Abstract
Bandicoot rats (genus Bandicota) are distributed widely across the Indomalay biogeographic realm of tropical East Asia. One widely distributed species, the greater bandicoot rat (Bandicota indica), has a disjunct distribution including both north and south of the biogeographic break at the Isthmus of Kra. We compared genetic variation of greater bandicoot rats from north and south of the Isthmus of Kra using mitochondrial cytochrome b (cyt b, 1140 bp) and nuclear interphotoreceptor retinoid binding protein (IRBP, 801 bp) sequences. We found that the greater bandicoot rat (B. indica) is not native to Sundaland, the region south of the Isthmus of Kra. The species was introduced to the region recently as the genetic divergence with other regions is very low and phylogenies of both genes showed Malaysian greater bandicoot rat very closely related to conspecifics from Lao PDR. Haplotype data revealed all individuals from Malaysia are homogenous, which implied that the species was introduced recently. The greater bandicoot rats in Malaysia are so far only reported in the rice producing regions of Kedah and Perlis, but they may be increasing in number and distribution. A more detailed survey on the distribution and population demographics of Malaysian greater bandicoot rats are needed to support a management plan for this invasive species.
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Sequences have been submitted to GenBank, accession numbers in Table 2.
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Acknowledgements
This study was supported by a University of Malaya research grant (BKS031-2017), postgraduate research fund, PPP (PG061-2016A), and the Spanish Research Council (CGL2017-86068-P). We acknowledge University of Malaya for providing funding, facilities, and assistances. We thank the Museum of Zoology of University of Malaya for their permission for data collection and the Department of Wildlife and National Parks Peninsular Malaysia for their authorization. We also thank the staff of Institute of Biological Sciences (ISB), Faculty of Science for their assistance throughout the sample collection. Molecular work was performed at the Animal Genetics and Genome Evolutionary Laboratory, Institute of Biological Sciences, Faculty of Sciences, University of Malaya. A special thanks to the team members during data collection, especially Muhammad Syahmi bin Ibrahim for their help and support.
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Appendix 1
Appendix 1
External measurements (in mm) of greater bandicoot rats from Malaysia with field numbers, haplotype distribution based on cyt b and IRBP, sexes, captured locations and dates and ranges of age; juvenile (J), sub-adult (SA) and adult(A).
Field numbers | Haplotype distribution | Sex | Localities | Trapping date | Age | Morphological data measurements (mm) | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Cyt b | IRBP | Hb | T | E | Hf | Ff | Weight (g) | |||||
ASK1 | Hap 1 | Hap 1 | M | Alor Setar, Kedah | 7/3/2018 | A | 300 | 220 | 28.0 | 52 | 26 | 912 |
ASK2 | Hap 1 | - | F | Alor Setar, Kedah | 7/3/2018 | A | 279 | 224 | 30.0 | 53 | 25 | 838 |
ASK3 | Hap 1 | Hap 1 | F | Alor Setar, Kedah | 7/3/2018 | A | 295 | 193 | 30.8 | 49 | 25 | 686 |
ASK4 | Hap 1 | Hap 1 | F | Alor Setar, Kedah | 8/3/2018 | J | 253 | 203 | 27.4 | 49 | 23 | 460 |
TTP01 | Hap 1 | Hap 1 | F | Tambun Tulang, Perlis | 8/3/2018 | A | 348 | 242 | 28.5 | 54 | 27 | 759 |
TTP02 | Hap 1 | Hap 1 | F | Tambun Tulang, Perlis | 8/3/2018 | A | 302 | 216 | 23.1 | 51 | 25 | 444 |
TTP03 | Hap 1 | - | M | Tambun Tulang, Perlis | 8/3/2018 | SA | 293 | 200 | 25.4 | 48 | 24 | 589 |
TTP04 | Hap 1 | - | M | Tambun Tulang, Perlis | 8/3/2018 | J | 252 | 189 | 22.8 | 51 | 27 | 303 |
TTP05 | Hap 1 | - | M | Tambun Tulang, Perlis | 8/3/2018 | J | 196 | 179 | 23.2 | 50 | 25 | 249 |
TTP06 | Hap 1 | Hap 2 | F | Tambun Tulang, Perlis | 9/3/2018 | J | 214 | 184 | 23.8 | 47 | 22 | 319 |
TTP07 | Hap 1 | Hap 2 | M | Tambun Tulang, Perlis | 9/3/2018 | J | 220 | 172 | 27.1 | 48 | 24 | 218 |
TTP08 | Hap 1 | Hap 2 | F | Tambun Tulang, Perlis | 9/3/2018 | SA | 321 | 184 | 28.3 | 49 | 25 | 578 |
TTP09 | Hap 1 | Hap 1 | M | Tambun Tulang, Perlis | 10/3/2018 | J | 235 | 138 | 27.4 | 49 | 26 | 337 |
TTP010 | Hap 1 | Hap 2 | M | Tambun Tulang, Perlis | 11/3/2018 | J | 238 | 186 | 26.2 | 50 | 24 | 312 |
TTP011 | Hap 1 | Hap 2 | F | Tambun Tulang, Perlis | 12/3/2018 | SA | 287 | 226 | 29.2 | 53 | 25 | 587 |
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Saarani, M.A.F., Leonard, J.A., Md-Zain, B.M. et al. Greater Bandicoot Rats (Bandicota indica) are Not Native to Sundaland Based on Deoxyribonucleic Acid (DNA) Analyses. J Mammal Evol 28, 929–938 (2021). https://doi.org/10.1007/s10914-020-09535-4
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DOI: https://doi.org/10.1007/s10914-020-09535-4