dc.contributor.author |
Mirimin, L.
|
|
dc.contributor.author |
Kerwath, S.E.
|
|
dc.contributor.author |
Macey, B.
|
|
dc.contributor.author |
Bester-Van der Merwe, A.
|
|
dc.contributor.author |
Lamberth, S.J.
|
|
dc.contributor.author |
Bloomer, Paulette
|
|
dc.contributor.author |
Roodt-Wilding, R.
|
|
dc.date.accessioned |
2014-05-22T08:28:52Z |
|
dc.date.available |
2014-05-22T08:28:52Z |
|
dc.date.issued |
2014-07 |
|
dc.description.abstract |
Hybridization between fish species can play a significant role in evolutionary processes and
can influence management and conservation planning, however, this phenomenon has
been widely understudied, especially in marine organisms. The distribution limits of two
sciaenid species (silver kob, Argyrosomus inodorus, and dusky kob, A. japonicus) partly
overlap along the South African coast, where both species have undergone severe depletion
due to overfishing. Following the identification of a number of possible cases of species
misidentification or hybridization (21 out of 422 individuals), nuclear and mitochondrial DNA
data (12 microsatellite loci and 562 bp of the COI gene) were analysed to investigate the
genetic composition of these individuals. Results indicated a field-based species
misidentification rate of approximately 2.8% and a rate of natural hybridization of 0.7%.
Interestingly, all hybrid fish resulted from first-generation (F1) hybridization events, which
occurred exclusively between silver kob females and dusky kob males. Whether
hybridization is the result of natural events (such as secondary contact following a shift in
distribution range), or anthropogenic activities (size-selective pressure due to overfishing),
these findings have important implications for critical recovery and future management of
these species in the wild. |
en_US |
dc.description.librarian |
hb2014 |
en_US |
dc.description.sponsorship |
DAFF (South Africa) |
en_US |
dc.description.uri |
http://www.elsevier.com/locate/ympev |
en_US |
dc.identifier.citation |
Mirimin, L, Kerwath, SE, Macey, BM, Bester-van der Merwe, A, Lamberth, SJ, Bloomer, P & Roodt-Wilding, R 2014, 'Identification of naturally occurring hybrids between two overexploited sciaenid species along the South African coast', Molecular Phylogenetics and Evolution, vol. 76, pp. 30-33. |
en_US |
dc.identifier.issn |
1055-7903 (print) |
|
dc.identifier.issn |
1095-9513 (online) |
|
dc.identifier.other |
10.1016/j.ympev.2014.02.010 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/39846 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.rights |
© 2014 Elsevier Inc. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Molecular Phylogenetics and Evolution. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Molecular Phylogenetics and Evolution, vol. 76, pp. 30-33, 2014. |
en_US |
dc.subject |
Hybridization |
en_US |
dc.subject |
Microsatellites |
en_US |
dc.subject |
Overfishing |
en_US |
dc.subject |
Argyrosomus |
en_US |
dc.subject |
Mitochondrial DNA (mtDNA) |
en_US |
dc.subject |
COI gene |
en_US |
dc.title |
Identification of naturally occurring hybrids between two overexploited sciaenid species along the South African coast |
en_US |
dc.type |
Postprint Article |
en_US |