Detailed Explanation of Key Points on Artificial Breeding Technology for Marble Goby
Marble goby is a carnivorous fish with rich nutritional elements and relatively high nutritional value, and it has a fairly wide farming area in regions such as Guangdong and Guangxi in China. In recent years, it has often appeared on people's dining tables and is welcomed by many people. When farming marble goby, the most important thing is to do a good job in breeding. So today, the editor has brought you the artificial breeding technology for marble goby. Let's take a look below!
1. Selection of broodstock
The selection of broodstock is very important for the breeding of marble goby. The broodstock must be sufficiently mature, around two years old. Then the ratio should be controlled at about 1:1. We can feel whether it is mature by touching it. Mature female fish are relatively light in color, have a certain amount of mucus, and are not very smooth, and their ovaries can be felt in the abdomen. Male fish are the opposite, with darker color and obvious stripes, and more mucus than female fish, feeling relatively smooth. Therefore, we can determine the maturity state of broodstock through these aspects and make selections.
2. Induced spawning
After selecting the broodstock, the work of inducing spawning should be done well. The spawning-inducing agents are mainly drugs such as chorionic gonadotropin, and the dosage should be controlled well. After injection, control the ratio well, place them in the spawning and burrowing area, and build nests. The width of the nest should be kept at about 30cm, and the height should be kept at about 20cm. Then the water level in the spawning pond should be controlled at about 40cm, and the water quality must be sufficiently clean, preferably with disinfection work done well. Broodstock injected with spawning-inducing agents will mate on their own in the spawning pond, and will spawn after about 1-2 days.
3. Incubation management
After spawning, place the fish eggs in a clean water pond for incubation, and control the density well according to conditions, seedling methods, and various other actual situations. When the water temperature is about 30 degrees, the incubation time is about 100h, and the hatching rate can reach 80%. The newly hatched larvae are about 2.5mm long, and grow about 1mm longer after the second day. At this time, the digestive tract of the larvae begins to develop, and various organs such as the intestine and anus appear. It takes about 28 days to cultivate the fry to about 1cm, but the survival rate during this period is relatively low. When they grow to about two centimeters, put them into cement ponds for cultivation and do a good job of shading.
4. Fry rearing
The survival rate of fry has a very large relationship with feed. About 3 days after hatching, the fry begin to eat. Because the mouth opening of the larvae is very small at this time, the bait is mainly raw eggs. First stir the raw eggs, then mix them evenly with hot water, filter and feed. At the first feeding, feed about four times, and then starting from the second day, alternately feed eggs and plankton, reducing the number of feedings by one. Continue until half a month. During fry rearing, we also need to do a good job in water quality regulation, do a good job in sewage discharge and water replacement, and improve the survival rate of the fry.
The above is a brief introduction to the artificial breeding technology of marble goby. The artificial breeding of marble goby is rather troublesome and requires a certain amount of technical support, so everyone must pay much attention to it. That is all for today's introduction. This article is for reference only. Thank you for reading and supporting.