1. Morphological characteristics: Flounder variegata belongs to the genus Flounder, which belongs to the family Flounder, and its morphological characteristics are very similar to those of Flounder and Flounder. The body is flat, asymmetrical left and right, with eyes on the right side of the head, medium mouth and no spines on each fin. Both dorsal fin and gluteal fin are long, and there is pigment on the side with eyes. There is no swim in an adult fish.
2. Feeding habits: The flatfish is omnivorous and benthic. It mainly eats shrimps, crabs, small shellfish, echinoderms, cephalopods and small fish, etc. It is reported that small miscellaneous fish and compound feed can be fed under artificial breeding conditions.
3. Growth characteristics: The growth speed of flounder is faster, but slower than that of flounder. After hatching 18 months, the total length of the artificial seedlings can reach 34 cm and the weight can reach 800 g. The flatfish is similar to other flatfishes, and it has the characteristics that females grow faster than males.
4. Living habits: Platycladus variegatus is a benthic fish, with its eyeless side resting on the bottom, and likes to inhabit relatively hard bottom, such as rock bottom, sand bottom or gravel bottom. The spotted flounder is gentle, usually floats less, and only jumps to hunt when foraging. The flatfish is similar to other flatfishes and has strong adaptability to temperature. According to Japan's culture experience, the most suitable culture water temperature for the flounder is 13-23℃. Its salinity is not too high, and it can be cultivated in general sea areas.
5. Reproductive habits: In nature, the female spotted flounder generally likes to lay eggs at the estuary of rivers or near swamps or other diving areas near the coast. According to its natural distribution, the spawning season is also different, usually from September to March of the following year. The water temperature during spawning should be between 10.5- 12.5℃. 1 mature female fish with a body length of 25.4 cm can lay10,000,000 eggs in the spawning season. There is no special requirement for the bottom material of the water area when spawning.
6. Development prospect of aquaculture: Papilio variegata is one of the most promising cultured fish after PARALICHTHYS olivaceus and Scophthalmus maximus, and will become a new industry. The flounder has high nutritional value and unique taste. It is very popular in domestic and foreign markets, especially in Europe, and it is comparable to frog and trout in the market. In addition, it is resistant to transportation and freezing, and the meat quality remains basically unchanged after refrigeration, which is deeply loved by consumers.
Abstruse fish is a tadpole. In fact, raising tadpoles is just like raising a pot-bellied fish. The jar is not too big, and it is best not to exceed one foot (30? ）； Even as long as it is a container that won't leak! The biggest difference between raising small fish and tadpoles is that the former can be kept for a long time, but the latter usually becomes a small frog in1~ 2 months. Therefore, you don't need to spend too much "gorgeous" equipment and furnishings; Unless, you raise tadpoles of large frogs (tadpoles are over half a year), or you raise small fish and aquatic plants by the way. Otherwise, the "luxury house" that has been painstakingly decorated will be revoked at once! Therefore, raising tadpoles only needs a "bare jar" (that is, an empty basin of water); If you think this is too cruel, you just need to spread a layer of fine sand on the bottom and put some strong aquatic plants, which is very advanced. In addition, when collecting tadpoles, you can observe the original living environment of tadpoles a little. If they are caught in a still pool, they can be raised according to the above method. If tadpoles are caught in flowing waters, it means that this kind of tadpoles have a high demand for dissolved oxygen, so an air pump should be prepared for them, and the air output should be minimized to avoid excessive water flow. Prepare another basin for water change. The most important thing to pay attention to when raising tadpoles is the water quality, and there are many factors that affect the water quality, including the number of tadpoles, the type and quantity of feed, the feeding frequency, and the layout environment. The most direct way to maintain excellent water quality is to "change water frequently", but how often? Changing the water too often is also very troublesome, so just change the water every 3-5 days! When changing water, you only need to pour 2/3 of the water, and then add the aerated tap water to the original position. It is suggested to prepare another container for water aeration, and then fill it with water for the next water change after each water change. However, the worst part of the water quality is usually at the bottom, and there will be a lot of feces and inexhaustible feed. Therefore, when changing water, it is best to try to suck up the sediments at the bottom to effectively improve the water quality. Therefore, at such a frequency of changing water, the number of feeding is decided. Although tadpoles can't be eaten as much as possible, they can't be given too much at a time, which wastes food and easily pollutes water quality. Therefore, according to the number of feeding, different amounts of feed are put in; After a little observation, you can eat it almost 2-3 times a day within 10 minutes each time, or add it slowly until the tadpoles stop eating. If it is raised on the desk, you can also adopt the method of "small amount and more meals", but only if the boss does not object to raising it first. As for the number of tadpoles (it should be said that the density of tadpoles), it is best not to be too much. As a result, the feces will increase and the water quality will soon deteriorate. Secondly, living too densely can easily lead to diseases and poor health. If you keep some large tadpoles, you should keep them more sparsely and reserve room for them to grow up. Of course, you can just keep a few, so you don't have to change the water too often! General fish feed Of course, if frogs want to grow up well, they must be provided with proper nutrition, that is, they must be fed. The simplest way is to use "fish feed", which is easy to buy and convenient to feed. However, there are so many kinds of fish feed on the market, each of which has its own characteristics. Which one should we choose? There are several selection principles: "quantity". As I said before, raising tadpoles will end in about two months, and it will be wasted if you buy too many at a time. If you have fish, you can use the same feed. "characteristics", after the feed is put into the water, some will float and some will sink. Observe in advance which water layer your tadpoles like to feed on (surface layer, middle layer or bottom layer), and then buy feeds with different characteristics. "ingredients", it is not easy to judge the quality of feed directly by the label of ingredients, but you can choose a feed that is suitable for general fish, and its nutrition should be balanced. "Size", feed that is too big can't be eaten immediately, and it can't be eaten until it is soaked (otherwise it needs to be ground slightly); If the feed is too small, the feeding efficiency of tadpoles will be greatly reduced. Of course, this requires a little observation before they can choose the appropriate feed. If you suddenly run out of feed, or occasionally want to change their taste, you can choose "rotten vegetables" (boiled, not put in rotten! ), making tadpoles easy to scrape. If you feel that it is troublesome to cook vegetables every time, you can cook a little more at a time, then soften them into green vegetable balls of moderate size, freeze them, take out one at a time and put them into the water. After a while, tadpoles can eat them. In this way, tadpoles can grow up smoothly by interacting with feed! 7 Respondents: 597552996