maintenance, care, compatibility
Danio rerio: content, compatibility, reproduction, photo-video review
Order, family: Carp.
Comfortable water temperature: 20-24 ° C.
Ph: ph 6.5–7.5.
Aggressiveness: not aggressive.
Compatibility Danio rerio: compatible with all “peaceful fish”: danios, terence, minor, tetra, scalar, soma, etc.
Useful tips: Very common fish. Fishes quick and gregarious.
They can coexist with many species of fish, even with fish of medium and increased aggression: scalar, goura and even with small cichlids.
Fish Danio rerio lives in slowly flowing water bodies of Southeast Asia.
A small fish with a body length of up to 4.5 cm. The body is elongated, flattened laterally.
Along the body of the fish are alternating blue and white stripes that start from the gill covers and end on the tail fin. The tail and anal fins are striped.
The remaining fins are clear, colorless.
Fish are kept in the aquarium flock (from 6 copies). It is possible to contain Danio rerio in a general aquarium with a length of 60 cm and a volume of 20 liters The decorations of the aquarium can act – thickets and floating plants, stones, snags.
Fishes also need free space for swimming.
Comfortable parameters of water for the content of zebrafish: temperature 20-24 ° С, dh up to 15 °, ph 6.5–7.5, regular weekly water changes (1/5) will have a positive effect on the health of the fish.
Feeding Danio Aquarium Fish must be correct: balanced, diverse. This fundamental rule is the key to successful keeping of any fish, be it guppies or astronotuses.
Article “How and how much to feed aquarium fish” talks in detail about this, it outlines the basic principles of the diet and feeding regime of fish.
In this article, we note the most important thing – feeding fish should not be monotonous; both dry and live food should be included in the diet. In addition, you need to take into account the gastronomic preferences of a particular fish and, depending on this, include in its diet ration either with the highest protein content or vice versa with vegetable ingredients.
Popular and popular feed for fish, of course, are dry food. For example, hourly and everywhere can be found on the aquarium shelves of food company “Tetra” – the leader of the Russian market, in fact, the range of feeds of this company is striking.
In the “gastronomic arsenal” of Tetra are included as individual feeds for a certain type of fish: for goldfish, for cichlids, for loricarids, guppies, labyrinths, arovan, discus, etc. Also, Tetra has developed specialized foods, for example, for enhancing color, fortified or for feeding fry.
Detailed information on all Tetra feeds, you can find on the official website of the company – here.
It should be noted that when buying any dry food, you should pay attention to the date of its production and shelf life, try not to buy food by weight, and also keep the food in a closed state – this will help avoid the development of pathogenic flora in it.
Reproduction takes place without any difficulties. But the fish is this – fawning.
Therefore, without preliminary preparation is not enough.
About a week before spawning, males should be separated from females and kept separate from each other. The female from the male can be distinguished by a more rounded abdomen and a less saturated color of the yellow-green stripes.
Before spawning, producers need to be abundantly fed, preferably with a chowder.
Spawning can serve as an aquarium with a volume of 10 liters (in extreme cases – the usual three-liter jar). Cover the bottom with luster, peristolistnikom or fontinalis. I also had positive results with the usual elodea.
Plants gently press down with small pebbles so that they do not rise to the surface. You can also use a grid that has cells of such size that the eggs freely pass through them.
But its cells should be cramped for manufacturers.
Water should be fresh settled for at least 2 days. Temperature 24 – 26 degrees Celsius.
She poured a layer of about 5 centimeters above the plants.
In the evening two males (maybe three) and one female are planted in the spawning prepared in this way. The readiness of the female for breeding is indicated by a thickened abdomen near the anal fin. Capacity put on a well-lit window.
Zebrafish reproduction begins in the morning when the first rays of the sun fall on the breeding ground. The female can sweep 50 to 400 eggs at a time.
If spawning did not happen on the first morning, the producers need to be held in the spawning area for another day after feeding them with small bloodworms. If now there was no spawning.
That males need to be transplanted from females and after 3-4 days to plant again to spawn.
There is one peculiarity – if the spawned female is not planted again to spawn in 7-10 days, then it can lose the ability to reproduce.
After the end of spawning, manufacturers should be precipitated, and half of the water should be replaced with fresh settled, of the same composition, of the same temperature.
After about 3-4 days from the eggs the larvae appear, which for several days hang on the glass jars. They have the appearance of strings with thickened heads. After a few days, the fry begin to swim.
As soon as the fry swim they need to be given ciliates, rotifers, nauplii Artemia. If the feed is very tense, you can feed up boiled egg yolk boiled in steep water.
You only need to give it very carefully in small portions, as it spoils the aquatic environment very much. The results will be somewhat worse.
As the fry grows, food for them can and should be enlarged. For the older fry, small crustaceans can be given – daphnia, cyclops.
Grown fry as they grow must be transferred to a more spacious vessel.
Glofish – These are genetically modified fluorescent fish.
The first fish that have been mutated is Danio rerio. As a result of experiments received fish with red, green and orange fluorescent color, which becomes brighter and more intense with ultraviolet light. Transgenic fish are as unpretentious in content and peaceful as the “natural” individuals.
Despite the spread of opinion about the sterility or sterilization of genetically modified fish for the purpose of not spreading them in natural waters, you can get quite healthy and viable offspring from GloFish. Commission on the restriction of the use of genetic technologies breeding, exchange and sale of fluorescent fish GloFish is strictly prohibited.
How did it happen: fragments of jellyfish and red coral DNA are embedded in their DNA. Danio with a jellyfish DNA fragment is green, with coral DNA is red, and the fish in which both DNA fragments are present are yellow.
Due to the presence of these alien DNA fish glow brightly in the ultraviolet light.
Photo compilation with danio rerio
Interesting video about danio rerio