processes

Black sea – description.

In the late 17th century Peter the great, meaning “to be firmly on the Azov and Black seas”, has a boatload of “Fortress” to explore the shores of the Black sea. Sailors measured the depth and made sketches of the coastline. Thus was made the first Russian map of the Black sea. Although, according to historians, the geography of the Black sea was well known to the ancient Greeks. They laid here the trade routes and built beautiful cities.

The black sea is an inland sea, belonging to the basin of the Atlantic ocean. With the ocean this body of water through the channels sequentially connects the Marmara, Aegean and Mediterranean seas. Over the Atlantic, and originate those cyclones, which bring the black bad weather. Through the narrow Straits hindered the water exchange between the seas and so the tides on the black sea coast is virtually invisible. Only occur under the action of strong winds and wind-effected processes can raise or lower the water level 30 cm On the North-East of the shallow Kerch Strait links the Black sea with the sea of Azov.

The radiant variety of its shades from blue to emerald-blue sea in all languages of the world is called “black”. The sea on the map resemble an oval, stretching from West to East on the 1150 km and from North to South nearly 580 km Severskoe location between the extreme southern point of the Crimea and the Turkish coast, which are separated by only 228 km maximum depth of 2210 m. the sea Continue reading

The colonization of an artificial lake with decorative fish

Construction technology

Many artificial lakes to commercial use zaryblyayut different species of fish, which, being part of the water community, maintain the pond in a full-fledged state.

Depending on the size of the artificial lake, and destination of fish in the pond (decorative feature for catching fish, etc.), the ratio of species group of fish at check-in may be different.

In General, all species of fish that inhabits the artificial lake, can be divided into 3 main groups:

1. Carp, crucian carp, silver carp, pike – can be up to 80% of the total number of fish in the pond. These fish are the main inhabitants of the large artificial lakes, particularly lakes open type, and is mostly meant for ponds in which the accent link is fishing.

2. Additional exotic fish to catch. The stocking of ponds can be more interesting and unusual fish species: white grass carp, whitefish, sturgeon and trout . These fish are mostly “flavor” that attracts fishermen. Some of them require every year to re-buy and run into the pond. Spend the winter in our latitudes, most of them can’t. Continue reading

Fish species bred in ponds

Carp is a domesticated form of carp, bred by a long selection work. From wild carp the carp is a more efficient use of feed, and in this regard, and grow in similar conditions carp diet. On other biological characteristics of carp and carp are very similar.

It is best to feed and grow carp at a temperature of 25-29°. When the temperature of the water feeding intensity of carp intensified, but the costs of the feed decreases due to the fact that the content of oxygen dissolved in water at elevated temperatures considerably below, than at lower, and the metabolic processes it needs more. In case of insufficient concentration of oxygen dissolved in water is bad carp to digest food.

Normal oxygen content in the water for carp believe about 5 cm3 in 1 L. the Allowable concentration is considered to be 3 to 3.5 cm3 in 1 L.

Sexual maturity carp reaches 4-5 on the year, but there are cases when it begins to multiply in third and sometimes second year. Males typically Mature somewhat earlier than females. The carp spawning occurs when water temperature 16-48°. Fecundity is usually estimated in 180 thousand eggs per 1 kg of body weight of the female. Continue reading

The most dangerous creatures living in the seas and oceans.
Despite the fact that the man himself is a predator by nature, in the ocean, there are many sea creatures which pose a danger to humans The most dangerous creatures…

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The most beautiful aquarium fish
Graceful bright aquarium inhabitants attract attention because of their dimensional action in the water surface. Today we offer you to admire the most beautiful aquarium fish. Royal zentropy This fish…

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The most incredible inhabitants of the deep sea
These creepy deep sea monsters very rarely catch the eye of people, so there is nothing surprising in the fact that we come in horror, once they accidentally leave their…

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