Collie River South Branch - McAlinden Road upstream

Basin : Collie River

Catchment : Collie River

The McAlinden Road upstream site (site code: CR204COLL1/6120106), was assessed on 11-12 March 2026. Additionally, water quality loggers were deployed 25 March 2026 to 4 May 2026 (measuring dissolved oxygen, temperature, electrical conductivity, and pH every 30 minutes)

Only aquatic biota and water quality was assessed, using the standard methods from the South West Index of River Condition.

Condition summary

Please contact the River Science Branch for site information.

Fish and crayfish

Four fish and one crayfish species were found at this site in 2015 (combination of all four sampling events):

  • Bostockia porosa (Nightfish)
  • Nannoperca vittata (Western pygmy perch)
  • Gambusia holbrooki (Eastern gambusia) – non-native
  • Perca fluviatilis (Redfin perch) – non-native
  • Cherax quinquecarinatus (Gilgie)

Only fish and crayfish are targeted by sampling methods. Other species that were caught and/or observed are listed below:

  • Palaemon australis (South-west glass shrimp)

Click on the images below to learn more.

Species found in subcatchment

This includes all species found within the subcatchment of the assessment site, from this and previous studies in the area. The photos are linked to more information about each species, including maps of where they are expected across the south-west.

Explore other sites in the catchment