不同养殖水色对红螯螯虾稚虾存活、生长和体色的影响

Effects of aquaculture water color on survival,growth and body color of Cherax quadricarinatus juveniles

以经过曝气的透明自来水为养殖水体作为实验对照组,通过添加人工色素调控养殖水色(黄色、蓝色、绿色),探究了养殖水色对红螯螯虾(Cherax quadricarinatus)稚虾存活、生长和体色的影响。结果显示,对照组、黄色和蓝色实验组的成活率均约50%,绿色实验组的较低(33.33%,P<0.05)。绿色实验组的增重率、特定生长率、体长、体宽最大,显著高于对照组(P<0.05);黄色和蓝色实验组与对照组无显著差异(P>0.05)。养殖水色调控可显著改变稚虾体色:蓝色实验组稚虾体色偏向蓝色(△E=21.35),黄色(△E=18.23)和绿色(△E=17.35)实验组稚虾体色偏向黄色。红螯螯虾不同部位之间体色差异显著,背甲明度(L^(*))显著低于大螯和尾部;背甲红度(a^(*))高于大螯和尾部;尾部黄度(b^(*))高于大螯和背甲。蓝色水体可明显提高背甲的b^(*)。

In this study,transparent aerated running water was used as the control group,and artificial pigments were added to regulate the color of aquaculture water(yellow,blue,green)to explore the effects of aquaculture water color on the survival,growth and body color of juvenile Cherax quadricarinatus.The results show that the survival rates of the control group,yellow and blue experimental groups were all about 50%,while that of the green experimental group was lower(33.33%,P<0.05).The weight gain rate,specific growth rate,body length and body width of the green experimental group were the highest,significantly higher than those of the control group(P<0.05).There was no significant difference between the yellow and blue experimental groups and the control group(P>0.05).The body color of the blue experimental group was blue(△E=21.35),yellow(△E=18.23)and green(△E=17.35).There were significant differences in the body color between different parts of the juveniles,and the lightness value of carapace(L^(*))was significantly lower than that of the claw and tail;the redness value(a^(*))of carapace was higher than that of claw and tail;the yellowness value of tail(b^(*))was higher than that of claw and carapace.Blue water can improve the b^(*)value of carapace significantly.