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首页> 外文期刊>Journal of the World Aquaculture Society >Influence of salinity on survival, growth, hemolymph osmolality, gill sodium potassium ATPase activity, and sodium potassium chloride co-transporter expression in the redclaw crayfish Cherax quadricarinatus
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Influence of salinity on survival, growth, hemolymph osmolality, gill sodium potassium ATPase activity, and sodium potassium chloride co-transporter expression in the redclaw crayfish Cherax quadricarinatus

机译：盐度对生存，生长，血小秋渗透压钠钾ATP酶活性的影响，氯化氢钠氢钠，氯化钾共转运蛋白表达在RedClaw小龙虾雌蕊Quadricarinatus

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The Australian redclaw crayfish Cherax quadricarinatus is a freshwater crustacean aquacultured in many countries. Redclaw crayfish are often exposed to saline waters in attempts to improve flavor, to relieve stress during transport, and to prevent or treat parasitic infestations. However, the effect of salinity on the crayfish osmoregulatory process is not well studied. In the present work, we assessed the effect of various salinities on survival, growth, and osmoregulation in redclaw crayfish. Adult crayfish were maintained at seven salinities (0, 2, 4, 6, 8, 10, and 12 ppt) for 4 weeks, and hemolymph osmolality, gill sodium potassium ATPase activity, and sodium potassium chloride cotransporter expression were assessed. In another experiment, juvenile crayfish were size sorted to similar weights and stocked at four salinities (0, 2, 4, and 6 ppt) for 8 weeks. The animals were group weighed every 2 weeks and individually weighed at the end of the eighth week. Hemolymph osmolality was constant as salinity increased from 0 to 10 ppt then a significant increase was observed at 12 ppt. Redclaw growth rate decreased with an increase in salinity from 0 to 6 ppt. Sodium potassium ATPase activity and sodium potassium chloride cotransporter expression increased with salinity increase. Although salinity might help treat ectoparasites, improve taste, and reduce transportation stress, long-term exposure increases osmoregulatory metabolic costs and affects growth and energy consumption.
机译：澳大利亚红螯小龙虾Cherax quadracarinatus是一种淡水甲壳动物，在许多国家都有养殖。红螯小龙虾经常暴露在盐水中，试图改善风味，缓解运输过程中的压力，并预防或治疗寄生虫感染。然而，盐度对小龙虾渗透调节过程的影响还没有得到很好的研究。在目前的工作中，我们评估了不同盐度对红爪螯虾存活、生长和渗透调节的影响。成年小龙虾在7个盐度（0、2、4、6、8、10和12 ppt）下保持4周，并评估血淋巴渗透压、鳃钠钾ATP酶活性和氯化钠钾协同转运蛋白表达。在另一个实验中，幼年小龙虾按相似的重量大小分类，并在四个盐度（0、2、4和6 ppt）下饲养8周。各组动物每2周称重一次，第8周结束时分别称重。当盐度从0增加到10 ppt时，血淋巴渗透压保持不变，然后在12 ppt时观察到显著增加。红爪鱼的生长速度随着盐度从0到6 ppt的增加而降低。随着盐度的增加，钠钾ATP酶活性和氯化钠钾共转运蛋白的表达增加。虽然盐度可能有助于治疗体外寄生虫，改善味觉，减少运输压力，但长期暴露会增加渗透调节代谢成本，并影响生长和能量消耗。

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