Displaying publications 1 - 20 of 166 in total

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  1. Genetic divergence and evolutionary relationship in Fejervarya cancrivora from Indonesia and other Asian countries inferred from allozyme and MtDNA sequence analyses
    Kurniawan N, Islam MM, Djong TH, Igawa T, Daicus MB, Yong HS, et al.
    Zoolog Sci, 2010 Mar;27(3):222-33.
    PMID: 20192690 DOI: 10.2108/zsj.27.222
    To elucidate genetic divergence and evolutionary relationship in Fejervarya cancrivora from Indonesia and other Asian countries, allozyme and molecular analyses were carried out using 131 frogs collected from 24 populations in Indonesia, Thailand, Bangladesh, Malaysia, and the Philippines. In the allozymic survey, seventeen enzymatic loci were examined for 92 frogs from eight representative localities. The results showed that F. cancrivora is subdivided into two main groups, the mangrove type and the large- plus Pelabuhan ratu types. The average Nel's genetic distance between the two groups was 0.535. Molecular phylogenetic trees based on nucleotide sequences of the 16S rRNA and Cyt b genes and constructed with the ML, MP, NJ, and BI methods also showed that the individuals of F. cancrivora analyzed comprised two clades, the mangrove type and the large plus Pelabuhan ratu / Sulawesi types, the latter further split into two subclades, the large type and the Pelabuhan ratu / Sulawesi type. The geographical distribution of individuals of the three F. cancrivora types was examined. Ten Individuals from Bangladesh, Thailand, and the Philippines represented the mangrove type; 34 Individuals from Malaysia and Indonesia represented the large type; and 11 individuals from Indonesia represented the Pelabuhan ratu / Sulawesi type. Average sequence divergences among the three types were 5.78-10.22% for the 16S and 12.88-16.38% for Cyt b. Our results suggest that each of the three types can be regarded as a distinct species.
    Matched MeSH terms: DNA, Mitochondrial/genetics*
  2. Resurrection of Staurois parvus from S. tuberilinguis from Borneo (Amphibia, Ranidae)
    Matsui M, Mohamed M, Shimada T, Sudin A
    Zoolog Sci, 2007 Jan;24(1):101-6.
    PMID: 17409723
    Two forms of Staurois that are differentiated by body size occur parapatrically in the Crocker Range, Sabah, Borneo. Analyses of a total of 1,499 bp of the mitochondrial cytochrome b, 12S rRNA, and 16S rRNA genes revealed that the two forms could be completely split genetically. The two forms could be also clearly differentiated morphologically, not only by snout-vent length but also by the relative sizes of snout, eye, and finger disk. Comparisons of the two forms with all known species of the genus revealed the large and small forms to be S. tuberilinguis and S. parvus, respectively. The latter species has long been synonymized with the former, but we here consider them to represent different species.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  3. Phylogenetic analysis of hampala fishes (subfamily Cyprininae) in Malaysia inferred from partial mitochondrial cytochrome B DNA sequences
    Ryan JR, Esa YB
    Zoolog Sci, 2006 Oct;23(10):893-901.
    PMID: 17116992
    This study examined 396 base pairs of the mitochondrial cytochrome b gene from 110 individuals belonging to the genus Hampala, a group of freshwater cyprinids that inhabit Southeast Asia. The samples were taken from various locations throughout Sarawak, Sabah, and peninsular Malaysia. The nucleotide sequences were subjected to phylogenetic analyses by using the neighbor-joining, maximum parsimony, and maximum likelihood methods. All three methods revealed the reciprocally monophyletic relationship of Hampala macrolepidota to the other Hampala forms, thus strongly supporting its status as a distinct species. Phylogenetic analysis also discovered the existence of two H. bimaculata lineages endemic to Borneo: (1) a newly identified species from the southern and central part of Sarawak assigned as H. bimaculata Type A and (2) the previously described H. bimaculata from northern Sarawak and the west coast of Sabah assigned as H. bimaculata Type B. However, the status of H. sabana and an intermediate form were not elucidated. The results suggest that the intermediate form from the Tawau population is actually a subpopulation of H. sabana, while the highly divergent intermediate form from Kalabakan could represent a cryptic species. The sharing of H. macrolepidota haplotypes in the southern peninsular Malaysia and southern and central Sarawak samples (Hm1 and Hm2) reflected the recent disconnection of the two regions, during the late Pleistocene. Overall, the partial sequence of the mitochondrial cytochrome b gene was useful for resolving the phylogenetic relationships among Hampala fishes in Malaysia.
