Samson Brook - Downstream Samson Brook Dam 2

The condition of the Samson Brook - Downstream Samson Brook Dam 2 site (site code: SAM-02/6131314), in the upper catchment of the Samson Brook, was assessed between 8 and 9 October 2009, over a 100-m length of stream. At this time no previous assessments of river ecology had been reported.

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

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. For other site data please contact the department’s River Science team (provide the site code and sampling dates). See below for links to information on species found at the site, and images taken in October 2009.

Fish and crayfish

One fish and two crayfish species were found at this site in October 2009.

Native species found:
Cherax cainii (smooth marron)
Cherax quinquecarinatus (gilgie)

Non-native species found:
Oncorhynchus mykiss (rainbow trout)

Only fish and crayfish are targeted by sampling methods, other species found include: Palaemon australis (south-west glass shrimp).

Note: collection of fauna from inland aquatic ecosystems across Western Australia requires a license from the Department of Primary Industries and Regional Development (DPIRD) and the Department of Biodiversity, Conservation and Attractions (DBCA). All species collected must be reported to these agencies as part of license conditions.

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.