摘要
为了实现卤虫生产从捕捞到人工养殖的转变,环境因子对其代谢的影响亟待研究。文章围绕环境因子(不同光照、温度及盐度)对卤虫呼吸生理的影响展开研究,分别采用隔膜电极法、改良次溴酸盐氧化法测定养殖水体的溶解氧量和氨氮含量,计算得到卤虫的耗氧率(Oxygen consumption rate,OCR)及排氨率(Ammonia excretion rate,AER),分析光照、温度及盐度对卤虫代谢的影响。结果表明,卤虫的窒息点随着温度的升高而升高;有无光照对卤虫的耗氧率影响较大,卤虫的排氨率与光照强度成正相关关系;温度对卤虫耗氧率和排氨率影响的回归方程式分别为OCR=-0. 133 1x2+0. 964 5x-0. 190 4,R2=0. 918 5、AER=-4. 892 9x2+63. 007x+26. 3,R2=0. 995 8。盐度对卤虫的代谢无明显影响,可能与其具有良好的盐度适应性和极强的稳态调节能力相关。
In order to achieve the transition from catch to artificial aquaculture in Artemia production,it is necessary to study the effects of environmental factors on its metabolism. This study focused on the effects of environmental factorson the respiratory physiology of A. salina. Brine shrimps are arranged in different temperatures,salinities and illumination intensities. The dissolved oxygen contents and ammonia nitrogen contents were measured respectively by diaphragm electrode method and modified hypobromide oxidimetry method. The values of OCR and AER should be attain by calculating. They are used to analyse the effects of the metabolism on illumination,temperature and salinity in A. salina. The results showed that the asphyxiant point of A. salina increased with increasing temperature; the presence or absence of light have a greater effect on the OCR of A. salina; the AER of A. salina is positively correlating with the light intensity; The regression equations about effects of OCR and AER in A. salina on temperature are OCR =-0. 133 1 x2+ 0. 964 5 x-0. 190 4,R2= 0. 918 5,AER =-4. 892 9 x2+ 63. 007 x + 26. 3,R2= 0. 995 8. The salinity have no prominent influence to metabolism in A. salina,which is maybe related to the better salinity adaptation and the stronger osmoregulation.
引文
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