development

Black sea.

Flora and fauna

Over the past Millennium has developed this unique shape of the Black sea. This is the most fresh sea, with the lowest content of salt in sea water, the gentle sea-to-person around the globe!

The black sea is the most Northern subtropics in the world, awesome beauty of the southern nature. It walks under the shade of palm and eucalyptus trees. It’s the heady aroma of blooming magnolias and meadow grasses. The Mediterranean sea brought the most modern inhabitants of the Black sea. The few remaining survivors of the disaster relict freshwater species, including the famous Azov-black sea sturgeon, took refuge in the river deltas of the black sea region.

The flora of the Black sea

The flora of the Black sea includes 270 species of multicellular green, brown, red benthic algae (Cystoseira, Phyllophora, zoster, kladofora, Ulva, enteromorpha, etc.).

In the composition of phytoplankton in the Black sea — not less than six hundred species. Among them, dinoflagellates — loricate flagellates (prorocentrum micans, ceratium furca, small scripsiella Scrippsiella trochoidea, etc.), dinoflagellates (dinophysis, protoperidinium, alexandrium), various diatoms, etc.

The fauna of the Black sea

The fauna of the Black sea is markedly poorer than the Mediterranean sea. In the Black sea is home to 2.5 million species of animals (including 500 videodnevnik, 160 species of vertebrates — fish, mammals, 500 species of crustaceans, 200 species of mollusks, and the rest — invertebrates of different species), for comparison, in the Mediterranean — about 9 thousand species. Continue reading

The importance of fish in human nutrition

There are some foods that are simultaneously rich in iron, phosphorus, zinc, magnesium, calcium, selenium, vitamins A, E, D, and amino acids that are necessary for the normal functioning of the cardiovascular system, thyroid gland and stomach. But in fish, all these elements abound. Therefore it is very importance of fish in human nutrition. In addition, this product small fat content (30%), it is perfectly assimilated by the human stomach digests the protein contained in fish, only 1.5-2 hours compared to 5 hours it takes to digest, say, beef.

The importance of fish in nutrition

People suffering from excess weight, just perfect river fish, which contains 2.5 grams of fat per 100 grams of weight. But suffering from diabetes can have it without any restrictions, because the number of carbohydrates it is small – only 0.1%.

Fish, competing in this regard with the chicken, is an excellent source of high quality protein which contains all necessary for normal functioning of amino acids. It also differs from meat protein by the presence of methionine.

Due to the fact that the collagen that makes up connective tissue, has the property of rapid transition in a soluble form, fish is easy to cook, and its tissues become loose, blagodaram provides maximum and rapid absorption of all nutrients. The most rich in protein fish include salmon, trout, and salmon, Beluga, easier to say that all representatives of groups of sturgeon and salmon. Great importance in human nutrition fish is also underpinned by a very high nutritional value due to high concentration of fatty acids. It refers to oily marine fish – salmon, mackerel, herring, trout, salmon and other things. Continue reading

What kind of water suitable for the aquarium?

In aquarium practice is usually to use tap or well water, which in its properties is very diverse. Water is oxide of hydrogen (H2O) and consists of two parts hydrogen and one part oxygen. In the water many dissolved substances (oxygen 21%, nitrogen 76%, carbon dioxide of 0.3%). Water in contact with soil, plants, fish, the products of decay and alkaline earth elements, acquires new qualities. The water in the aquarium must be free of any impurity metals must not contain large amounts of salts of magnesium, calcium and any other components that are harmful to aquarium inhabitants.

In rural areas often use wells, river and lake water. Before pouring water in an aquarium must be heated to a temperature of 70 C, thereby partially release water from undesirable microorganisms.

Water, potable, and suitable for the aquarium, of course, if it’s not mineral water. At home to fill in the most suitable aquarium tap water, which in most geographical areas of our country is of medium stiffness with seasonal fluctuations within 8 – 12 ‘. Excessive chlorine in it, you can delete, defending water in non-metallic container for 1 – 2 days (complete disappearance of released bubbles), active aeration (10 -12 hours),filtration through activated carbon, adding to it the hyposulphite (thiosulphate) sodium (1 g/10 l) or by boiling for 10 minutes. The last method, the water loses oxygen and must be aerated.

The use of pond water is not recommended, and the water is rain and snow the city is not suitable for the aquarium, as it contains large amounts of harmful solid, liquid and gaseous state. In rural areas, the use of such water is possible, but it needs to be filtered from dust and other substances. Continue reading

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