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首页> 外文期刊>North American Journal of Aquaculture >Growth and acute temperature tolerance of June Sucker juveniles fed varying dietary protein and lipid levels with and without supplemental dicalcium phosphate.
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Growth and acute temperature tolerance of June Sucker juveniles fed varying dietary protein and lipid levels with and without supplemental dicalcium phosphate.

机译：在有或没有补充磷酸氢钙的情况下，朱克·萨克（June Sucker）幼鱼的生长和急性温度耐受性都改变了他们的饮食蛋白质和脂质水平。

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Reports from hatcheries have demonstrated that commercially available diets are inadequate for June Suckers Chasmistes liorus and suggest that fish quality can be improved through species-specific diet optimization. To determine dietary protein and lipid levels for juvenile June Suckers, practical-type diets were formulated with 35, 40, or 45% protein and 8, 12, or 16% lipid and tested in a 3x3 factorial design. Two additional diets (45% protein and 16% lipid [45:16] without dicalcium phosphate supplementation and 45:16 with 2 x dicalcium phosphate) were formulated to test the necessity of dicalcium phosphate supplementation. Each diet was fed to three replicate tanks (average initial fish weight+or-SD=4.48+or-0.24 g) of fish per treatment (85 fish/tank); only duplicate tanks were used for the nondicalcium phosphate-supplemented treatment. Fish were reared in 80-L tanks supplied with 4 L/min of 22 degrees C spring water and fed 6-4% body weight (BW)/d by automated belt feeders, 6 d/week. At the end of 12 weeks of culture, tissue samples were obtained to determine nutrient partitioning. An acute temperature challenge was also conducted to investigate dietary adequacy. Significant effects of diet on growth and temperature tolerance were observed. Fish fed the diet with 45% crude protein gained more weight than did fish fed 40% or 35% crude protein, and fish fed 16% dietary lipid gained more weight than did fish fed 12% and 8% crude lipid. However, the composition of this growth indicated that fish fed the 16% lipid stored larger amounts of lipid in both the visceral cavity and the muscle. A significant negative interactive effect of dietary protein and lipid on temperature tolerance was observed at 45% crude protein and 16% lipid. Results of this study define acceptable ranges of dietary protein and lipid for juvenile June Suckers and provide culturists information to make better choices regarding appropriate diets for this species.Digital Object Identifier http://dx.doi.org/10.1080/15222055.2012.736449
机译：孵化场的报告表明，商业上可获得的日粮不足以满足6月吮吸者Chasmistes liorus的需求，并建议通过优化特定种类的日粮来改善鱼类质量。为了确定6月幼雏的日粮蛋白质和脂质水平，将实用型日粮配制为35、40或45％的蛋白质和8、12或16％的脂质，并以3x3析因设计进行测试。配制了另外两种日粮（不添加磷酸氢钙的45％蛋白质和16％脂质[45:16]，和添加2 x磷酸氢钙的45:16）来测试添加磷酸氢钙的必要性。每种饮食都按每个处理（85条鱼/罐）喂入三个重复的鱼缸（平均初始鱼重+ -SD = 4.48 + -0.24克）。仅重复的水箱用于非磷酸二钙补充处理。将鱼放在装有4升/分钟的22摄氏度泉水的80升水箱中进行饲养，并通过自动皮带喂食器以6 d /周的速度喂食6-4％体重（BW）/ d的鱼。培养12周结束时，获得组织样品以确定营养物分配。还进行了急性温度挑战以调查饮食是否充足。观察到饮食对生长和温度耐受性的显着影响。饲喂日粮含45％粗蛋白的鱼比饲喂40％或35％粗蛋白的鱼增加更多的体重，饲喂16％膳食脂质的鱼比饲喂12％和8％粗脂质的鱼增加更多的体重。但是，这种生长的组成表明，饲喂16％脂质的鱼​​在内脏腔和肌肉中都储存了大量的脂质。在45％的粗蛋白和16％的脂质下，观察到饮食蛋白和脂质对温度耐受性的显着负面相互作用。这项研究的结果确定了6月幼雏的膳食蛋白质和脂质的可接受范围，并为栽培者提供了信息，以便为该物种的适当饮食做出更好的选择。数字对象标识符http://dx.doi.org/10.1080/15222055.2012.736449

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