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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

Marine aquarium – bonding, Assembly

The first work – bonding of sump

The Assembly of the aquarium I started with SAMP. Wanted to kill not just two but several birds with one stone. First, saving money, as the volume of cans was not small, and making the most of your own hands, you can save additional money on high quality equipment and aquatic organisms. Secondly, I wanted to check if I am able to do everything myself. Thirdly, and if I can, then: how will be glued is large and heavy aquarium. This should be checked. So took the glass thickness 8 mm – for the sake of experiment.

Looking glass led to the website of Crystal that cut glass on the laser machine and cut the edge. But the most interesting is the price, it was similar to an ordinary glass cutter. In General, called the office, learned what they need to know for the order, I printed your schematic and on the way to work drove to their office. Custom designed for 40 minutes we discussed all the details thoroughly, talked on related topics. Issue price turned out 2 300 – 2 400 RUB (or rather not remember). After 4 days I called and was told that you can take the glass. Stunned! Everything was Packed in thick cardboard, and if packable 2-3 leaves, all padded with additional cardboard. Sizes are met perfectly…

Buy aquarium sealant and masking tape took place without problems in the near Chkalovsk. And then began the most interesting – we had all the mess and neatly glued together. Wanted the clearances were exactly 1 mm. this value was calculated from all the walls and internal partitions. Two nights was meditating on improvised material – it was necessary to collect a frame (frame), which would allow appending to withstand the required geometry. Continue reading

Safety on the beach

Jellyfish are attacking the Mediterranean. Biologists-marine painters, studying the waters, is known among the most numerous and diverse populations of marine fauna, are sounding the alarm. If these invertebrates will continue to proliferate at such a pace, will not stand not only marine life, but vacationers here in the summer tourists.

According to Professor Stefano Piraino of Salento University in southern Italy, all 300 (!) kilometers of the beach, which he managed to fly on April 21, swarming with jellyfish. Himself Piraino heads the project control the population of jellyfish in the Mediterranean sea. The shift of the biological balance in the waters in favor of the jellyfish is due, firstly, global warming and, secondly, is due to excessive capture of fish and other edible inhabitants. In addition to jellyfish, thousands of miles of the Mediterranean coast there is no release from tourists onlookers. These “scientists with the air of a connoisseur” and armed with smartphones and “Apple”, relentlessly chasing an umbrella. During the four years of work of specialists in the framework of the mentioned project, the population of jellyfish is only increasing. Experts attribute this phenomenon to global warming. Convince them that the data that come from other areas of the world: is there a process develops in a similar way. Piraino says that on the island of Lampedusa, where the annual resting of about three hundred thousand tourists, you can swim only week of the whole summer. The rest of the time the water is filled with jellyfish.

But that said, the biologist, studying jellyfish at the Institute of Oceanology of Barcelona Jose Maria Gili: “jellyfish have increasingly become a problem around the world, the Mediterranean is no exception. And the farther away from the shore, so they are more insidious and harder to fight them”. This spring off the coast of Valencia Catalogue and specialists of the Institute have recorded a surge of population flowing down jellyfish Pelagia noctiluca . which is one of the most poisonous members of the species. Continue reading

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