    Matched MeSH terms: DNA, Mitochondrial/genetics*
  4. A New Species of Meristogenys (Anura: Ranidae) from Sarawak, Borneo
    Shimada T, Matsui M, Nishikawa K, Eto K
    Zoolog Sci, 2015 Oct;32(5):474-84.
    PMID: 26428726 DOI: 10.2108/zs140289
    A cryptic Bornean torrent frog of the genus Meristogenys, which is divergent genetically and morphologically from all known congeners, is described from mountain streams of western Sarawak, East Malaysia (Borneo). The species occurs sympatrically with the type species of the genus, M. jerboa, but apparently differs from it in adult coloration and larval morphology, such as keratodont formulae and glands in tail fins. Females of the new species possess much larger and fewer eggs than in sympatric M. jerboa, suggesting significantly different reproductive traits between these species. A key to larvae of known species of the genus is provided.
    Matched MeSH terms: DNA, Mitochondrial/genetics*
  5. Two New Ansonia from Mountains of Borneo (Anura, Bufonidae)
    Matsui M, Nishikawa K, Eto K, Hossman MY
    Zoolog Sci, 2020 Feb;37(1):91-101.
    PMID: 32068378 DOI: 10.2108/zs190078
    Two lineages of stream toads in the genus Ansonia from Malaysian Borneo have long been suspected to be specifically distinct on the basis of molecular data. We assessed the taxonomic status of these lineages using morphological and additional genetic data. In mtDNA phylogeny, each lineage-one from Bario, Kelabit Highlands of Sarawak, the other from Mt. Mulu of Sarawak and the Crocker Range of Sabah-is separated from other congeners by large genetic distances, comparable with those observed between heterospecific species in the genus. These lineages are also morphologically distinguishable from other species, and are considered to represent valid, independently evolving species. We therefore describe them as A. kelabitensis sp. nov. and A. kanak sp. nov.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  6. [Invasion of Drosophila albomicans into Shanghai and areas nearby and a study on its mitochondrial DNA polymorphism]
    Chen W, Zhang J, Geng Z, Zhu D
    Yi Chuan Xue Bao, 1994;21(3):179-87.
    PMID: 7917431
    We report the fact that D. albomicans invaded into Shanghai suddenly in the autumn of 1991. Using 9 restriction enzymes, we analyse the RFLPs of mitochondrial DNA of 29 isofemale lines belonging to 4 populations of Shanghai, Jiading, Qinpu and Nanhui. We find that all 29 haplotypes are different from each other. Comparing with the populations of Canton, Kunming, Sanhutan (Taiwan), Sumoto (Japan), and Kuala Lumper (Malaysia), we come to the conclusion that D. albomicans caught in Shanghai and areas nearby is from a few of places in the south of China-mainland. This conclusion agrees with the viewpoint that this species is on the speciation stage of migration towards north. We also discuss the mtDNA polymorphism within the species.
    Matched MeSH terms: DNA, Mitochondrial/genetics*
  7. Genetic variation of Haemonchus contortus (Trichostrongylidae) in sheep and goats from Malaysia and Yemen
    Gharamah AA, Azizah MN, Rahman WA
    Vet Parasitol, 2012 Sep 10;188(3-4):268-76.
    PMID: 22538095 DOI: 10.1016/j.vetpar.2012.04.003
    The large stomach worm, Haemonchus contortus, commonly known as "the barber's pole worm", is a blood-sucking nematode found in the abomasa of sheep and goats. This work is the first documentation on the ND4 sequences of H. contortus from sheep and goats in Malaysia and Yemen and the results provide a preliminary insight on the genetic differences of H. contortus found in the two countries. In general, this study showed a high degree of diversity and low population structure of this species within the same country in comparison with higher genetic structuring at a wider geographical scale. The results also showed that the majority of genetic variance was within H. contortus populations. The Malaysian sheep and goat populations investigated appeared to share the same isolate of H. contortus while different isolates may be found in Yemen which must be taken into account in the design of an effective control strategy. Analysis of the internal transcribed spacer-2 (ITS-2) confirmed that all samples investigated in this study belonged to H. contortus. However presence of other Haemonchus species parasitizing these two hosts can only be confirmed by further detailed studies.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  8. Mitochondrial disorder, diabetes mellitus, and findings in three muscles, including the heart
    Bhattacharjee M, Venugopal B, Wong KT, Goto YI, Bhattacharjee MB
    Ultrastruct Pathol, 2006 Nov-Dec;30(6):481-7.
