Silver crucian carp (Carassius auratus gibelio) is a closely related subspecies of crucian carp. Commonly known as: crucian carp melon seeds (Northeast), red crucian carp (Xinjiang Altay). English name: Silver prussian carp.
The body shape and color of silver crucian carp are very similar to that of ordinary crucian carp, but its body is significantly taller and wider than ordinary crucian carp, with its body length being 1.9-2.4 times its height; its body color is darker; its growth rate is faster than that of crucian carp, and its individual size is also larger. The largest individual can reach 3 kg.
The living habits of silver crucian carp are similar to those of crucian carp. It likes to live in shallow water, overgrown with aquatic plants, and places with muddy bottom. Overwinter in deep water. It is an omnivorous fish. The spawning period is generally from the end of May to the beginning of July. The age of first sexual maturity is mostly 3 years old, and a few are 2 years old.
Silver crucian carp is widely distributed in the temperate waters of Europe and Asia. my country is rich in the Heilongjiang-Liaohe River Basin in Northeast China and the Irtysh River Basin in Xinjiang.
Usually in the natural environment, the sex ratio of a fish is about 1:1. The ratio of ordinary crucian carp is 4:1, while that of silver crucian carp is 9:1. The reproduction method of silver crucian carp is also unique. They do not require a male mate, so how do their eggs fertilize and develop after they are laid? First, let’s explore it from a genetic perspective. Most fish have dozens to 100 dominant genetic chromosomes in each somatic cell, and are called diploid fish. The number of chromosomes in the eggs and sperm produced by these fish is reduced by half. This kind of sperm has , egg cells are called haploid. During fertilization, after the sperm enters the egg, a diploid fertilized egg containing 100 chromosomes is formed. The fertilized egg divides and develops, and its offspring are both male and female.
The somatic cells of silver crucian carp contain 162 chromosomes and are called triploid fish. The number of chromosomes in the eggs they produce remains unchanged at 162. The fertilization process of eggs during the reproduction of silver crucian carp is very special, which is different from the general fusion of the two sexes. The eggs produced by silver crucian carp are not stimulated by sperm produced by male fish of other species, but these sperm do not participate in the actual fertilization process and thus develop into female offspring. This special process of fertilization and development is called gynogenesis. Therefore, the offspring of silver crucian carp are exactly the same as their mother from external characteristics to internal structure, forming a unique "daughter country" of fish.
Scientists took advantage of the unique genetic characteristics of silver crucian carp and selected the sperm of Xingyuan red carp to inactivate the eggs of silver crucian carp. Their offspring are still all females, which not only maintains the mother's excellent genetic characteristics, but also exhibits " The advantageous traits of the "parent strip" are that the offspring will not separate, degenerate, and grow quickly. Its growth rate is 2-3 times that of ordinary crucian carp, and it has the advantages of wide feeding habits, easy raising, easy reproduction, strong vitality, few diseases, good meat taste, rich nutrition and high economic value. This kind of silver crucian carp is named Xieyu Silver crucian carp.
animal tags：
you may also like
Pseudobrama simoni belongs to the order Cypriniformes, family Cyprinidae, subfamily Pseudobrama simoni, and genus Pseudobrama simoni. Commonly known as: Niyu, thorny bream, flat neck, bream and Diao. The sides of the body are flat, the back is high, the abdomen is round,...
The giant spiny loach (Mastacembelus armatus) belongs to the order Perciformes, the suborder Spiny Loach, the family Spiny Loach, and the genus Spiny Loach. Commonly known as: naconi, stone cone, burlap, pepper fish, saury fish. English name: Large spiny eel. The body is...
Macrura reevesi belongs to the order Herringae, family Herringidae, subfamily Macrura, and genus Macrura. Common names: Shiyu, Sanlai fish, Sanli fish. English name: Hilsa herring, Seasonal shad, Reeves’shad. Endangerment level: Endangered. The body...
Carp farming is a common freshwater fish farming activity. The following is a detailed introduction to the methods and techniques of carp farming: 1. Site selection and facility preparation Pond selection: Choose a breeding water body of appropria...
Climbing perch is commonly known as mountain crucian carp and flying crucian carp. The body shape is slightly similar to tilapia, but smaller, only 100 mm long. Climbing bass inhabits still, slow-flowing, silt-rich water bodies. When the water body dries up or the environ...
Long-body mandarin fish (Coreosiniperca roulei) is called long-body mandarin fish. It belongs to the order Perciformes, the family Sniperidae, and the genus Long-bodied Mandarin fish. Commonly known as: bamboo tube mandarin fish, colorful mandarin fish, and colorful gui. English name: Slender...
Liza haematocheila belongs to the order Mililiformes, the family Mililiidae, and the genus Haematocheila. Commonly known as: tide mullet, red-eyed mullet. English name: Soiuy, Redeye mullet. The body is like a mullet, cylindrical, with a flat front end and a flat tail sid...
Hucho taimen, also known as Hucho taimen, belongs to the order Salmoniformes, family Salmonidae, subfamily Salmonidae, and genus Hucho taimen. Commonly known as: Zheluo fish, Zheluo fish, Zheluo fish (Northeast), big red fish (Xinjiang). English name: Taimen, Huchen. Enda...
Email: jsset#163.com (change # to @) Please indicate your purpose of visit! Guangdong ICP No. 2022053326 XML| map| Chinese
