Population Genetics of Tor douronensis in Sarawak – A Revisit
Tor douronensis, known locally as Semah, is one of the valuable resources of Sarawak due to its high nutritional value and demand as game fish. Several molecular studies related to T. douronensis have been carried out and deposited in GenBank including the data collected from Ba Kelalan, Layar and...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universiti Malaysia Sarawak, (UNIMAS)
2015
|
| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/14366/ http://ir.unimas.my/id/eprint/14366/1/Population%20Genetics%20of%20Tor%20douronensis%20in%20Sarawak%20%E2%80%93%20A%20Revisit%20%28abstract%29.pdf |
| _version_ | 1848837633099169792 |
|---|---|
| author | Muhammad Amirul Arib, Md Adzhar Ruhana, Hassan |
| author_facet | Muhammad Amirul Arib, Md Adzhar Ruhana, Hassan |
| author_sort | Muhammad Amirul Arib, Md Adzhar |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | Tor douronensis, known locally as Semah, is one of the valuable resources of Sarawak due to its high nutritional
value and demand as game fish. Several molecular studies related to T. douronensis have been carried out and
deposited in GenBank including the data collected from Ba Kelalan, Layar and Limbang. Although there are
other studies on Tor spp., the data was not available in GenBank, thus there are not included in the analysis. One
fieldtrip to Bakun Dam was carried out on June 2014 with initial aim to assess overall fish diversity. During this
sampling, 11 individuals of T. douronensis were caught, which later subjected to molecular work to investigate
the genetic structure and evolutionary relationship among four of T. douronensis in Sarawak using partial
Cytochrome c oxidase I (COI) mtDNA gene. A fragment of 465 bp of CO1 gene of T. douronensis was
successfully amplified. Based on the phylogenetic trees generated, three clades could be observed namely
Central, Southern, and Northern populations; 1st clade (haplogroup I) from Bakun, 2nd clade (haplogroup II) from
Layar and 3rd clade (haplogroup III) from Ba Kelalan and Ulu Limbang. Overall, there were 13 haplotypes and
none was shared among populations, suggesting low level of inter-population gene flow has been observed. The
small number of migrants per generation (Nm<1.0) among the population indicated that the small populations
were isolated possibly due to large geographical areas. All population had undergone expansion with a large
negative value and significant test of Fu’s F in Bakun population suggested recent expansion. In addition, result
also suggested that all populations did not deviate from evolutionary neutrality. |
| first_indexed | 2025-11-15T06:42:45Z |
| format | Article |
| id | unimas-14366 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T06:42:45Z |
| publishDate | 2015 |
| publisher | Universiti Malaysia Sarawak, (UNIMAS) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | unimas-143662016-11-21T07:30:18Z http://ir.unimas.my/id/eprint/14366/ Population Genetics of Tor douronensis in Sarawak – A Revisit Muhammad Amirul Arib, Md Adzhar Ruhana, Hassan SH Aquaculture. Fisheries. Angling Tor douronensis, known locally as Semah, is one of the valuable resources of Sarawak due to its high nutritional value and demand as game fish. Several molecular studies related to T. douronensis have been carried out and deposited in GenBank including the data collected from Ba Kelalan, Layar and Limbang. Although there are other studies on Tor spp., the data was not available in GenBank, thus there are not included in the analysis. One fieldtrip to Bakun Dam was carried out on June 2014 with initial aim to assess overall fish diversity. During this sampling, 11 individuals of T. douronensis were caught, which later subjected to molecular work to investigate the genetic structure and evolutionary relationship among four of T. douronensis in Sarawak using partial Cytochrome c oxidase I (COI) mtDNA gene. A fragment of 465 bp of CO1 gene of T. douronensis was successfully amplified. Based on the phylogenetic trees generated, three clades could be observed namely Central, Southern, and Northern populations; 1st clade (haplogroup I) from Bakun, 2nd clade (haplogroup II) from Layar and 3rd clade (haplogroup III) from Ba Kelalan and Ulu Limbang. Overall, there were 13 haplotypes and none was shared among populations, suggesting low level of inter-population gene flow has been observed. The small number of migrants per generation (Nm<1.0) among the population indicated that the small populations were isolated possibly due to large geographical areas. All population had undergone expansion with a large negative value and significant test of Fu’s F in Bakun population suggested recent expansion. In addition, result also suggested that all populations did not deviate from evolutionary neutrality. Universiti Malaysia Sarawak, (UNIMAS) 2015 Article PeerReviewed text en http://ir.unimas.my/id/eprint/14366/1/Population%20Genetics%20of%20Tor%20douronensis%20in%20Sarawak%20%E2%80%93%20A%20Revisit%20%28abstract%29.pdf Muhammad Amirul Arib, Md Adzhar and Ruhana, Hassan (2015) Population Genetics of Tor douronensis in Sarawak – A Revisit. Borneo Journal of Resource Science and Technology, 5 (2). pp. 1-15. ISSN 2229-9769 |
| spellingShingle | SH Aquaculture. Fisheries. Angling Muhammad Amirul Arib, Md Adzhar Ruhana, Hassan Population Genetics of Tor douronensis in Sarawak – A Revisit |
| title | Population Genetics of Tor douronensis in Sarawak – A Revisit |
| title_full | Population Genetics of Tor douronensis in Sarawak – A Revisit |
| title_fullStr | Population Genetics of Tor douronensis in Sarawak – A Revisit |
| title_full_unstemmed | Population Genetics of Tor douronensis in Sarawak – A Revisit |
| title_short | Population Genetics of Tor douronensis in Sarawak – A Revisit |
| title_sort | population genetics of tor douronensis in sarawak – a revisit |
| topic | SH Aquaculture. Fisheries. Angling |
| url | http://ir.unimas.my/id/eprint/14366/ http://ir.unimas.my/id/eprint/14366/1/Population%20Genetics%20of%20Tor%20douronensis%20in%20Sarawak%20%E2%80%93%20A%20Revisit%20%28abstract%29.pdf |