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首页> 外文期刊>North American Journal of Aquaculture >Growth and survivorship of larval zebrafish Danio rerio on processed diets
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Growth and survivorship of larval zebrafish Danio rerio on processed diets

机译：加工饮食中幼体斑马鱼Danio rerio的生长和存活

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Within the past decade the zebrafish or zebra danio Danio rerio has become a major vertebrate model for the study of developmental biology, neurobiology, and molecular genetics. Most research universities now include large zebrafish colonies where considerable resources are expended for their feeding and maintenance. Larvae are particularly labor intensive because they are commonly fed a live diet such as paramecia Paramecium sp. and brine shirmp Artemia sp. We evaluated 10 processed (i.e., nonliving) diets as alternatives to a live diet using the criteria of survivorship and growth during the 2-3 weeks following hatching. The test diets included commercial diets, two experimental diets, and freeze-dried brine shrimp. The control diet consisted of live paramecia and brine shrimp. Four experiments that varied in water exchange rate, aeration, and in the timing and method of diet delivery were conducted. No processed diet performed as well as the live-diet control when both larval survivorship and growth rate were considered. Furthermore, differences in water exchange rate and method of diet delivery were equally important in determining survivorship and growth as were differences among individual test diets. Under conditions when larval growth rate was similar to the live-diet control (high water exchange rate), survivorship was approximately 50 percent of the control value. Under conditions where larval survivorship was high (low water exchange rate), growth rate was 14-37 percent of the control value. Although no single test diet performed appreciably better than the others, the following general diet characteristics appeared to increase performance; resistance to breakdown, 200-400-#mu#m particle size, and a high residence time in the water column. Overall results suggest that processed diets for zebrafish larvae can be substituted for a live diet only if a decrease in either growth rate or survivorship is acceptable.
机译：在过去的十年中，斑马鱼或斑马danio Danio rerio已成为研究发育生物学，神经生物学和分子遗传学的主要脊椎动物模型。现在，大多数研究型大学都包括大型斑马鱼殖民地，在那里大量资源用于其饲养和维护。幼虫特别劳动密集型，因为它们通常被喂食诸如草履虫Paramecium sp。等活食。和卤水虾Artemia sp。我们使用孵化后2-3周内的生存和生长标准评估了10种加工（即非生活）饮食作为活食的替代品。测试饮食包括商业饮食，两种实验饮食和冻干盐水虾。对照饮食包括活寄生虫和盐水虾。进行了四个实验，这些实验的水交换速率，通气量，饮食的投放时间和方法都不同。当同时考虑幼虫存活率和生长速度时，没有加工饮食和活饮食控制一样好。此外，水交换速率和饮食分配方法的差异在确定存活率和生长方面也同样重要，个别测试饮食之间的差异也同样重要。在幼虫生长速率与活体饮食控制相似（高水交换率）的条件下，存活率约为控制值的50％。在幼虫存活率较高（低水交换率）的条件下，增长率为对照值的14-37％。尽管没有一种单一的测试饮食能比其他饮食更好地表现出来，但以下一般饮食特征似乎可以提高机能。耐分解性，200-400-＃μm的粒径以及在水柱中的高停留时间。总体结果表明，只有在生长速度或存活率下降可接受的情况下，斑马鱼幼虫的加工饮食才能代替活饮食。

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