Viviparous fish are among the most popular aquarium fish species. Earned its popularity because of the ease of breeding in aquariums, even without any special conditions. Main popular representatives of the species: guppies, swordtails, and platys mollienesia. Due to the ease of breeding, viviparous fish have been widely disseminated among breeders. They are called viviparous, because they don’t spawn and immediately throw the fry, they develop the female in the abdomen after fertilization by the male of the female. Other viviparous fish kept in aquariums more often. They are less popular because of the modest color or bad habits — excessive aggressiveness or jednosti.
Sex differences viviparous:
Anal fin of females have fan-shaped. Anal fin of the male has the appearance of a twig (gonopodium) and can rotate in all directions.
Mosquitofish. A male and female.
Conditions viviparous fish:
Almost all types of viviparous fish will be suitable tank volume 100 litres, planted with aquatic plants. Some viviparus, for example mollienesia, doing a good job with small growths of algae on the plants, thereby helping us in cleaning and maintaining an aquarium. But there are those types of viviparous fish that don’t mind to eat some plants, especially tender leaves. For example mosquitofish severely damages the plants. Volume of the aquarium to dolzhenstvovavshih General rule 1 cm length of fish (without caudal fin) in 1 liter of water. Thus, for a pair of guppies enough tank to 10 liters, but preferably more of course, because we don’t want to torture the fish in the aquarium close:) the water Temperature is from 23 to 30 degrees Celsius, although many guppies live in unheated aquaria at a temperature of about 18 degrees Celsius. Water hardness is not demanding. Some podsalivaya water for zimorodok, I do not advise, as they thrive in fresh water and to salt water in the event of an outbreak of disease in fish, although it is better to use special preparations in each case of the disease. It is recommended that as a General rule, weekly water change 20% of the total volume of aquarium water. Mostly viviparous fish are peaceful fish and can be kept with other predatory fish, although I had swordtails, the male was constantly bullying each other, so I had to leave one and the others to distribute.
Feeding viviparous fish:
To feed viviparous fish are not demanding. In nature they feed mainly on live food (mosquito larvae for example), so in aquarium conditions it is recommended to feed the fish live foods such as bloodworms, Daphnia, Tubifex etc. Definitely worth podkalivat of zimorodok and vegetable foods, such as dried nettle and/or spirulina. Spirulina is sold in usual drugstore for people, but this spirulina is pretty much muddies the water and not very willingly eaten by fish. Sold special fish food containing spirulina. I loved pills firm Sera. They are easily mounted on the wall of the aquarium and is eagerly eaten by fish. Also, you can feed dry food in flakes and chips. The firm Tetra has specialized food-flakes for guppies. The fry of live-bearing fish are well “up” and melkoistolchennym with dry feed. There is, again, a specialised dry food for fry. But the best food for fry are viviparous nauplii brine shrimp are small crustaceans that are well eaten by fish. You can feed frozen brine shrimp, but to svezhevypechennye the crustaceans, the fry is much more interesting spongicola, it looks like they are ready endlessly till it bursts:). Malkov from two weeks you can also start feeding with spirulina.
Reproduction viviparous fish:
Breed, as I said, is quite simple. Enough to put in the aquarium breeding male and female and within a month or two you will see the fry in the aquarium. To save all the fry it is necessary that the aquarium was gestossen plants, and on the surface floated riccia. Viviparous fish are not spawning. Females are fertilized by the sperm of males and the fry develop in the abdomen in females to the throwing(of birth) fry. The fry are born and already after 10-15 minutes begin to swim in the water column, usually rise to the surface, so it is important that at the surface were floating plants (moss, floating hornwort, myriophyllum, etc.). After the female fry are swept aside, they are preferably deposited into a separate aquarium with the same water parameters as in the main tank. A month later they can be back in the main tank. Females of zimorodok males sperm can be stored for about six months, thus only one cross with a male for the following 3-4 marks fry.