Some impacts of low and medium head weirs on downstream fish movement in the Murray-Darling Basin in southeastern Australia

Some impacts of low and medium head weirs on downstream fish movement in the Murray-Darling Basin in southeastern Australia

–  This article reports on the findings of a study undertaken within the Murray‐Darling River Basin in southeastern Australia, which investigated the impact of weirs on downstream fish movement. Downstream fish movement was monitored at Kennedy's Weir (an overshot, 2 m high weir) on the Broken...

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Bibliographic Details
Published in:Ecology of freshwater fish Vol. 15; no. 4; pp. 419 - 427
Main Authors: O'Connor, J. P., O'Mahony, D. J., O'Mahony, J. M., Glenane, T. J.
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01-12-2006
Subjects:
barrier
downstream movement
Freshwater
golden perch
Murray cod
weirs
Australia, Murray R
Australia, Murray-Darling Basin
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Summary:–  This article reports on the findings of a study undertaken within the Murray‐Darling River Basin in southeastern Australia, which investigated the impact of weirs on downstream fish movement. Downstream fish movement was monitored at Kennedy's Weir (an overshot, 2 m high weir) on the Broken Creek and Torrumbarry Weir (an undershot, 6.5 m high weir) on the Murray River. A trap used to sample Kennedy's Weir indicated that fish travelled downstream over this weir without sustaining injury or death. A follow‐up study, whereby fish were captured below the two respective weirs and translocated upstream where they were radio tagged and released, indicated that while a few fish travelled downstream past the weirs on their return movements back to their home range areas, most were reluctant to do so. This study demonstrates that low‐level weirs may inhibit downstream fish movement, and enhancement of downstream fish passage for potamodromous fish species warrants further investigation.
Bibliography:istex:3F9FBF82934E396562585FE87849D0EEBA129FCC
ark:/67375/WNG-F677N16X-V
ArticleID:EFF162
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0906-6691
1600-0633
DOI:10.1111/j.1600-0633.2006.00162.x