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Polydorid infestation in the flat oyster, Tiostrea chilensis: hyposaline treatment for an aquaculture candidate
Dunphy, B.J.; Wells, R.M.G.; Jeffs, A.G. (2005). Polydorid infestation in the flat oyster, Tiostrea chilensis: hyposaline treatment for an aquaculture candidate. Aquacult. Int. 13(4): 351-358
In: Aquaculture International. Springer: London. ISSN 0967-6120, more
Peer reviewed article  

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Keywords
    Oyster culture; Pest control; Boccardia acus (Rainer, 1973) [WoRMS]; Ostrea chilensis Philippi, 1844 [WoRMS]; PSE, New Zealand, North I., Manukau Harbour; Marine

Authors  Top 
  • Dunphy, B.J.
  • Wells, R.M.G.
  • Jeffs, A.G.

Abstract
    Attempts to commercially farm the Chilean oyster, Tiostrea chilensis in New Zealand are hampered by high levels of shell infestation by the polydorid polychaete, Boccardia acus. Wild stock in the warmer, northern waters of New Zealand typically present a mean of 8.6±,0.7 worms per right upper valve from an early stage of development (~17 mm shell height). Both hypersaline and freshwater treatments were effective in reducing worm numbers, but freshwater treatment for 180–300 min was most effective and resulted in >98% worm mortality without producing any obvious harmful effects on the oyster. Hyposaline treatment is therefore recommended as a simple and cost-effective method for the control of B. acus in farmed T. chilensis.

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