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首页> 外文期刊>North American Journal of Aquaculture >Influences of cyclic, high temperatures on juvenile channel catfish growth and feeding.
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Influences of cyclic, high temperatures on juvenile channel catfish growth and feeding.

机译：周期性高温对少年channel鱼生长和摄食的影响。

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Effects of high summer temperatures on Channel Catfish Ictalurus punctatus are poorly understood, particularly for thermal regimes that mimic pond aquaculture conditions. Therefore, this study examined the effects of three cycling upper-range temperature regimes (23-27 degrees C, 27-31 degrees C, and 31-35 degrees C) characteristic of aquaculture environments in the Mississippi Delta. Feed conversion ratio, feed consumption, specific growth rate, activity levels, survival, and overall growth in terms of wet weight and TL were measured in fingerling channel catfish over an 8-week period in a flow-through, multiple-tank system. Specific growth rate, feed consumption, TL, and wet weight of fish increased significantly in the 27-31 degrees C treatment in contrast to the 23-27 degrees C and 31-35 degrees C treatments. Feed conversion ratio was lowest in the 27-31 degrees C treatment, whereas activity levels were highest in the 31-35 degrees C treatment. Survival significantly decreased for catfish in the warmest treatment compared with catfish in the coolest treatment. These results indicate that high temperatures decrease growth in Channel Catfish, largely due to reduced food consumption and feed conversion and increased levels of activity. Therefore, increases in temperatures, such as from climate change, present challenges to the culture and management of Channel Catfish.Digital Object Identifier http://dx.doi.org/10.1080/15222055.2012.732674
机译：夏季高温对海Channel鱼Ictalurus punctatus的影响知之甚少，特别是对于模仿池塘水产养殖条件的热疗。因此，本研究考察了密西西比河三角洲水产养殖环境的三种循环上限温度范围（23-27摄氏度，27-31摄氏度和31-35摄氏度）的影响。在流通的多罐系统中，在八周的时间里，在鱼种channel鱼中测量了饲料转化率，饲料消耗，比生长率，活性水平，存活率和总生长量（以湿重和TL表示）。与23-27摄氏度和31-35摄氏度的处理相比，在27-31摄氏度的处理中，鱼的比生长速率，饲料消耗，TL和湿重显着增加。饲料转化率在27-31摄氏度的处理中最低，而活性水平在31-35摄氏度的处理中最高。与温度最低的cat鱼相比，温度最高的treatment鱼的存活率显着降低。这些结果表明，高温降低了Channel鱼的生长，这主要是由于减少了食物消耗和饲料转化以及活动水平的提高。因此，诸如气候变化之类的温度升高对Channel鱼的养殖和管理提出了挑战。数字对象标识符http://dx.doi.org/10.1080/15222055.2012.732674

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