Due to routine maintenance, access to the Library Open Repository will be interrupted on the morning of Friday 12th February.
We apologise for any inconvenience.

Library Open Repository

Cytotaxonomy of seven species of Galaxias (Pisces: Galaxiidae) in Tasmania

Downloads

Downloads per month over past year

Johnson, CR and White, RWG and Bick, YAE (1981) Cytotaxonomy of seven species of Galaxias (Pisces: Galaxiidae) in Tasmania. Genetica, 56. pp. 17-21. ISSN 0016-6707

[img] PDF
Johnson_et_al_1...pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

Karyotypes of 7 species of the genus Galaxias in Tasmania are compared and a phylogenetic interpretation of these data offered. Species fall into 3 distinct groups, viz. those with 2n=44 (G. brevipinnis, G. johnstoni and G. fontanus), those with 2n=32 (G. truttaceus, G. tanycephalus and G. auratus), and G. maculatus with 2n=22. Land-locking appears to have been a major evolutionary force. G. johnstoni and G. fontanus are most likely land-locked derivatives of the ancestral G. brevipinnis. G. tanycephalus and G. auratus are almost certainly land-locked derivatives of the ancestral G. truttaceus. G. maculatus has a specialized karyotype which may have been derived from a G. truttaceus-like complement by 5 Robertsonian centric fusions. It is postulated that the original stock ancestral to the 7 species examined was G. brevipinnis-like. Species relationships suggested from previous classical morphological investigations are supported by the present study.

Item Type: Article
Journal or Publication Title: Genetica
Page Range: pp. 17-21
ISSN: 0016-6707
Date Deposited: 25 Jun 2007
Last Modified: 18 Nov 2014 03:18
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page