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Published byMaude Davis Modified over 9 years ago
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Benthic Macroinvertebrate Sampling
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Sampling -WHAT All available invertebrate taxa in the entire 200 foot stream reach -WHERE All available habitats in sample area Riffles Runs Pools Along stream margins
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Capturing Specimens Find larger substrates rocks, woody debris, leaf packs Place net with small mesh downstream Gently disturb substrate upstream Capture dislodged specimens in net Collect 30 minutes minimum
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Specimens in Net Rinse net remove small particles Dump left over debris in white pan Rinse net into pan Catch smaller quicker organisms with pipette 1 Collect until no new taxa observed (minimum 30 minutes)
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Filling out PHWH Form Record the presence and abundance For all taxa Record this on the HMFEI Scoring Sheet Record Family or Genus For mayfly, caddisfly, stonefly groups
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Voucher Specimens What are they? a preserved specimen a basis for further study evidence of validity of collection and identification a part of a permanent collection
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How to preserve Materials Jars Tags Pencil Fluid Methods Place specimen(s) in jar Fill out tag Place tag in jar Add fluid to top Close tightly
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Information for Field Tags Date Collector’s Name County Township Stream Identification
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