1Nagasaki Prefectural Institute of Fisheries, Taira, Nagasaki 851-2213, 2Department of Aquatic Biosciences, Tokyo University of Fisheries, Minato, Tokyo 108-8477, 3Kamiura Station, Japan Sea-Farming Association, Kamiura, Minamiamabe, Ohita 879-2602, Japan
This experiment was conducted to investigate the differences in lipid compositions between hatchery reared and wild caught yellowtail Seriola quinqueradiata juveniles. The body excluding the stomach, intestine and pyloric cecum of 58- and 70-day-old juveniles produced at Nagasaki Prefectural Institute of Fisheries in 1999 (TL, 37-94mm) and those of juveniles caught from the coastal area of Kagoshima Prefecture in 1998 and Nagasaki Prefecture in 1999 (TL, 26-114mm) were analyzed.
The triglycerides content of the reared fish was higher than that of the wild ones. On the other hand, the amount of n-3HUFA, especially 22: 6n-3, in the reared fish was lower compared to the wild ones. High triglycerides contents may be effective for starvation tolerance of the reared fish. However, the low amount of n-3HUFA, especially 22: 6n-3, suggests poor vitality of the reared fish.