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FW: mollusca Polydora Infestation

Geoff Read g.read at niwa.cri.nz
Thu Dec 14 18:46:47 EST 2000

[CC to cfprmb at aisl.bc.ca]

> I am wondering if anyone can advise me on what to do about a Polydora 
> infestation on Abalone broodstock. 

Depends what harm the worms are doing, in what way, and what species 
of Polydora. The message doesn't say. Wild Haliotis iris in New Zealand 
tolerate quite enormous populations of various Polydora & Boccardia, and 
one would be hard put to demonstrate a negative effect apart from a 
tolerable shell weakening.  Normally inner shell blisters don't occur. But in 
hatchery culture one very probably wouldn't want worms establishing on the 
youngest abalone.  Simple air drying for several hours as a treatment  for 
40 mm abalone has been used successfully in an Australian study.          

  Geoff Read <g.read at niwa.cri.nz>

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