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首页> 外文期刊>African Journal of Aquatic Science >Effect of salinity on growth of juvenile silver kob, Argyrosomus inodorus (Teleostei: Sciaenidae).
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Effect of salinity on growth of juvenile silver kob, Argyrosomus inodorus (Teleostei: Sciaenidae).

机译：盐度对少年银鳕鱼（Telostei：Sciaenidae）生长的影响。

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摘要

As part of the evaluation of new aquaculture species, the effect of environmental factors on growth, food conversion ratio and survival should be tested. In this study silver kob, Argyrosomus inodorus, were reared for 98 days at three salinities, of 15, 25, and 35, at an average water temperature of 18 degrees C. Fish were fed to satiation twice daily. There were no differences between treatments in mass gain, feed conversion ratio, feeding intensity (% body mass d-1), blood osmolality, or survival. During the first 84 days there was also no difference in length gain (mm d-1) between treatments although the last 14 days of the study suggested a small but significantly higher average length in fish from the 25-salinity treatment. Silver kob grew at a rate of 0.31 to 0.37 mm d-1 and food conversion ratio averaged 2.33 kg food per kg gain at a feeding intensity of 1.6% body mass d-1. Blood osmolality did not differ between fish reared at different salinities. We conclude that silver kob perform at least as well at reduced salinities as in full strength seawater. This could lead to significant cost savings when rearing fish inland using artificial seawater.
机译：作为评估新水产养殖种类的一部分，应测试环境因素对生长，食物转化率和存活率的影响。在这项研究中，银鳕鱼（i.Argyrosomus inodorus ）在15、25和35的三种盐度下平均水温为18摄氏度，饲养了98天。每天将鱼喂饱2次。增重，饲料转化率，饲喂强度（％d -1 ），血液渗透压浓度或存活率之间的处理无差异。在最初的84天中，各处理之间的长度增加（mm d -1 ）也没有差异，尽管研究的最后14天表明，从25-盐度处理。角粒的生长速率为0.31至0.37 mm d -1 ，食物转化率平均为每公斤增重2.33千克食物，饲喂强度为d -1 。在不同盐度下饲养的鱼之间的血液渗透压浓度没有差异。我们得出的结论是，银鳕鱼的盐度至少与全强度海水一样好。使用人工海水在内陆养殖鱼时，这可以节省大量成本。

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