Grass carp is a fish, abalone is a mollusk and crab is a crustacean. Their nutritional characteristics are the same, but their nutritional points are different.

Grass carp belongs to freshwater fish and is widely used because of its high output value. Protein content is about 18%, and fat is about 5%. It is mainly composed of unsaturated fatty acids. The content of omega-3 unsaturated fatty acids is lower than that of marine fish, because EPA and DHA can be transformed in large quantities in marine fish and seaweed, and relatively speaking, the content in cold water fish is higher.

Summary:

First, these three kinds. Both belong to aquatic products and seafood, so it is recommended to eat them in moderation. It is beneficial to human health, especially to reduce cholesterol and prevent cardiovascular and cerebrovascular diseases.

Second, there is no need to compare the three. If we have to make a comparison, abalone and crab are more nutritious than grass carp. However, abalone and crab are expensive, and their practical value is not as extensive as grass carp.

Thirdly, grass carp is cultured in large quantities in fresh water, so the omega-3 unsaturated fatty acids of deep-sea fish are low.

In short, abalone and crabs are not as common as grass carp, and there are few opportunities to eat them on weekdays, unless the coastal areas are more than other areas. But in the absence of conditions, eating grass carp is also possible, which is much better than not eating at all.

What should I pay attention to when raising grass carp?

First, the ecological environment of fish ponds.

As the saying goes, fish farming needs water first. When choosing a fish pond, you must choose a place far away from heavy metals or other pollution sources. If the depth of the fish pond is more than 2 meters, it is also possible. The topic of water quality is estimated to be mainly a novice, and the color of jade water is not enough. So simply pay attention to several water quality indicators, such as ammonia nitrogen, nitrite, ph value (pH value) and dissolved oxygen content, which are all important indicators. If these water quality indicators are well controlled, the road to aquaculture will be much easier.

Second, frying.

Generally, old farmers are small enough to buy, and the size is moderate. They also received two vaccinations. Novices or unfamiliar people can consider buying larger fry for breeding. When we buy enough fry, we must be present, which depends on the size of fry, the degree of damage, and the condition of gills (if possible). It's better for the boss of fry to be present when the second vaccine is given. If the fry are enough to buy fry, it is best to be nearby to prevent the transportation time from being too long. During the transportation, fry should put some disinfection and sterilization drugs to prevent the virus from being brought to their own fish ponds. The simplest thing is to put salt and crude salt for disinfection and sterilization.

Third, feed feeding.

We must learn to observe when grass carp eat. A simple example is the excrement of grass carp, and sometimes yellow powder can be excluded. At this time, we should consider reducing the amount of feeding. The feed eaten by grass carp has not been fully digested, which may be accompanied by mild gastroenteritis. Sometimes you can see that white bars are excluded. When you see this situation, it is the time when grass carp gastroenteritis is more serious. When you see the white stripes discharged by grass carp, you must treat them in time. First, reduce the amount of feed, and then add drugs such as electrolytic vitamins and enrofloxacin to the feed to treat fish gastroenteritis.

Fourth, medication.

In the process of breeding, drugs are essential, and the dosage of disinfectants, fungicides, pesticides, traditional Chinese medicine conditioning, etc. Is the key. Pay special attention to this period before and after Tomb-Sweeping Day and before and after the Millennium. At this time, pests multiply in large numbers, and the weather changes will be more serious. If you take medicine at ordinary times, just sprinkle some into the feeding area, just in case. Grass carp feed can be accompanied by drugs made of electrolytic multivitamin, enrofloxacin and traditional Chinese medicine to regulate liver and gallbladder, in case of emergency, so the drugs used in intensive culture ponds must be accurate and not sloppy.