n African Zoology - Genetic variation in the mud crab (Forskål, 1775) (Crustacea : Portunidae) in South African estuaries

Volume 38, Issue 2
  • ISSN : 1562-7020
  • E-ISSN: 2224-073X
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Populations of <I>Scylla serrata&lt;/I&gt; (Forskål) were sampled in six South African estuaries and one Madagascan estuary. Randomly amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) was used to assess the genetic variation in populations found in these estuaries. A high level of variation with a low geographic bias suggested that the South African population should be considered a single entity. The Madagascan population grouped together as a separate clade from the South African estuarine populations and was therefore probably distinct. The Madagascan population also had a lower level of genetic variation than that found among the populations within South African estuaries. While restocking estuaries by releasing newlyhatched larvae would probably not be possible, restocking of estuaries by translocation of cultured juveniles (when hatchery technology becomes available) between South African estuaries may be done with minimal risk of affecting the genetic integrity of the indigenous population of <I>S. serrata</I>.

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