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TECHNIQUES FOR REARING MARGINED MADTOM FRY

机译：腌制炸薯条的技术

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摘要

The margined madtom Noturus insignis was used as a model species to develop methods for rearing madtoms in the laboratory. Commercial flake food, salmon starter, Larval AP100, Kyowa Fry Feed, and brine shrimp Artemia sp. were tested as diets. In rearing trials, mean growth rates of fry ranged from 0.17 to 0.58 mm/d, and the fastest growth rates were obtained with brine shrimp as part or all of the diet; however, the highest survival was obtained with a diet of salmon starter. Approximately half of the total fry mortality occurred within the first 2 d in feeding trials, and mortality after 5 d was low. Tanks apparently need to be thoroughly cleaned twice daily to ensure good survival of larvae and fry. The rearing system used in this study and a stocking density of only one fish per 2 L of water precluded large die-offs, even when parts of the system failed. Twice-daily feedings of 300-400 mg of salmon starter per 38-L tank, supplemented with about five brine shrimp nauplii per milliliter, are recommended for rearing madtom larvae to 2-3 weeks of age. After that time, a diet of salmon starter is suitable for rearing larvae to the juvenile stage.
机译：边缘的madtom Noturus insignis被用作模型物种，以开发实验室中饲养madtoms的方法。商业片状食品，鲑鱼起子，幼虫AP100，协和鱼苗饲料和卤水虾Artemia sp。被测试为饮食。在饲养试验中，鱼苗的平均生长速率在0.17至0.58 mm / d的范围内，使用盐水虾作为日粮的一部分或全部时，生长速度最快。然而，鲑鱼发酵剂的饮食能获得最高的存活率。鱼苗总死亡率的大约一半发生在饲养试验的前2天之内，而5天后的死亡率很低。显然，水箱每天需要彻底清洗两次，以确保幼虫和鱼苗的良好存活。本研究中使用的饲养系统和每2升水仅放养一条鱼的能力可以避免大量的死亡，即使系统的某些部分出现故障也是如此。建议将每只38升水箱的鲑鱼起子每日两次喂食300-400毫克，并每毫升补充约五只盐水虾无节幼体，以将tom虾幼体饲养至2-3周龄。在那之后，鲑鱼发酵剂的饮食适合将幼体饲养到幼年期。

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