    PMID: 17183762
    The authors describe the case of a 50-year-old man with chronic progressive external ophthalmoplegia (CPEO), diabetes mellitus (DM), and coronary artery disease. The patient had no cardiac conduction abnormalities. During coronary artery bypass surgery, his heart and two skeletal muscles were biopsied. All three muscles showed ragged red fibers. The heart muscle showed significant glycogen accumulation. Analysis of mitochondrial DNA (mtDNA) showed a 5019-base-pair deletion, with no duplications. There were morphologically abnormal mitochondria in all 3 muscles, with clinically apparent difference in preservation of function. The combination of diabetes mellitus and mtDNA deletion is fortuitous, as they can be causally linked. The cardiac pathology allows speculation about the possible adaptive processes that may occur in the heart in DM. There are few reported cases with CPEO and excess glycogen in the heart. Most show deposition of fat and poorer clinical outcomes as compared to those with glycogen deposition. This observation may lend support to the hypothesis that in the myocardium, adaptive responses are mediated via changes in glucose handling, whereas alterations in fat metabolism likely represent maladaptation.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  9. Fulltext Accumulation of Mitochondrial DNA Microsatellite Instability in Malaysian Patients with Primary Central Nervous System Tumors
    Radzak S, Khair Z, Ahmad F, Idris Z, Yusoff A
    Turk Neurosurg, 2021;31(1):99-106.
    PMID: 33491172 DOI: 10.5137/1019-5149.JTN.27893-20.4
    AIM: To determine the mitochondrial microsatellite instability (mtMSI) status in a series of Malaysian patients with brain tumors. Furthermore, we analyzed whether the mtMSI status is associated with the clinicopathological features of the patients.

    MATERIAL AND METHODS: Forty fresh frozen tumor tissues along with blood samples of brain tumor patients were analyzed for mtMSI by PCR amplification of genomic DNAs, and the amplicons were directly sequenced in both directions using Sanger sequencing.

    RESULTS: Microsatellite analysis revealed that 20% (8 out of 40) of the tumors were mtMSI positive with a total of 8 mtMSI changes. All mtMSI markers were detected in D310 and D16184 of the D-loop region. Additionally, no significant association was observed between mtMSI status and clinicopathological features.

    CONCLUSION: The variations, specifically the mtMSI, suggest that the mitochondrial DNA (mtDNA) can be targeted for genomic alteration in brain tumors. Therefore, the specific role of mtDNA alteration in brain tumor development and prognosis requires further investigation.

    Matched MeSH terms: DNA, Mitochondrial/genetics*
  10. Fulltext Molecular identification of Malaysian Chrysomya megacephala (Fabricius) and Chrysomya rufifacies (Macquart) using life stage specific mitochondrial DNA
    Kavitha R, Tan TC, Lee HL, Nazni WA, Sofian AM
    Trop Biomed, 2013 Jun;30(2):211-9.
    PMID: 23959486 MyJurnal
    DNA identification of blow fly species can be a very useful tool in forensic entomology. One of the potential benefits that mitochondrial DNA (mtDNA) has offered in the field of forensic entomology is species determination. Conventional identification methods have limitations for sibling and closely related species of blow fly and stage and quality of the specimen used. This could be overcome by DNA-based identification methods using mitochondrial DNA which does not demand intact or undamaged specimens. Mitochondrial DNA is usually isolated from whole blow fly and legs. Alternate sources for mitochondrial DNA isolation namely, egg, larva, puparium and empty puparium were explored in this study. The sequence of DNA obtained for each sample for every life cycle stage was 100% identical for a particular species, indicating that the egg, 1st instar, 2nd instar, 3rd instar, pupa, empty puparium and adult from the same species and obtained from same generation will exhibit similar DNA sequences. The present study also highlighted the usefulness of collecting all life cycle stages of blow fly during crime scene investigation with proper preservation and subsequent molecular analysis. Molecular identification provides a strong basis for species identification and will prove an invaluable contribution to forensic entomology as an investigative tool in Malaysia.
