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. Continue reading
Today is the international Black sea day. A few Crimeans know that the sea in which they so love to swim, listening to the sound of waves, breathe the sea breeze, in many ways unique. We offer you a selection of interesting facts about the Black sea.
1 – Mountains around the Black sea are constantly rising, and the sea itself increases. And if the mountains grow only a few inches per century, sea occurs on land with a speed of 20-25 cm over 100 years. Some ancient cities had already disappeared at the bottom of the sea.
2 – Among planktonic algae found in the Black sea, there is a very unusual view nochesvetka. She has the ability to Postretirement, and because of it in August, the Black sea is sometimes lit.
3 – the Only mass shark inhabiting the Black sea prickly shark Katran. He is afraid of people and rarely comes to shore. The only danger to humans represent the dorsal fins of crambe with large poisonous spikes. Continue reading
Pond fish farming is the breeding of commercial fish in specially adapted or constructed for this purpose reservoirs. Farms can be full (full system) or incomplete (napolnitelem). In full system retailing the fish grow from egg stage to marketable, and in breeding — pedigree producers for full-cycle hatcheries and commercial farms.
Not in full-cycle farms planting material is grown marketable fish. They are of two types. The widest form of fish farming is feeding the carp fish farm . Spring here are imported from hatcheries to fingerling of carp weighing up to 30 grams, put them in the fattening ponds,in the fall catch of marketable fish with an average weight of from 500 to 800 grams. To grow fish in feeding the economy easy and accessible to everyone farming.
Fish farming in ponds
Carp is a widespread inhabitant of warm-water ponds. For several hundred years, farmers brought from the wild carp are some of the cultural breeds of carp that have fast growth rate and high fecundity. Widely known scaly, mirror, naked and ramcity carp, but most are bred the first two. Continue reading