Yanmah Brook - Manjimup Brook 3

Basin : Donnelly River

Catchment : Donnelly River

The Manjimup Brook 3 site (site code: DR199MANJ3/6081031), was assessed on several occasions:

  • 9-10 June 2021
  • 10-11 June 2021
  • 24-25 Aug 2021
  • 25 -26 Aug 2021
  • 10-11 Nov 2021
  • 11-12 Nov 2021
  • 13 -14 June 2022
  • 14-15 June 2022
  • 5 -6 Dec 2022
  • 12-13 June 2023
  • 13 -14 June 2023
  • 17 -18 July 2024
  • 18-19 July 2024

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

Condition summary

Please contact the River Science team for site information.

Fish and crayfish

Eight fish and three crayfish species were found during the assessments:

  • Bostockia porosa (Nightfish)
  • Galaxiella munda (Western mud minnow)
  • Galaxias occidentalis (Western minnow)
  • Nannatherina balstoni (Balston’s pygmy perch)
  • Nannoperca vittata (Western pygmy perch)
  • Pseudogobius olorum (Swan River goby)
  • Gambusia holbrooki (Eastern gambusia)
  • Perca fluviatilis (Redfin perch)
  • Cherax sp. nov. 3
  • Cherax cainii (Smooth marron)
  • Cherax preissii (Koonac)

Cherax sp. nov. 3 is a potential new species yet to be described, morphologically similar to Cherax preissii.

The presence of the western mud minnow is of ecological significance and a conservation priority.

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)
  • Hydromys chrysogaster (Rakali), native, semi-aquatic mammal

 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