    Matched MeSH terms: DNA, Mitochondrial/genetics*
  11. Fulltext DNA typing of Calliphorids collected from human corpses in Malaysia
    Kavitha R, Tan TC, Lee HL, Nazni WA, Sofian-Azirun M
    Trop Biomed, 2013 Mar;30(1):119-24.
    PMID: 23665717 MyJurnal
    Estimation of post-mortem interval (PMI) is crucial for time of death determination. The advent of DNA-based identification techniques forensic entomology saw the beginning of a proliferation of molecular studies into forensically important Calliphoridae (Diptera). The use of DNA to characterise morphologically indistinguishable immature calliphorids was recognised as a valuable molecular tool with enormous practical utility. The local entomofauna in most cases is important for the examination of entomological evidences. The survey of the local entomofauna has become a fundamental first step in forensic entomological studies, because different geographical distributions, seasonal and environmental factors may influence the decomposition process and the occurrence of different insect species on corpses. In this study, calliphorids were collected from 13 human corpses recovered from indoors, outdoors and aquatic conditions during the post-mortem examination by pathologists from the government hospitals in Malaysia. Only two species, Chrysomya megacephala and Chrysomya rufifacies were recovered from human corpses. DNA sequencing was performed to study the mitochondrial encoded COI gene and to evaluate the suitability of the 1300 base pairs of COI fragments for identification of blow fly species collected from real crime scene. The COI gene from blow fly specimens were sequenced and deposited in GenBank to expand local databases. The sequenced COI gene was useful in identifying calliphorids retrieved from human corpses.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  12. Fulltext Simulium (Nevermannia) chomthongense, a new species of black fly (Diptera: Simuliidae) from Chiang Mai, Thailand
    Takaoka H, Srisuka W, Saeung A, Otsuka Y, Choochote W
    Trop Biomed, 2012 Sep;29(3):381-90.
    PMID: 23018501
    Simulium (Nevermannia) chomthongense sp. nov. is described from female, male, pupal and larval specimens collected from Doi Inthanon National Park and Doi Phahompok National Park, Chiang Mai, Thailand. This new species, first reported as S. (Eusimulium) sp. A, and later regarded as S. (N.) caudisclerum Takaoka & Davies, described from peninsular Malaysia, is distinguished from S. (N.) caudisclerum in the male by the number of enlarged upper-eye facets and the relative size of the hind basitarsus against the hind tibia and femur, and in the pupa by the relative length of the stalks of paired filaments against the common basal stalk and the color of the dorsal surface of abdominal segments 1- 3 (or 4). Taxonomic and molecular notes are provided to separate this new species from four other known species of the vernum species-group, which share an accessory sclerite on the larval abdomen, a rare characteristic in this species-group.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  13. Fulltext Sequence variation in the cytochrome oxidase subunit I and II genes of two commonly found blow fly species, Chrysomya megacephala (Fabricius) and Chrysomya rufifacies (Macquart) (Diptera: Calliphoridae) in Malaysia
    Tan SH, Aris EM, Surin J, Omar B, Kurahashi H, Mohamed Z
    Trop Biomed, 2009 Aug;26(2):173-81.
    PMID: 19901904
    The mitochondiral DNA region encompassing the cytochrome oxidase subunit I (COI) and cytochrome oxidase subunit II (COII) genes of two Malaysian blow fly species, Chrysomya megacephala (Fabricius) and Chrysomya rufifacies (Macquart) were studied. This region, which spans 2303bp and includes the COI, tRNA leucine and partial COII was sequenced from adult fly and larval specimens, and compared. Intraspecific variations were observed at 0.26% for Ch. megacephala and 0.17% for Ch. rufifacies, while sequence divergence between the two species was recorded at a minimum of 141 out of 2303 sites (6.12%). Results obtained in this study are comparable to published data, and thus support the use of DNA sequence to facilitate and complement morphology-based species identification.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  14. Global genetic diversity of Spirometra tapeworms
    Hong X, Liu SN, Xu FF, Han LL, Jiang P, Wang ZQ, et al.
