Nippon Suisan Gakkaishi 78 (2), 241-245 (2012)

Feeding trial of red sea bream with dioxin-reduced fish oil

TOMOKI HONRYO,1* HIROSHI YAMAMOTO,2 ATSUNORI KUMANISHI,2
HIDEKI HIROSE2 AND YOSHIFUMI SAWADA1

1Oshima Experiment Station, Fisheries Laboratory of Kinki University, Kushimoto, Wakayama 649-3633, 2Ueda Oils and Fats MFG Co., Ltd., Kobe, Hyogo 658-0024, Japan

It is important to produce safe cultured fish by reducing their dioxin content. We investigated the reduction of dioxin content in cultured red sea bream Pargus major by feeding artificial diets containing two sorts of fish oil with different dioxin content: CT (3 pg-TEQ/g) and MD (18 pg-TEQ/g). There was no significant difference in the growth, survival, and feeding indices between the CT and MD fed groups. The content of dioxins in the muscle significantly decreased in the CT fed group (0.07 pg-TEQ/g) compared with the initial content (0.14 pg-TEQ/g), whereas that in the MD fed group increased to 0.30 pg-TEQ/g. This effect was particulary clear in the liver. These results demonstrated the possibility of producing cultured fish with low content of dioxins by feeding low-dioxin fish oil.


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