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There are many problems to be solved for the establishment of more feasible and simplified method of seed production of marine fishes. One of the most important tasks in seed production is to clarify the feeding ecology of larvae and juveniles under. rearing conditions.
In the present study, two groups of postlarvae-juveniles of the flounder, Paralichthys olivaceus were used. One ranging 11.38 to 17.08 ㎜ in mean total length was fed with Artemia nauplii at two different water temperatures (19 to 21 ℃ and 24 to 25 ℃) and the other ranging 4.39 to 10.64 ㎝ in mean total length was fed with prepared diet.
Time required from the start of feeding to satiation was 45 to 55 minutes at 24 to 25 ℃ and nearly one hour at 19 to 21 ℃. Mean numbers of Artemia nauplii in digestive tract were 236 to 375 individuals per fish at 24 to 25 ℃. The amount of food remained in the intestine was 24.8 % of the total food in the digestive tract.
In juveniles of 4.39 to 10.64 ㎝ in mean total length, amount of prepared diet consumed at satiation was 0.04 to 0.46 g per fish.
Digestive tract index in juveniles was rapidly decreased for 24 hours after satiation and kept nearly constant after 48 hours, showing that the time to completely digest the prepared diet in juveniles was estimated to be about 48 hours.
In the present study, two groups of postlarvae-juveniles of the flounder, Paralichthys olivaceus were used. One ranging 11.38 to 17.08 ㎜ in mean total length was fed with Artemia nauplii at two different water temperatures (19 to 21 ℃ and 24 to 25 ℃) and the other ranging 4.39 to 10.64 ㎝ in mean total length was fed with prepared diet.
Time required from the start of feeding to satiation was 45 to 55 minutes at 24 to 25 ℃ and nearly one hour at 19 to 21 ℃. Mean numbers of Artemia nauplii in digestive tract were 236 to 375 individuals per fish at 24 to 25 ℃. The amount of food remained in the intestine was 24.8 % of the total food in the digestive tract.
In juveniles of 4.39 to 10.64 ㎝ in mean total length, amount of prepared diet consumed at satiation was 0.04 to 0.46 g per fish.
Digestive tract index in juveniles was rapidly decreased for 24 hours after satiation and kept nearly constant after 48 hours, showing that the time to completely digest the prepared diet in juveniles was estimated to be about 48 hours.
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UCI(KEPA) : I410-ECN-0101-2009-529-015298649