Genetic diversity of the giant tiger prawn Penaeus monodon in relation to trace metal pollution at the Tanzanian coast
| Autor: | Marc Kochzius, Marc Elskens, Paul Gwakisa, Martine Leermakers, C. Rumisha, Robinson H. Mdegela |
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| Přispěvatelé: | Faculty of Sciences and Bioengineering Sciences, Earth System Sciences, Analytical, Environmental & Geo-Chemistry, Chemistry, Biology, Ecology and Systematics |
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Pollution Gene Flow media_common.quotation_subject 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Tanzania Giant tiger shrimp Penaeus monodon Gene flow 03 medical and health sciences Penaeidae Metals Heavy parasitic diseases Animals Genetic erosion Indian Ocean 0105 earth and related environmental sciences media_common Genetic diversity biology Simple sequence repeats (SSR) Tiger Ecology Genetic Variation Genetic population structure DNA biology.organism_classification East Africa Heavy metal pollution Trace Elements 030104 developmental biology Mantel test Microsatellite human activities Water Pollutants Chemical Microsatellite Repeats |
| Zdroj: | Marine pollution bulletin. 114(2) |
| ISSN: | 1879-3363 |
| Popis: | The genetic diversity of giant tiger prawns in relation to trace metals (TMs) pollution was analysed using 159 individuals from eight sites at the Tanzanian coast. The seven microsatellites analysed showed high degree of polymorphism (4–44 alleles). The measured genetic diversity (Ho = 0.592 ± 0.047) was comparable to that of populations in the Western Indian Ocean. Apart from that, correlation analysis revealed significant negative associations between genetic diversity and TMs pollution (p < 0.05), supporting the genetic erosion hypothesis. Limited gene flow was indicated by a significant genetic differentiation (FST = 0.059, p < 0.05). The Mantel test rejected the isolation-by-distance hypothesis, but revealed that gene flow along the Tanzanian coast is limited by TMs pollution. This suggests that TMs affect larvae settlement and it may account for the measured deficiency of heterozygosity. This calls for strengthened pollution control measures in order to conserve this commercially important species. |
| Databáze: | OpenAIRE |
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