Heilongjiang, Chinese Academy of Fishery Sciences, has made new progress in the study of "salinity and alkalinity affecting the quality of Chinese river crab"

 

Chinese river crab is one of the important farmed aquatic economic animals in China, and the vast majority of Chinese river crabs grow and fatten
in freshwater environments.
The team's previous research found that the quality of Chinese river crabs grown and fattened in outdoor saline environment was better than that in freshwater environment
.
There are many factors affecting the quality of Chinese river crabs outdoors, and whether salinity and alkalinity have a significant impact on the quality of Chinese river crabs needs further study
.
In this study, Chinese river crabs were cultured and fattened under saline and alkaline water conditions in the laboratory, and various nutrients were tested, and the results showed that salinity and alkalinity were conducive to increasing the content of carotenoids in the head of Chinese river crabs, docosahexaenoic acid (commonly known as brain gold) DHA of edible tissues (liver pancreas and muscle), ePA of eicosapentaenoic acid (commonly known as deep sea fish oil), total essential free amino acids∑ EFAA, total free amino acids∑ FAA and total umami amino acids∑ TUV substance content increased, It shows that the Chinese river crab fattened in saline water is of better
quality.

 

This study verifies the hypothesis that the quality of Chinese river crab is affected by the salinity of water body, which lays the basic data for further exploration of how salinity and alkalinity regulate the quality of Chinese river crab, and also provides ideas
for the next step of high-quality Chinese river crab breeding.