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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국수산과학회 양식분과 한국양식학회지 한국양식학회지 제10권 제4호
발행연도
1997.11
수록면
449 - 456 (8page)

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This study was conducted to determine the optimal conditions for raising the freshwater rotifer, Brachionus calyciflorus. The authors presented some biological information obtaind from incubation experiment under the various controlled temperatures.
Lorica size of the rotifer was divided into two groups ; the length and the width for the S-type was 141.0±16.7 ㎛ (110.1-182.5 ㎛, n=44) and 107.0±20.3 ㎛ (75.3-152.3 ㎛, n=44), and those for the L-type was 262.8±15.2 ㎛ (234.4-288.6 ㎛, n=20) and 182.6±13.4 ㎛ (159.8-207.0 ㎛, n=20), respectively.
The number of eggs being attached on the female varied from 1 to 11 at various culture conditions. Egg type was divided into two groups, large and small. Large and small egg was measured in its major axis as 85.7-107.8 ㎛ and 55.1-65.2 ㎛ for S-type, and 104.9-121.8 ㎛ and 62.8-89.1 ㎛ for L-type respectively.
The maximum density was reached at 4th day after incubation. The density was 583.9 rotifers/ml for 25℃-experimental. group and 421.3 rotifers/ml for 22℃-experimental. group respectively. In the case of 28℃-experimental. group, it suddenly decreased into 4.7 rotifers/ml at 1st day after incubation and did not recover to its initial density.
The maximum rate of increase of population per day was reached 0.802 for 22℃-experimental. group at day 2 and fluctuated thereafter. For 25℃-experimental. group it increased to 0.964 at day 3 of incubation and then declined. And the egg ratio of female was reached the maximum of 0.614 for 22℃- at 3rd day and 0.772 for 25℃-experimental. group at 4th day of incubation.

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UCI(KEPA) : I410-ECN-0101-2009-529-015350115