Fish Of The Volga
Diversity of fauna, in particular fish, the Volga is considered one of richest rivers. In its pool there are 76 species of fish and 47 subspecies. The Volga River The…

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Eat fish! Diet
Experts came up with the name "anadromous" fish for sturgeon, sterlet, stellate sturgeon, Beluga and salmon, on the basis that the they they live in the ocean but spawn in…

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ocean

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Sharks: The story of a bookplate

Ten years ago, on the island of Sipadan in Malaysia, I took a picture of my first shark. It was almost certainly a shark-Zebra, Stegostoma fasciatum. The current was carrying us along sheer walls, and she, mysterious and beautiful, gleamed in the distance. My heart jumped to somewhere in the Adam’s Apple, I quickly raised the camera and took this blurry picture.

Shark-Zebra

The shark disappeared into the depths, and I got a new hobby — a passion for cartilaginous fish. Have devoted a considerably long time, wrote some articles , even led a couple of sections in Wikipedia. Traveled to different corners of the planet to dive with them.

Of all the sharks I liked Fox, or as she is known in English, thresher. She is like a shark-Zebra with long tail and harmless disposition. Graceful, smooth and swift. Without the aura of celebrity, without the reputation of a ruthless killer. So to speak, a humble toiler of the ocean depths.

Thresher shark (Alopias vulpinus, Thresher shark). Illustration from the book “A field guid to the sharks of the world” Continue reading

Why are sharks afraid of dolphins?

Shark is considered the most terrible in their bloodlust marine predator. But it is justice. Such an enemy sharks are dolphins. Why was the shark afraid Dolphin, although their size sometimes exceeds them?

There is a theory that because the shark flees at the sight of a Dolphin that is trying to save his life. Dolphins live in packs, and many testimony and research have their own mind, yet incomprehensible to the people. If they don’t bother people, but on the contrary always help them, it does not mean that soft dolphins are harmless creatures. They are perfectly able, to defend and attack. Dolphins at high speed, beat the shark with its nose in its belly or in the gills . this is the most vulnerable place of the predator. But great speed and a powerful blow to the nose of the Dolphin can be deadly for sharks. At the sight of aggressive sharks attack dolphins and beat it until it is destroyed. If the shark in time will be able to escape, you will not lose a life. This war sharks with dolphins is observed quite often, and the shark is not attempt attacks on people, no matter how hungry, if there are dolphins. Tell you that there have been instances when dolphins to death zabolevanii-nosed porpoises. And it’s not in hunger, dolphins are not by nature bloodthirsty. Continue reading

10 facts about the Black sea

In honor of the coming of the pores of the holidays we offer to your attention a selection of interesting facts about the Black sea.

The first mention of the Black sea are found in documents relating to the V century BC. It is on the Black sea, Jason and the Argonauts went to Colchis for the Golden fleece.

1. The ancient Greek name of the sea — Pont Aksinsky (gr. Ἄξενος Πόντος), meaning “Inhospitable sea”. It is assumed that the sea was named so because of difficulties with navigation. Later, after a successful exploration of the coast by Greek colonists, the sea became known as the Pontus Euxinus (gr. Εὔξενος Πόντος, “Hospitable sea”). Romanian Black sea Marea Neagră is called.

2. A characteristic feature of the Black sea is complete (except some bacteria) absence of life at depths greater than 150-200 m. the fact that the deep layers of the Black sea is saturated with hydrogen sulphide.

Nikolay Knipovich

3. In the scheme of currents of the Black sea there are two huge closed cycle with a wavelength of 350-400 km In honor of oceanographer Nikolai Knipovich, who first described this scheme, it was called the “Glasses of the Knipovich” Continue reading

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Dangerous animals of the Black sea
Dangerous animals of the Black sea. Medusa Aurelia. Medusa kornerot. Stingray. Black sea Scorpion. Weeverfish. The Scorpion visible. "Training project in geography" - the rating of the project. The performance…

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Dangerous animals of the Black sea
Dangerous animals of the Black sea. Medusa Aurelia. Medusa kornerot. Stingray. Black sea Scorpion. Weeverfish. The Scorpion visible. "Training project in geography" - the rating of the project. The performance…

Continue reading →