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TROPICAL FISH AS A MIRROR OF GLOBAL WARMING

In the far Eastern marine reserve, founded by the Institute of marine biology Feb RAS in 1978 in Peter the Great Bay, met on several occasions fish-aliens from the tropics, but especially frequent were such meetings in recent years.

In August 2001, in the Bay West of the island of furugelma members of the research group during diving excursions met on a sandy shoal flock of small, very mobile fish. After a few days of feeding fish are used to treat and allowed himself to be photographed. It was North of the dog-fish (fugu) Blowfish from the family. They live in the coastal zone; reach a length of 50 cm Due to the special musculature of the pectoral fins of a puffer fish can move not only forward but also backward. Jaw teeth Fugue fused with each other and form in each jaw a pair of inserts separated from the front, it allows them to eat well attached to the substrate organisms-obratitesj. In case of danger fish filled with water or air saccular outgrowths of the stomach and swell, taking a spherical shape. Puffer fish are often toxic in their bodies contain dangerous poison – tetrodoxin. However, purified from the skin and peritoneum and properly cooked meat of these fish is used for food in many countries of South-East Asia, where the dish “fugu” is a delicacy.

Letom here have been found in shallow water Chinese yellowtail, amberjack or big. Seriola are large predators, reaching lengths of over 1 m; live on the continental shelf and form a small but dense aggregations in the water column. Seriali hunt groups for small fish (anchovy, sardine, mackerel), moving quickly from one area to another. In South-East Asia, the juveniles of the amberjack specially podesheveyut networks in obstructed areas of the sea, because the taste of the meat of these fish are highly valued. In the waters of the Gulf of Peter the Great met earlier yellowtail two other species, Golden and yellowtail. Continue reading

The pond in the country – a favorite vacation spot!

The choice of location for a garden pond

Before proceeding directly to the construction of a garden pond, it is necessary to think over carefully. With a rope it should be noted the border of the future reservoir and see whether it will be a harmonious look from different points of the garden. If the pond is assumed with the lights, then the cable should be laid in advance.

For the pond, choose a Sunny place, well, if it will be protected from the cold wind. Try to pick a place away from trees, or deciduous, their leaves will decompose and form gases and substances harmful to fish and promote algae growth. Especially harmful is the foliage of willow, Holly, horse chestnut and bobovnik. Ponds free-shape form is better positioned at the lowest area of the garden.

The choice of the form of a garden pond

Depending on site conditions there are two style design of the pond. Formal pond assumes the right shape geometric shapes – oval, square. It is regardless of the other elements of the garden. In this style are not permitted coastal plants. And in the reservoir it is necessary to have plants with leaves floating on the surface, and plants – oxygenators. Continue reading

Dangerous for human

I will begin with the sharks.

the sand shark reaching a length of 4.3 m, from the squad lunoobraznye. Common in tropical coastal waters of all continents, this shark everywhere behaves quite peacefully and only sand sharks Africa has a bad reputation of man-eaters.

Silver shark (Carcharhinus albimarginatus). Reaches 3M in length with a weight of 160kg. Potentially dangerous: one unprovoked attack on a swimmer.

Blacktip shark (Carcharhinus few). Length 2.5 m, weighs 120kg. Attacks on humans do happen, but none of them serious injuries not ended.

Oceanic, the oceanic whitetip shark (Carcharhinus longimanus) . Around 3.5-4m in length with a weight of 170 kg. Most of the victims of the shipwreck in the open ocean on her conscience.

Korotkoplodnyh Mako shark (Isurus oxyrhinchus) . This is the fastest of all the sharks. Reach a length of 3.2-3.8 m with a maximum weight kg. Considered one of the most dangerous to humans.

Giant hammerhead shark (Sphyrna mokarran) . Is 6.1 m and weigh 450 kg. Several dozen cases of attacks on people,including lethal.

Whale shark (Rhincodon typus) . Up to 18m in length and a weight of 15t or more. Feeds on plankton and is completely harmless. Continue reading

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