| 饵料密度对卜氏晶囊轮虫种群数量变动和生产力的影响 |
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| 引用本文： | 周一兵.饵料密度对卜氏晶囊轮虫种群数量变动和生产力的影响[J].水产学报,2002,26(1):28-34. |
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| 作者姓名： | 周一兵 |
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| 作者单位： | 大连水产学院农业部海洋水产增养殖生态学重点开放实验室,辽宁大连,116023 |
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| 基金项目： | 辽宁省科学技术基金项目资助 (9810 10 0 3 0 1) |
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| 摘 要： | 饵料密度实验表明 ,在 2 8℃下 ,当草履虫密度分别为 10 0cell·mL-1(77mg·L-1)、2 0 0cell·mL-1(15 4mg·L-1)、30 0cell·mL-1(2 31mg·L-1)和 4 0 0cell·mL-1(30 8mg·L-1)时 ,卜氏晶囊轮虫在群体培养条件下的最大持续产量 (MSY)、水体容纳量、种群增长期的平均生产量和增长率均以饵料密度 30 0cell·mL-1组为最高 ,分别为 :6 .4ind·mL-1·d-1(35 5mg·L-1·d·-1)、13.7ind·mL-1(76 0 .6mg·L-1)、5 5 (mg·L-1·d·-1)和 1.4 4 96 (d-1)。实验结果还表明 ,在饵料密度 10 0～ 30 0cell·mL-1范围内 ,种群的最大持续产量 (MSY)、达到最大持续产量时的生物量 (CSC)和达到MSY及容纳量的时间均随饵料密度增加而提高或延长。但是 ,当饵料密度达到 4 0 0cell·mL-1时 ,上述指标反而降低或缩短。以草履虫为饵时晶囊轮虫的日粮为 14 6 %～ 70 7% ,饵料系数 19.8～91.7。
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| 关 键 词： | 卜氏晶囊轮虫 生产量 种群波动 饵料密度 浮游动物 鱼饵 |
| 文章编号： | 1000-0615(2002)01-0028-07 |
| 收稿时间： | 2014/4/11 0:00:00 |
| 修稿时间： | 2001年5月24日 |
The effect of food concentration on population fluctuation and productivity of Asplanchna brightwelli |
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| ZHOU Yi bing.The effect of food concentration on population fluctuation and productivity of Asplanchna brightwelli[J].Journal of Fisheries of China,2002,26(1):28-34. |
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| Authors: | ZHOU Yi bing |
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| Institution: | The Key Laboratory of Maricultural Ecology Certificated by the Ministry of Agriculture, Dalian Fisheries University, Dalian 116023, China |
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| Abstract: | The influences of food concentration on populat ion fluctuation and production of cannibalism,
Asplanchna brightwelli were studied. It was found that, in the cumulative culture , the population dynamic of A.
brightwelli fed on Paramecium of concentrat ions ranging from 100 to 400cell#mL- 1 displayed typical 0s0 curves
in the course of the experiment , and the relationship between the population persistence production and standing
crop were conic function. With reference to food density experiments, there were the highest value of maximum
sustained yield( MSY) , capacity ( K) , average production or intrinsic rates of increase of population under 300
Paramecium#mL
- 1
in the whole diet concentration, which were 6. 4indiv#mL
- 1#d
- 1
( 355mg#L
- 1
) , 13. 7ind#
L- 1( 760. 6mg#L- 1) , 55 mg#L- 1 and 1. 4496( d- 1) respectively. In the range of 100- 300cell#mL- 1, the
MSY, critical standing crops and the time arrival to MSY or K increased with increment of diet concentration,
whereas the above ment ioned indexes decreased in 400cell#mL- 1 of food density. Fed on Paramecium, the value
of food rat ion of rotifers changed 146% ~ 707% of body weight , with average 390%; food coeff icient was 19. 8
- 91. 7. |
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| Keywords: | Asplanchna brightwelli production population fluctuation food concentration |
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