production

The underwater ocean world of giant predatory fish.

The shark with the Latin name is Galeocerdo cuvier biologists determined in 1822, and from that time she was nicknamed the tiger shark. These sharks got their name due to the dark stripes and spots that cover the body of the “minors” of this species. Also in this title to show all the cruelty that is inherent in the shark, which is the second most deadly shark after the great white.

It should be noted that the tiger shark is a part of the family Carcharhinidae Requiem sharks. Despite its reputation, this predator also got another nickname: “sea scavenger” or “scavenger of the sea”.

It turns out that the tiger shark can eat anything from sea turtles and seals, which constitute the bulk of its diet, to more exotic kinds of “food” – rubber tires, beer bottles, nails, a driver’s license, clothes, explosives, crocodile heads, cats, pigs, and even pens, with all their inhabitants (there were precedents). In Australia, for example, was caught tiger shark with a whole and intact head of the horse in the stomach!

Why the tiger shark is called tiger?

So who are these deadly and eternally hungry predators? To begin with, what is this species different from other sharks? Well, as we already mentioned, for shark’s distinctive “tiger” colour, which is most noticeable in young specimens. Tiger sharks have a white or yellowish belly, the rest of the body is painted in cool colors range from bluish-green to dark gray.

At birth these predators have a length of from 50 to 70 centimeters. They grow much larger. An adult tiger shark can reach 4 meters in length and weighing around 680 pounds. Some individuals can grow up to 5 meters and weight gain up to 900 pounds. Continue reading

The device of the ponds for maintenance and cultivation

For the keeping, breeding and rearing fish use of different ponds: lined, dug, used peat quarries and instream ponds, cages and basins, small reservoirs and lakes.

The operation and construction of pond intended for fish production, requires compliance with certain rules, which correspond to fish and hydraulic requirements. First, you should determine the orientation of use of the reservoir, i.e. it is designed for the cultivation of food fish or for use in the design of the site. This will depend on its size, the device of the reservoir, depth, shape, mode of operation.

A pond for the cultivation of food fish is very different from the devices of decoration. To this reservoir are a bit different requirements. It does not make sense to do complex bottom topography, indented coastline, depths off the coast, laying on a bed of special soil, decorative elements. The main attention should be paid to the layout of the bed of the pond, the supply of the reset options and a good water supply. Fish farming will benefit, assuming the decision of questions of operation of the reservoir and construction. If the device pool determines much the size of the land plot, which is released under the dispensing reservoir. On the one hand, this ustroistvom or group of water bodies on a farm with a large land area, with another pond in the garden. We must remember that the pond in the garden mostly satisfied mostly your own needs, while the farmer needs to determine how important will be the farming in agricultural production. Following from this, determine its place in economic activity. Perhaps it will be agriculture, where the cultivation of fish will be your main activity or fish farming will become an integral part of the farm with the use of the reservoir complex. The latter area has received wide distribution as well as cultivation of fish goes well with other branches of agricultural production. Hence in the construction of the pond should not exclude the possibility of comprehensive use, for example for watering livestock, watering the garden, fire fighting purposes, breeding waterfowl. Continue reading

SERPENTINE SEA NEEDLE

Serpentine sea needle — one of the most common representatives of the family needle. Uncanny ability to blend in with the environment makes it almost invisible in the water.

HABITAT

Serpentine sea needle lives in shallow coastal waters, holding, usually at a depth of from 2 to 15 meters and Found that fish in the Atlantic ocean from the southern coast of Norway to the northwestern coast of Africa and the Mediterranean, Black and Baltic seas. Quite often it can be found in the brackish waters of river estuaries.

DID YOU KNOW?

To maintain the vertical position of the sea needle help gases accumulated in its swimming bladder.

Serpentine sea needle is able to suck in the mouth the prey from a distance of 3-4 cm.

The most rich in species needle fish tropical sea. Many species have camouflage coloring, but some wear very bright outfits.

Having tight, inflexible body and only one dorsal fin, serpentine sea needle floats is very bad. Long swims fish are not capable of, and stay in the open sea is simply disastrous.

The pipefish eggs are only 1 mm in diameter.

Males of all needle fish are carrying eggs in brood pouches formed by the lateral folds of the skin. Stretching along the abdomen of the fish globalperspective caviar inflow of fresh water. In some species skin folds are rolled inward, hiding the eggs, or form a pocket that isolates the seed from the external environment. The embryos receive oxygen through the inner wall of a marsupial pouch, densely penetrated by blood vessels.

The sea needle is easier to see when it appears jj£ on a sandy bottom, leaving shelter among the algae. Continue reading

The water balance of the Black sea.
The main feature of the water balance of the Black sea is a significant excess river runoff (river in the sea bring about 355 km 3 of water per year)…

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Fish
There are freshwater and marine fish. How do they live in the water? They breathe the oxygen dissolved in it. Every time you open your mouth, the fish absorbs the…

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The variety of fish.
Benthic and demersal fish, mainly marine. Sedentary predators with a large head. Characterized by the ability to produce sounds, including very loud. 1 family, 22 of the genus, 78 species.…

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