| 饥饿胁迫对杂交鳢生长及生化组成的影响 |
| Effects of Starvation Stress on Growth and Biochemical Compositions in Hybrid Snakehead |
| 投稿时间：2012-05-28 修订日期：2012-09-16 |
| DOI： |
| 中文关键词:杂交鳢 饥饿胁迫 生长 生化组成 |
| 英文关键词:Hybrid snakehead starvation stress growth biochemical compositions |
| 基金项目:广东省部产学研结合项目(2011B090400270);清远市科技计划项目(2011C011106009) |
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| 中文摘要: |
| 水温25.8～30.0℃,将初始体重91.6～125.1g、体长18.6～23.2 cm的杂交鳢(Hybrid snakehead)置于玻璃缸水槽中饥饿处理9周,探索饥饿胁迫对其生长(饥饿9周)和生化组成(饥饿7周)的影响。结果表明,饥饿处理9周后,各组的存活率均为100%;其体重的损失率随饥饿时间的延长显著上升(P<0.05),饥饿至第9周时达(20.32±2.16)%;肥满度、脏体比、肝体比和脂体比随饥饿时间的延长呈下降趋势,各试验组与对照组相比均差异显著(P<0.05);饥饿0～7周,杂交鳢全鱼水分含量逐步上升,饥饿开始时为68.26%,至第7周时达72.51%;灰分含量有所增加,但增幅不明显;脂肪、蛋白质和比能值均呈下降趋势;其中,脂肪含量和比能值下降较为明显,饥饿至第7周时,与对照组相比,分别下降了32.46%和22.56%;蛋白质含量在饥饿前期下降不明显,饥饿5～7周内显著下降(P<0.05)。判断杂交鳢在整个饥饿过程中,主要是利用自身的脂肪作为能源物质,同时也会消耗少量的蛋白质。 |
| 英文摘要: |
| In this study， hybrid snakeheads (body weight: 91.6一125.1 g , body length:18. 6一23.2 cm ) were put on starvation for nine weeks in glass tanks with water temperature of 25. 8一30. 0℃，for investigating the effects of starvation stress On their growth(treated for 9 weeks) and biochemical compositions(treated for 7 weeks). Results showed that: after the starvation treatment for 9 weeks , the survival rates were 100% in all groups; body weight loss rates increased with the increase of starvation time and reached to(20.32 ±2.16)% at the ninth week ; the condition factor (CF) ,viscerosomatic index (VI) , hepatosomatic (HSI) and intraperitoneal index (IPI) declined with the increasing of starvation time; there were significant differences in these four indexes between treatment groups and the control group(P<0.05); from the zero week of starvation to the seventh week of starvation，the moisture content of hybrid snakehead gradually increased from 68. 26% to 72. 51%;ash content was also increased but not significant; lipid，protein and energy contents all declined，whilst Lipid and energy contents declined obviously; at the seventh week of starvation，these two indexes decreased by 32. 46% and 22. 56%，respectively，comparing to the control group; the declining of protein was not significant in the early stage of starvation until the treatment came to 5-7 weeks. It was inferred that during the starvation mainly used lipid as the major energy source ,meanwhile , a small amount of protein was also consumed. |
| 周爱国,茅沈丽,王 超,邹 青,曾运丁,邹记兴.2012.饥饿胁迫对杂交鳢生长及生化组成的影响[J].水生态学杂志,33(5):78-82. |
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