    Trop Biomed, 2020 Mar 01;37(1):237-250.
    PMID: 33612735
    Spirometra larvae are etiological agents of human sparganosis. However, the systematics of spirometrid cestodes has long been controversial. In order to determine the current knowledge on the evolution and genetic structure of Spirometra, an exhaustive population diversity analysis of spirometrid cestodes using the mitochondrial gene: cytochrome c oxidase subunit 1 (cox1) was performed. All publicly available cox1 sequences available in the GenBank and 127 new sequencing genes from China were used as the dataset. The haplotype identify, network, genetic differentiation and phylogenetic analysis were conducted successively. A total of 488 sequences from 20 host species, representing four spirometrid tapeworms (S. decipiens, S. ranarum, S. erinaceieuropaei and Sparganum proliferum) and several unclassified American and African isolates from 113 geographical locations in 17 countries, identified 45 haplotypes. The genetic analysis revealed that there are four clades of spirometrid cestodes: Clade 1 (Brazil + USA) and Clade 2 (Argentina + Venezuela) included isolates from America, Clade 3 contained African isolates and one Korean sample, and the remainders from Asia and Australia belonged to Clade 4; unclassified Spirometra from America and Africa should be considered the separate species within the genus; and the taxonomy of two Korea isolates (S. erinaceieuropaei KJ599680 and S. decipiens KJ599679) was still ambiguous and needs to be further identified. In addition, the demographical analyses supported population expansion for the total spirometrid population. In summary, four lineages were found in the spirometrid tapeworm, and further investigation with deeper sampling is needed to elucidate the population structure.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  15. Genetic variation of NADH dehydrogenase subunit 1 (nad1) mitochondrial gene sequence in adult Necator americanus hookworms recovered from a female patient in Thailand
    Eamsobhana P, Yong HS, Roongruangchai K, Tungtrongchitr A, Wanachiwanawin D
    Trop Biomed, 2020 Jun 01;37(2):536-541.
    PMID: 33612820
    Two female and one male adult hookworms were recovered from a female patient in Thailand. Based on gross and microscopic morphology, the three hookworms are members of Necator americanus. Phylogenetic reconstruction based on partial NADH dehydrogenase subunit 1 (nad1) mitochondrial gene sequences shows that these hookworms belong to the same genetic lineage as N. americanus adult worm from Zhejiang, China. The male and female hookworms were genetically distinct, belonging to two different nad1-haplotypes. This is the first report targeting the nad1 gene on the identification and genetic characterization of the human hookworms originated from infected patient. The nad1 gene marker is useful for species and higher taxa differentiation of hookworms.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  16. Fulltext Mitochondrial hepatopathies: advances in genetics, therapeutic approaches, and outcomes
    Lee WS, Sokol RJ
    J Pediatr, 2013 Oct;163(4):942-8.
    PMID: 23810725 DOI: 10.1016/j.jpeds.2013.05.036
    Matched MeSH terms: DNA, Mitochondrial/genetics
  17. Fulltext Genetic diversity and distinctiveness of the proboscis monkeys (Nasalis larvatus) of the Klias Peninsula, Sabah, Malaysia
    Munshi-South J, Bernard H
    J Hered, 2011 May-Jun;102(3):342-6.
    PMID: 21414965 DOI: 10.1093/jhered/esr013
    In this study, we sequenced a partial segment of the mitochondrial control region from 21 proboscis monkeys of the Klias peninsula, the last large population remaining on the west coast of Sabah, Malaysia. Our results showed that this population retains substantial genetic variation, and subpopulations from different river systems in the central and southern portions of the Klias share multiple haplotypes. We also compared our data with previously generated sequences from 2 eastern populations of proboscis monkeys in Sabah and found little evidence of regional genetic structure. Based on these results, we argue that conservation efforts should focus on restoring connectivity between central and southern Klias peninsula proboscis monkeys and discuss future analyses needed to better understand the mitochondrial structure of proboscis monkeys in Sabah.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  18. Possible conservation units of the sun bear (Helarctos malayanus) in Sarawak based on variation of mtDNA control region
    Onuma M, Suzuki M, Ohtaishi N
    Jpn. J. Vet. Res., 2006 Nov;54(2-3):135-9.
