Kujawa Roman, Piech Przemysław
Department of Ichthyology and Aquaculture, Faculty of Animal Bioengineering, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland.
Animals (Basel). 2022 Sep 5;12(17):2299. doi: 10.3390/ani12172299.
The effect of water with a salinity 3, 5, 7, 9 and 11 ppt on the growth and survivability of asp (L.) larvae was investigated. A control sample consisted of asp larvae reared up in freshwater (0 ppt). Larvae were fed for 21 days with nauplii of the brine shrimp . Water salinity was observed to have a considerable effect on the growth and survivability of asp larvae. In addition, saline water extended the life span of nauplii, which resulted in their prolonged availability to asp larvae. Asp larvae showed low tolerance to the salinity of water, reaching 9-11 ppt. Depending on the degree of salinity, the mean final weight of larvae varied from 122.6 to 139.4 mg, at body lengths from 23.8 to 25.6 mm, respectively. The best body length increments were recorded among asp larvae maintained in water with a salinity of 3 ppt. Depending on the level of water salinity, the final survivability of asp larvae ranged from 16.9 to 94.5%. The highest and increasing mortality was demonstrated among the larvae reared in water of the salinity equal to 11 ppt. It is not recommended to rear asp larvae in water with a salinity above 7 ppt due to the low survivability and large differences in the body size of the larvae that managed to survive.
研究了盐度为3、5、7、9和11ppt的水对欧洲鳇（L.）幼鱼生长和存活能力的影响。一个对照样本由在淡水（0ppt）中饲养的欧洲鳇幼鱼组成。幼鱼用卤虫无节幼体喂养21天。观察到水的盐度对欧洲鳇幼鱼的生长和存活能力有相当大的影响。此外，盐水延长了无节幼体的寿命，这使得它们对欧洲鳇幼鱼的可利用时间延长。欧洲鳇幼鱼对水的盐度耐受性较低，盐度达到9 - 11ppt。根据盐度的不同，幼鱼的平均最终体重分别在122.6至139.4毫克之间，体长在23.8至25.6毫米之间。在盐度为3ppt的水中饲养的欧洲鳇幼鱼中记录到最佳的体长增长。根据水的盐度水平，欧洲鳇幼鱼的最终存活率在16.9%至94.5%之间。在盐度等于11ppt的水中饲养的幼鱼中死亡率最高且呈上升趋势。由于存活率低以及存活幼鱼的体型差异大，不建议在盐度高于7ppt的水中饲养欧洲鳇幼鱼。
