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Control of predacious flatworms Macrostomum sp. in culturing juvenile freshwater mussels

North American Journal of Aquaculture

By:
, ,
DOI: 10.1577/1548-8454(2003)065<0028:COPFMS>2.0.CO;2

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Abstract

Flatworms of the genus Macrostomum are voracious predators on newly metamorphosed juvenile freshwater mussels (Unionidae), which require a fish host to transform mussel larvae into free-living juveniles. Toxicity tests were performed with formalin (paracide-F, 37% formaldehyde) to determine the appropriate levels of treatment for eradicating these flatworms from host fish tanks without adversely affecting the culture of juvenile mussels. Results indicate that a 1-h shock treatment of 250 mg/L formalin or a 3-d continuous exposure to 20 mg/L of formalin kills adult Macrostomum but not fish. Observations indicate that a single treatment is insufficient to kill Macrostomum eggs, so a second treatment after 3 d is necessary to kill newly hatched flatworms. Newly metamorphosed freshwater mussels exposed to similar shock and continuous treatments of formalin were also killed. Thus, all host fish introduced for the purpose of mussel production should be quarantined and treated prophylactically to avoid the infestation of mussel culture systems with predacious flatworms.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Control of predacious flatworms Macrostomum sp. in culturing juvenile freshwater mussels
Series title:
North American Journal of Aquaculture
DOI:
10.1577/1548-8454(2003)065<0028:COPFMS>2.0.CO;2
Volume
65
Issue:
1
Year Published:
2003
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
28
Last page:
32
Number of Pages:
5