Aquatic Invertebrates - invasive

New Zealand Mudsnail (Potamopyrgus antipodarum) on Apr 29, 2013

Submitter has sample
EDRR Status: Local expert notified

Description of specimen

The snails are all around 4mm in length with 5 whirls. There were approximetly 100 snails recovered from the brown trout stomach.

Commentary

I saved around 20 specimens in ethanol, let me know if you'd like me to send them to you. I understand NZMS were found in Lake Billy Chinook several years ago, do you know the locations of that survey. Have they been identified in the Crooked River below Bowman Dam in the wild and scenic reach popular with fisherman?

Reporter
April 29, 2013, 4:30 a.m.

Location

The suspected NZMS were recovered from the stomach of a brown trout captured in the Crooked River Arm of Lake Billy Chinook (UTM) 0637051 4929474, near river kilometer 10 on April 17 2013. The fish was captured while gill netting to capture bull trout and other piscivores in LBC as part of a diet study (fish biologist from Portland General Electric).

Expert Reviewer

Robyn Draheim

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