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Historic divergence with contemporary connectivity in a catadromous fish, the estuary perch (Macquaria colonorum)
Citation
Shaddick, K and Gilligan, DM and Burridge, CP and Jerry, DR and Truong, K and Beheregaray, LB, Historic divergence with contemporary connectivity in a catadromous fish, the estuary perch (Macquaria colonorum) , Canadian Journal of Fisheries and Aquatic Sciences, 68, (2) pp. 304-318. ISSN 0706-652X (2011) [Refereed Article]
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Copyright Statement
© Copyright 2011 – Canadian Science Publishing
DOI: doi:10.1139/F10-139
Abstract
The estuary perch (Macquaria colonorum) represents an important model for assessing how historical changes
in coastal geomorphology and current oceanographic and estuarine conditions may have impacted connectivity in a cata-
dromous fish. A fragment of the mitochondrial control region and six microsatellite DNA markers were used to clarify
connectivity in 17 populations (n = 354) of estuary perch from the southeast and southern coasts of Australia. The mtDNA
data showed a latitudinal disjunction in haplotype frequencies that divided populations into two groups (FST = 0.419), in a
pattern suggestive of isolation by geographic distance. However, no marked structure or correlation with distance was ap-
parent within each group, a result consistent with microsatellite data that showed high contemporary population connectiv-
ity across large distances. This was contrary to expectations that the species would exhibit moderate to strong genetic
structure consistent with a one-dimensional stepping stone pattern. Coalescent phylogeographic and population genetic
analyses provided support for a historical divergence probably due to the emergence of the Bassian Isthmus in southern
Australia. Current connectivity appears to be maintained by both large- and fine-scale oceanographic currents and proc-
esses, highlighting the important role of the marine environment for an estuarine resident species.
Item Details
Item Type: | Refereed Article |
---|---|
Research Division: | Biological Sciences |
Research Group: | Genetics |
Research Field: | Genetics not elsewhere classified |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the biological sciences |
UTAS Author: | Burridge, CP (Associate Professor Christopher Burridge) |
ID Code: | 67458 |
Year Published: | 2011 |
Web of Science® Times Cited: | 22 |
Deposited By: | Zoology |
Deposited On: | 2011-03-03 |
Last Modified: | 2017-10-31 |
Downloads: | 2 View Download Statistics |
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