Panmixia in Pocillopora verrucosa from South Africa

Ridgway, T., Hoegh-Guldberg, O. and Ayre, D. J. (2001) Panmixia in Pocillopora verrucosa from South Africa. Marine Biology, 139 1: 175-181.

Author Ridgway, T.
Hoegh-Guldberg, O.
Ayre, D. J.
Title Panmixia in Pocillopora verrucosa from South Africa
Journal name Marine Biology   Check publisher's open access policy
ISSN 0025-3162
Publication date 2001
Sub-type Article (original research)
Volume 139
Issue 1
Start page 175
End page 181
Total pages 7
Editor O. Kinne
Place of publication Berlin, Germany
Publisher Springer-Verlag
Collection year 2001
Language eng
Subject C1
270203 Population and Ecological Genetics
780105 Biological sciences
770307 Marine protected areas
Abstract The genetic structure of six local collections of Pocillopora verrrucosa from six coral reefs in KwaZulu-Natal, South Africa, was examined using allozyme electrophoresis. The six separate reefs lie within two different reef complexes. Twenty-two enzymes were screened on five buffer systems, but only five polymorphic loci (Gpi-1, Gdh-1, Lgg-2, Lpp-1, Est-1) could be consistently resolved. No significant differences in allelic frequencies were detected among the six sites. All local collections were genotypically diverse, with evidence of only very limited clonal replication at each site. Indeed, the ratio of observed to expected genotypic diversity (mean Go:Ge=0.64 +/-0.05 SD), the ratio of observed number of genotypes to the number of individuals (mean Ng:N = 0.65 +/-0.04 SE), and deviations from the Hardy-Weinberg equilibrium indicate that sexual reproduction plays a major role in the maintenance of the populations. No genetic differentiation was found either within (FSR = 0.026 +/-0.003 SE) or between (FRT = 0.000 +/-0.001 SE) reef complexes. The homogeneity of the gene frequencies across the six reefs strongly supports the assumption that the KwaZulu-Natal reef complexes are highly connected by gene flow (Nem=44). The reefs in the southern and central reef complexes along the northern Maputaland coastline can therefore be considered part of a single population.
Keyword Marine & Freshwater Biology
Gene Flow
Asexual Production
Sodwana Bay
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Marine Studies Publications
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Citation counts: TR Web of Science Citation Count  Cited 52 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 14 Aug 2007, 16:26:01 EST