池塘循环水养殖对混养草鱼食用品质的影响

为探究养殖模式对草鱼(Ctenopharyngodon idellus)鱼肉品质的影响,实验对两种养殖模式下(传统池塘养殖和池塘循环水养殖)草鱼的食用品质进行了差异比较。结果表明,循环水养殖草鱼肌肉白度和弹性高于传统池塘养殖的草鱼,且其不饱和脂肪酸和必需氨基酸含量均显著高于传统池塘养殖;其中, n-3和n-6系列不饱和脂肪酸含量显著高于传统池塘养殖草鱼,是其1.2倍,使得草鱼的肌肉品质和营养品质更佳。此外,循环水养殖可降低草鱼中带有土腥味和青草味的己醛、庚醛和1-辛烯-3-醇等物质的含量,且鲜味核苷酸(IMP)含量高于传统池塘养殖草鱼,使得草鱼的风味更鲜美、浓厚。研究表明,循环水养殖草鱼的肌肉品质和营养特性均优于传统池塘养殖。

RECIRCULATING AQUACULTURE POND ON EDIBLE QUALITY OF POLYCULTURE GRASS CARP (CTENOPHARYNGODON IDELLUS)

In order to explore the influence of farming mode on the quality of grass carp (Ctenopharyngodon idellus), a comparative study was conducted on edible quality of grass carp between traditional pond farming and recirculating aquaculture system. The results showed that the muscle quality and edible quality of grass carp farmed in recirculating water were better than those farmed in the traditional pond. The whiteness and springiness of recirculating aquaculture grass carp were higher than those of traditional pond farmed grass carp, the contents of unsaturated fatty acids and essential amino acids in recirculating water aquaculture grass carp were significantly higher than those in the traditional pond. The contents of n-3 and n-6 unsaturated fatty acids in recirculating water aquaculture grass carp were significantly higher than those in the traditional pond grass carp, indicating better nutritional characteristics and better muscle quality. Besides, the contents of the total amino acids in recirculating cultured grass carp was significantly higher than that of traditional cultured grass carp, which made grass carp have higher nutritional characteristics. The contents of protein in grass carp cultured by recirculating aquaculture was higher, in line with contemporary nutrition. Recirculating aquaculture could reduce the contents of hexanal, heptanal and 1-octen-3-ol in grass carp with off-odor, and the content of hypoxanthine nucleotide (IMP) was higher than that in the traditional pond, which made grass carp taste more delicious and dense. The results showed that the muscle quality and nutritional characteristics of grass carp farmed in recirculating water were better than those of the traditional pond.