Brown banded bamboo shark (Chiloscyllium punctatum) shows high genetic diversity and differentiation in Malaysian waters
Autor: | Alison K.S. Wee, Kar-Hoe Loh, Richard Rumpet, Amy Yee-Hui Then, Kean Chong Lim, Ahemad Sade |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Gene Flow
0106 biological sciences China Conservation of Natural Resources Population genetics Genetic Structures Chiloscyllium punctatum Science Fishing DNA Mitochondrial 010603 evolutionary biology 01 natural sciences Article Demersal zone Gene flow Borneo Animals Seawater Ecosystem Genetic diversity Multidisciplinary Geography biology Ecology 010604 marine biology & hydrobiology Malaysia Genetic Variation NADH Dehydrogenase biology.organism_classification Genetics Population Haplotypes Genetic structure Sharks Biological dispersal Medicine human activities |
Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-15 (2021) Scientific Reports |
ISSN: | 2045-2322 |
Popis: | 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. |
Databáze: | OpenAIRE |
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