	Cryptic diversity study is crucial as the constantly increasing number of cases involving natural ecosystem destruction in the extinction of species. The accurate diagnostic of cryptic species complexes need to be prioritized. Genus Rasbora hit the exact cryptic diversity occurrence as genus Rasbora can be considered as a catch-all group due to the lack of unique diagnostic characteristics per species. For solving the cryptic species in Rasbora, two approaches were used which are morphometric analysis and DNA barcoding analysis. There were 103 samples of Rasbora fishes used to conduct these methods. Altogether 24 morphometric and 11 meristic characteristics used for measurements and counts are recorded to determine the statistically significant differences of characteristics that are able to discriminate particular Rasbora species. Consequently cytochrome c oxidase subunit 1 (COI) gene was utilized as DNA barcode to discriminate the Rasbora specimens with the 33 Rasbora specimen tissues were used. The analyses confirmed the presence of eight Rasbora species. Morphometric analysis was able to determine the characteristics that contribute the most for species characterization which are pre-anal length for morphometric measurement and and pre-dorsal scales for meristic counts data respectively. The phylogenetic relationship of Rasbora was constructed whereby five major clades of Rasbora were created and were successfully mapped forming their own monophyletic clades. R. sumatrana and R. caudimaculata were clustered in the same clades and was found to be partially resolved. Hence, further study is needed to verify both Rasbora species and resolve the phylogenetic study of genus Rasbora from Sarawak.
format	Thesis
qualification_level	Master's degree
author	Aimi Wahidah, Aminan
author_facet	Aimi Wahidah, Aminan
author_sort	Aimi Wahidah, Aminan
title	Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species
title_short	Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species
title_full	Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species
title_fullStr	Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species
title_full_unstemmed	Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species
title_sort	evaluation of rasbora spp. (teleostei: cyprinidae) from sarawak and its possible cryptic species
granting_institution	Universiti Malaysia Sarawak(UNIMAS)
granting_department	Faculty of Resource Science and Technology
publishDate	2018
url	http://ir.unimas.my/id/eprint/30855/1/Aimi%20Wahidah%20Aminan%20ft.pdf
_version_	1783728395990859776

Evaluation of Rasbora spp. (Teleostei: Cyprinidae) from Sarawak and its Possible Cryptic Species

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