The effect of docosahexaenoic and eicosapentaenoic acids in live food on the development of abnormal morphology in hatchery-reared brown sole Pseudopleuronectes herzensteini |
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Authors: | Satoh Nobukazu Takaya Yoshiyuki Takeuchi Toshio |
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Institution: | (1) Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato Tokyo, 108-8477, Japan;(2) Hokkaido Mariculture Fisheries Experimental Station, Muroran Hokkaido, 051-0013, Japan;(3) Present address: Hokkaido Mariculture Fisheries Experimental Station, Muroran Hokkaido, 051-0013, Japan |
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Abstract: | We examined the effect of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) on the rates of abnormal morphology in
juvenile brown sole Pseudopleuronectes herzensteini. Larvae during the D–E stages (15–24 days post hatching) were fed live food containing various amounts of DHA and/or EPA
prepared using emulsified oils (DHA ethyl ester, EPA ethyl ester, and corn oil). Larvae during the F–I stages were fed Artemia enriched with a commercial diet supplement. We found that DHA and EPA promoted larval development and improved the incidence
of morphological abnormalities in brown sole juveniles to a similar extent. However, DHA was more effective than EPA in preventing
the appearance of morphological abnormalities in brown sole. The incidence of normal morphology was clearly improved by an
increase of the DHA content in brown sole larvae at 25 days post-hatching. These results suggest that it is important to promote
larval development and feed larvae with live food containing high levels of DHA during the D–E stages to prevent morphological
abnormalities in brown sole juveniles. |
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Keywords: | Abnormal morphology Brown sole Developmental stage Docosahexaenoic acid Eicosapentaenoic acid Live food |
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