The Heilongjiang Institute of Chinese Academy of Fishery Sciences has made new progress in the study of the influence of new protein sources on grass carp growth and muscle quality

The "Research on the Effects of New Protein Sources on Grass Carp Growth and Muscle Quality" carried out by Wang Liansheng, Fan Ze and others of the Fish Nutrition and Feed Research Office of Heilongjiang Institute has made new progress, and the relevant research results have been "e" valuation of four novel protein sources as alternatives to soybean meal for two specifications of cage-farmed grass carp （Ctenopharyngodon idellus） deeds: Effect on growth performance, flesh quality, and expressions of muscle-related genes" published in the JCR 1 district magazine Frontiers in Marine Science (IF=5.
247) (https://doi.
org/10.
3389/fmars.
2022.
935651
).

 

In the face of the shortage of animal and plant feed protein sources and the dual pressure of environmental pollution of farmed water bodies, the research and development of feed with low fishmeal and low soybean meal protein sources is imminent, and saving the amount of high-value protein used has become an important direction of
feed research.
In this study, four new protein sources, including chlorella, cottonseed protein concentrate, Clostridium ethanol protein, and mealworm meal, were used to completely replace the soybean meal in grass carp feed, and the growth and muscle quality
of grass carp fed by different protein sources were analyzed 。 The results show that the complete replacement of soybean meal by chlorella can not only improve the growth performance and feed utilization rate of grass carp, but also increase the content of flavor substances such as umami amino acids and glycine, improve muscle quality by improving texture parameters such as hardness, tenderness, elasticity and chewability, and promote muscle growth by enhancing the expression of genes related to growth and development such as MYF5, MRF4 and IGF1.
Cottonseed protein concentrate instead of soybean meal has similar results
to chlorella substitution.
However, Clostridium ethanol protein and mealworm powder completely replace soybean meal to inhibit grass carp growth and muscle development to varying degrees, and reduce muscle quality
.
This research result provides a theoretical basis
for the development of a new protein source for grass carp feed.

 

The research has been funded
by the National Key R&D Program (2019YFD0900200), the National Modern Agricultural Industry Technology System, and the Basic Scientific Research Business Expenses of the Chinese Academy of Fishery Sciences (2022XT0402).