Allozyme variation and taxonomy of the river blackfish, Gadopsis marmoratus Richardson, in western Victoria

Ryan, S.G., Miller, A.D. and Austin, C.M. 2004, Allozyme variation and taxonomy of the river blackfish, Gadopsis marmoratus Richardson, in western Victoria, Proceedings of the Royal Society of Victoria, vol. 116, no. 2, pp. 191-199.

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Title Allozyme variation and taxonomy of the river blackfish, Gadopsis marmoratus Richardson, in western Victoria
Formatted title Allozyme variation and taxonomy of the river blackfish, Gadopsis marmoratus Richardson, in western Victoria
Author(s) Ryan, S.G.
Miller, A.D.ORCID iD for Miller, A.D. orcid.org/0000-0002-1632-7206
Austin, C.M.ORCID iD for Austin, C.M. orcid.org/0000-0003-1848-6267
Journal name Proceedings of the Royal Society of Victoria
Volume number 116
Issue number 2
Start page 191
End page 199
Total pages 9
Publisher Royal Society of Victoria
Place of publication Melbourne, Vic.
Publication date 2004
ISSN 0035-9211
2204-1362
Keyword(s) blackfish
Gadopsis marmoratus
allozyme electrophoresis
morphology
taxonomy
Australia
Summary A taxonomic study of the river blackfish, Gadopsis marmoratus was conducted using allozyme and morphological data. Focussing upon populations from western Victoria and south-eastern South Australia, a total of 147 blackfish from 14 locations were scored for variation at 28 allozyme loci. The occurrence of fixed allelic differences between samples less than 50 kilometres apart suggests that G. marmoratus comprises distinct northern and southern forms, consistent with previous allozyme studies. While the degree of allozyme differentiation between the northern and southern forms is small for freshwater fish species, their recognition as distinct species is justified on the basis of the limited geographic allozyme variation within each form and the finding of a geographically abrupt genetic discontinuity in western Victoria. An examination of dorsal fin spine counts also indicated differences between northern and southern forms. However, a high degree of variation within the northern form of G. marmoratus reduces the value of this trait for diagnostic purposes, not only for distinguishing between the two genetic forms of G. marmoratus, but also between G. marmoratus and G. bispinosus.
Language eng
Field of Research 060411 Population, Ecological and Evolutionary Genetics
050202 Conservation and Biodiversity
060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©[2004, Royal Society of Victoria]
Persistent URL http://hdl.handle.net/10536/DRO/DU:30088750

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