Please Note:

The Open Access Repository has moved to a new authentication system as of the 1st of November.

Account holders will now be able to login using their University of Tasmania credentials.
If you have trouble logging in please email us on E.Prints@utas.edu.au so we can assist you.

Public users can still access the records in this repository as normal

Open Access Repository

Improving the upstream passage of two galaxiid fish species through a pipe culvert

Downloads

Downloads per month over past year

Macdonald, J and Davies, PE (2007) Improving the upstream passage of two galaxiid fish species through a pipe culvert. Fisheries Management and Ecology, 14. pp. 221-230.

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

Abstract

Movement between habitats in river fish assemblages is often restricted by instream structures such as culverts. The ability of diadromous common jollytail, Galaxias maculatus (Jenyns), and spotted galaxias, Galaxias truttaceus (Val.), to pass upstream through an in situ pipe culvert modified through the installation of baffles was assessed. Spoiler baffles (100 x 70 x 28 or 56 mm) were installed in three spatial arrangements along a 5.5-m section of the pipe, and individual fish passage assessed at three flow velocities (0.35, 0.70 and 1.0 m s1). Common jollytails (43 - 169 mm fork length, FL) were 10 times more successful in passing when baffles were present than under control conditions (baffles absent). Baffle size did not influence success, which increased with the spatial complexity of the baffle arrangement. Across all velocities, common jollytails (46 - 132 mm FL) and spotted galaxias (55 - 190 mm FL) were, respectively, 86 and 73 times more successful with the most complex baffle arrangement (overall 80% success) compared with control conditions (overall 13.5% success). Success for both species decreased at higher velocities under control conditions; however, when baffles were present, this trend persisted only for common jollytails. Installing small spoiler baffles may provide a simple, cost-effective solution to passage problems at culverts.

Item Type: Article
Keywords: baffle, biobaffle, Australia, fish passage, barrier, culvert, diadromous, fish passage, Galaxias, restoration, Tasmania, aquatic, freshwater, Jed Macdonald, Peter Davies
Journal or Publication Title: Fisheries Management and Ecology
Page Range: pp. 221-230
Identification Number - DOI: 10.1111/j.1365-2400.2007.00546.x
Additional Information:

The definitive version is available at www.blackwell-synergy.com

Date Deposited: 14 May 2007
Last Modified: 18 Nov 2014 03:15
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP