Journal
AQUACULTURE
Volume 238, Issue 1-4, Pages 83-95Publisher
ELSEVIER
DOI: 10.1016/j.aquaculture.2004.05.015
Keywords
Neobenedenia girellae; Verasper variegatus; Paralichthys olivaceus; susceptibility; praziquantel; treatment
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This study investigated the susceptibility of spotted halibut Verasper variegatus (Pleuronectidae) to infection by the capsalid monogenean Neobenedenia girellae and sought an effective treatment method against this monogenean species in advance of its culture to enable a stable production of V variegatus by fanning. Our results showed that V variegatus is susceptible to N. girellae. In oral therapy trials, the anthelmintic praziquantel in feed was found to be antiparasitic against infestation by N. girellae on V variegatus, and a low-dose treatment for a long period, such as 40 mg/kg body weight (BW)/day for 11 days, was more effective compared with treatment of a high dose for a short period (i.e., 150 mg/kg BW/day for 3 days). The number of N girellae on V variegatus was significantly lower than for Japanese flounder Paralichthys olivaceus (Paralichthyidae) when both species were exposed to oncomiracidia in the same aquarium. Considering the lower susceptibility of V variegatus for this parasite species and the effectiveness of using praziquantel, V variegatus may be a promising species for stable production by aquaculture. (C) 2004 Elsevier B.V. All rights reserved.
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