The larvae mainly feed on algae such as diatoms, various rotifers, cladocera, copepods, chironomid larvae, organic debris and various artificial feeds.
In the adult stage, we mainly eat artificial feed, such as bean cake, peanut cake, vegetable cake, barley, wheat, corn flour, bran and granular feed, as well as organic debris, and also eat various algae (such as diatoms), rotifers, cladocera, copepods, chironomid larvae, fly maggots, eel feces and so on.
Carassius auratus gibelio is a new species of omnivorous culture, which has a wide range of feeding habits, has no specific selectivity for food, and basically eats everything.
In artificial breeding, as long as the feed is palatable, they all like to eat it, and they can eat it almost all year round.
1. How to raise allogynogenetic crucian carp
Taking the winter fingerling of allogynogenetic crucian carp in Shanghai as an example;
* * * In a salty fish pond of 0.22 hectares (about 2.8 meters deep), there are 7 kinds of economic fish, including allogynogenetic crucian carp, silver carp, bighead carp, grass carp, herring, bream and carp, with a total of 8 159 fish, including 4,250 allogynogenetic crucian carp.
After several months of breeding, * * * gave birth to 779 kilograms of allogynogenetic crucian carp, with an average weight of190g per tail, most of which was150-200g, and the largest individual was 500g.
2. The origin of allogynogenetic crucian carp.
In 1970s, the Institute of Hydrobiology of Chinese Academy of Sciences used natural gynogenetic crucian carp of Shuangfeng Reservoir in founder county, Heilongjiang Province as female parent and Xingguo red carp in Jiangxi Province as male parent for artificial insemination, resulting in the offspring of gynogenetic crucian carp, so it was called allogynogenetic crucian carp.
About 10% of Fangzheng crucian carp population is male fish.
Through experiments, Fangzheng crucian carp can be fertilized with the sperm of the same species or different species (such as carp) to produce offspring.
Therefore, all gynogenetic offspring of artificial insemination of crucian carp eggs and heterologous sperm are collectively called allogynogenetic crucian carp.