Mitchell River - Mitchell River Bridge

Basin : Denmark Coast

Catchment : Hay - Denmark rivers

The condition of the Mitchell River - Mitchell River Bridge (site code: HD151MITC1, site reference: 6031580), in the middle catchment of the Mitchell River, was assessed between 5 and 6 November 2009, over a 100-m length of stream. The site was also assessed (for fish and crayfish only) on 18 and 19 March 2020.

The assessment was conducted using standard methods from the South West Index of River Condition (SWIRC). Measures chosen for this assessment included fish and crayfish, macroinvertebrates, aquatic habitat, water quality (dissolved oxygen and temperature logged over 24 hours, electrical conductivity, pH, colour, alkalinity, turbidity and nutrients), fringing vegetation, channel morphology, erosion, connectivity, local land use and flow.

The site was previously sampled under code: MITC-01/6121267.

Condition summary

The site was assessed as part of a national assessment of river condition – view report here.

An online condition summary for this site has not been prepared. Please contact the departments River Science team for site information, and see below for links to information on some of the species found at the site, and some images taken in November 2009.

Fish and crayfish

Three native fish and three native crayfish species were found at this site, combination of November 2009 and March 2020 data. Notably no non-native species were found.

Bostockia porosa (Nightfish)
Galaxias occidentalis (Western minnow)
Nannoperca vittata (Western pygmy perch)
Cherax crassimanus (Restricted Gilgie)
Cherax preissii (Koonac)
Cherax sp. nov1. (undescribed crayfish species)

Click on the images to learn more about each species.

Note: only fish and crayfish are targeted by sampling methods, however where other species were caught and/or observed they are included below.

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.