Biodiversity Of Our Stream
Stream Analysis
  • Home Page
  • Biological test
    • What Are Macro-invertebrates?
    • Technique of catching
    • Stream Pollution
    • Insects in Stream
    • Data Analysis Of Insects
  • Chemical test
    • Water Assesment
    • Turbidity
    • Temperature>
      • Disolved oxygen (DO)
      • Acidity (pH)
      • Data Analysis
  • Evidence of human impact

Technique of catching

Materials:   
  • waste bucket
  • sample bucket
  • one 500 micron sieve
  • squirt bottles


Setting up site

Identify the riffles and pools in the site (Pools are seen in a winding stream where the outer edge of each loop is deep and uppercut; riffles form in the shallow water of the short, straight, wide reaches between adjacent loops)

measure 40m upstream from a downstream crossover make sure there is a point in the stream where the current travels parallel with the banks

Mark the transects
Picture
transcets are lines which cute across the stream perpendicular to the bank; number transects depends on width of stream
Collecting your sample

Collect sample from all transects, use the Traveling Kick Method to collect samples
  •  hold d- net facing upstream so stream flows into net
  •  with d net on stream other person will "kick and dance" in front of net
  •   work your way across the transect
  •   Pick-up rocks sub their surface to dislodge any bugs and collect them in the net
  •  take the sample that you have just collected and put it in a 500 micron sieve
  • using the squirt bottle wash off all the dirt and mud into the waste bucket 
  • after washing the 500 micron sieve but the remaining sample into the sample bucket  


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