Figure 1.
Map showing location of the study site.
White triangles represent the locations of each of the listening stations in the Murray and Goulburn rivers. Black circles represent the locations of each of the drift sampling sites.
Table 1.
Details of the tagged golden perch during the study.
Figure 2.
Times during which tagged fish were detected in mainstem, tributary and junction locations.
Times (filled bars) during which fish tagged in the Murray River were detected in the Murray River >2 km from junction (dark grey bar), Murray River within 2 km of junction (black bar), and Goulburn River (light grey bar) (A), and times during which fish tagged in the Goulburn River were detected in the Goulburn River (light grey bar), Murray River within 2 km of junction (black bar) and Murray River >2 km from junction (dark grey bar) (B). Red ‘X’ indicates fish reported as caught and kept by angler. Numbers refer to individual tagged fish. Fish were tagged on three separate occasions (April 2007, April 2008, April 2009). Aqua vertical bar represents spawning season.
Figure 3.
Percentage of mainstem fish detected in tributary and percentage of tributary fish detected in mainstem.
Percentage of Murray River fish (grey line) detected in the Goulburn River (A) and percentage of Goulburn River fish (grey line) detected in the Murray River (B). Blue line represents daily mean discharge in the Murray River at Yarrawonga (A) and Goulburn River at McCoys Bridge (B). Adjusted total density of golden perch eggs/larvae (black bar) per 1000 m3 collected in drift nets in Goulburn River (A) and Murray River (B).
Figure 4.
Predicted probability of fish remaining in the Murray River versus mean weekly temperature.
Black line represents fish tagged in the Murray River and grey line represents fish tagged in the Goulburn River. Solid line represents spawning season (September–February) and broken line non-spawning season.
Table 2.
Relative importance of predictor variables and parameter estimates for the model averages (models with ΔAICc <4) for the transition models for movement between the Murray and the Goulburn Rivers.
Figure 5.
Predicted probability of fish remaining in the Goulburn River versus percentage change in flow.
Black line represents fish tagged in the Murray River and grey line represents fish tagged in the Goulburn River. Solid line represents spawning season (September–February) and broken line non-spawning season.