How to Improve the Body Color of Adult Eels? A Detailed Guide to Practical Methods

Eel body color plays a decisive role in @#@136@#@. Raising eels with good body color is the eager hope of all farmers and a topic that many feed manufacturers have been exploring. To solve the problem of eel body color, you must first understand the causes of eel body color and the factors that affect it.

The production of eel body color

Eel body color is mainly the result of the combined action of various factors such as carotenoids, melanin, pterins and guanine.

Factors affecting eel body color

1. Substances such as oils, antioxidants and vitamins in the feed can protect pigments from destruction and are all beneficial to fish absorption of carotenoids, while feed containing a relatively high concentration of calcium will reduce the absorption of carotenoids and affect their deposition effect.

2. The physical properties, particle size, stability and type of carotenoids are all related to their deposition on the fish body surface and in the muscle.

3. The water temperature, dissolved oxygen and plankton in the farming environment, as well as the duration of feeding during the farming process, will also affect the pigment deposition rate.

4. The health status of the fish will affect the feed intake rate and digestibility of the fish during the farming process, thereby affecting its absorption and utilization of carotenoids, affecting their deposition amount on the body surface and in the muscle, and affecting the color of the fish body and flesh.

5. Oxidation and lipidation of the feed may both reduce pigment deposition in the fish body.

6. Vitamin deficiency leads to body color darkening, so an appropriate amount of vitamins should be added.

Countermeasures

Use high-quality fish oil, such as refined whole @#@239@#@ oil. Long-term use can make eels closer to sky blue. Some seaweed and spirulina products are often added to the feed, and these products are beneficial to improving eel body color. The vitamins in the feed must be complete to facilitate the deposition of eel body color and avoid darkening or the appearance of a bronze color. For minerals, chelated mineral concentrate products should be the first choice; a major factor causing eels to appear bronze-colored is imbalance of minerals. The digestion and absorption rate of the feed must be high, otherwise it is difficult for eel body color to deposit normally. Some digestion-aiding substances can be added to the feed, such as "Surer Jing".