Predatory fish protects the fish from a mass death
In Lithuanian lakes and rivers in recent times massively dying fish, so look for an answer to the question, what is the reason? Panevezys environmentalists still waiting for the results…

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How to keep marine fish.
To care for a marine aquarium is much more difficult than freshwater. The reason for this is that in nature, fish have evolved in relatively constant conditions of environment. Therefore,…

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Cherry shrimp in a community tank
As has been repeated on the pages of the site cherry shrimp being very peaceful and quite aggressive. But if You are going to keep them in a community tank…

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Goldfish

(Carassius s. Cyprinus auratas) – belongs to the carp family (Cyprinidae) and is considered by some researchers a variation of crucian carp (Sagai vulgaris s. carassius). Since ancient times cultivated in China and Japan in many (about 100) of varieties. The color is commonly reddish, Golden where Golden fish and the fish got the name, but in addition there are breeds of pure silver, various shades of red, blue, brown, spotted, the picture is extremely varied. Well as a variety of body shape, size and structure of the scales, head shape, eye development, and especially fins, some fins can nedorazvitie or, conversely, to achieve a huge development, several varieties of double tails (right and left half have the ordinary structure of a fish tail). One of the strangest varieties, so called. telescopes with a very bloated body, huge eyes and a huge double tail. The size of goldfish fish is about 25 – 30, even 40 we see less commonly. In China and Japan breeding goldfish fish are doing great love, keep them and the rich and the poor.

In Europe, the Golden fish, the fish were brought to Portugal, according to some, in 1611, others in 1691 (point and 1728), then she was brought to England and France. Currently it is prevalent almost everywhere and is bred in ponds and aquaria. Imported by the French to St. Mauritius, she is wild and now inhabit all the ponds, rivers and lakes. The experiments of cultivation in Europe was a complete success and proved to be very beneficial. The first ponds for goldfish, the fish were arranged in France and then spread in other European countries (Germany, Austria, etc.). Each year is displayed and sold in Europe goldfish fish in the amount of 1000000 rubles. in addition, a significant number of ponds for goldfish fish exists in North America, where they sell for $ 300,000 per year.

It is known that goldfish goldfish can live 30 years – 35, according to the Chinese up to 100, spawns several (3 to 4) times a year, the number of eggs about 200. Young fish emerge from eggs in 2 to 6 days, and reach sexual maturity in 1 year. For breeding goldfish fish dig small ponds; food can serve as seaweed, bread, wafers, insects, and best of all the meat, insect larvae and crushed ant pupae. The main written about gold fish fish: De Sauvigny, “Histoire naturelle des Dorades de la Chine” (Par. 1870); H. Mulert, “The Goldfish and its culture”; Ch. Wagner, “Die Goldfischteiche”. In Russian N. F. Zolotnitsky, “Z. fish and its variation”

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Construction and repair of ponds
The depth of the pond determines the slope of the underwater Bank. Is the slope less than 30° . but quite often it is necessary to construct more ponds with…

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