    PMID: 17201199
    The mitochondrial DNA control region of the sun bear (Helarctos malayanus) was sequenced using 21 DNA samples collected from confiscated sun bears to identify conservation units, such as evolutionarily significant units and management units, in Sarawak, Borneo Island. A total of 10 haplotypes were observed, indicating the presence of at least two lineages in the sun bear population in Sarawak. Presumably, these two lineages could represent evolutionarily significant units. However, the geographical distributions of the two lineages remained unknown due to the lack of information regarding the exact capture locations of the confiscated sun bears. It is essential to elucidate the geographical distributions of these lineages in order to create a proper conservation plan for the sun bears in Sarawak. Therefore, further studies examining the haplotype distributions using DNA samples from known localities are essential.
    Matched MeSH terms: DNA, Mitochondrial/genetics*
  19. Fulltext The genetic legacy of continental scale admixture in Indian Austroasiatic speakers
    Tätte K, Pagani L, Pathak AK, Kõks S, Ho Duy B, Ho XD, et al.
    Sci Rep, 2019 03 07;9(1):3818.
    PMID: 30846778 DOI: 10.1038/s41598-019-40399-8
    Surrounded by speakers of Indo-European, Dravidian and Tibeto-Burman languages, around 11 million Munda (a branch of Austroasiatic language family) speakers live in the densely populated and genetically diverse South Asia. Their genetic makeup holds components characteristic of South Asians as well as Southeast Asians. The admixture time between these components has been previously estimated on the basis of archaeology, linguistics and uniparental markers. Using genome-wide genotype data of 102 Munda speakers and contextual data from South and Southeast Asia, we retrieved admixture dates between 2000-3800 years ago for different populations of Munda. The best modern proxies for the source populations for the admixture with proportions 0.29/0.71 are Lao people from Laos and Dravidian speakers from Kerala in India. The South Asian population(s), with whom the incoming Southeast Asians intermixed, had a smaller proportion of West Eurasian genetic component than contemporary proxies. Somewhat surprisingly Malaysian Peninsular tribes rather than the geographically closer Austroasiatic languages speakers like Vietnamese and Cambodians show highest sharing of IBD segments with the Munda. In addition, we affirmed that the grouping of the Munda speakers into North and South Munda based on linguistics is in concordance with genome-wide data.
    Matched MeSH terms: DNA, Mitochondrial/genetics
  20. Fulltext Brown banded bamboo shark (Chiloscyllium punctatum) shows high genetic diversity and differentiation in Malaysian waters
    Lim KC, Then AY, Wee AKS, Sade A, Rumpet R, Loh KH
    Sci Rep, 2021 Jul 21;11(1):14874.
    PMID: 34290296 DOI: 10.1038/s41598-021-94257-7
    The demersal brown banded bamboo shark Chiloscyllium punctatum is a major component of sharks landed in Malaysia. However, little is known about their population structure and the effect of high fishing pressure on these weak swimming sharks. Both mitochondrial DNA control region (1072 bp) and NADH dehydrogenase subunit 2 (1044 bp) were used to elucidate the genetic structure and connectivity of C. punctatum among five major areas within the Sundaland region. Our findings revealed (i) strong genetic structure with little present day mixing between the major areas, (ii) high intra-population genetic diversity with unique haplotypes, (iii) significant correlation between genetic differentiation and geographical distance coupled with detectable presence of fine scale geographical barriers (i.e. the South China Sea), (iv) historical directional gene flow from the east coast of Peninsular Malaysia towards the west coast and Borneo, and (v) no detectable genetic differentiation along the coastline of east Peninsular Malaysia. Genetic patterns inferred from the mitochondrial DNA loci were consistent with the strong coastal shelf association in this species, the presence of contemporary barriers shaped by benthic features, and limited current-driven egg dispersal. Fine scale population structure of C. punctatum highlights the need to improve genetic understanding for fishery management and conservation of other small-sized sharks.
    Matched MeSH terms: DNA, Mitochondrial/genetics
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