Health. Poisonous sea creatures
Rest on the sea, and especially on the ocean side is always very attractive. And doubly in uncharted territory. But the water element can become a trap for man. People are afraid of sharks, but don’t know anything about poisonous aquatics – sea creatures, touching which can cause toxic shock or paralysis.
In a light it will burn, after which there can remain a scar. Victims of poisonous aquatics can become naive nature-lovers, who, wearing a mask and flippers, jump into the depths of the sea or ocean without a wetsuit. Very helpful first learn about what sea creatures live there. In tropical seas often on the whole water area covers a quarantine regime because of the approach to the shore dangerous for a man of aquatics or aquatic organisms. Better to meet these requirements.
Poisonous sea creatures
1. Jellyfish and siphonophora physalia
Jellyfish are marine invertebrates that live in all the seas and oceans. There are more than 2,000 species of jellyfish, of which approximately 70 are dangerous to humans, a collision with them causes severe burns and may even cause a lethal outcome. The severity of the burns of jellyfish varies and depends on individual to individual. It may just be a burning sensation or pain that last from a few minutes to several hours. But someone may develop anaphylactic shock due to the intolerance of the toxin of jellyfish. The most dangerous type of jellyfish is the box jellyfish. It has a distinctive cube-shaped body. Burn this jellyfish causes severe intoxication and dermatitis, and possible death. The most dangerous of the jellyfish, Sahika barnesu and Carybdea alata, have another name – the sea wasp. It is a small jellyfish that live at great depths, but their powerful tentacles they are even capable of penetrating a wetsuit. Continue reading
The black sea is very suitable for kids: summer storm rare here – because the Black sea is small, the wind is harder to rock the waves ; W here there is almost no dangerous sea animals, and in water less salt, and it doesn’t sting the eyes. Here is to learning how to dive, first to get acquainted with the underwater world.
The black sea is surrounded by land, but it’s not the lake – the Bosporus and the Dardanelles coedine added it to the Mediterranean sea.
The Black sea flows into many rivers, so the salinity of its surface waters is low: 17 ‰ – grams of salt in a liter of water. Due to the low salinity reduced the biodiversity of the Black sea: the inhabitants of the seas and oceans can not tolerate salinity below 20 ‰.
Surface water of the Black sea is less salty and lighter, similar in temperature to the air ; in the summer it warms up. in winter it is cooled. It is familiar to us Black sea: in it, we swim and dive, catch fish.
C ovsem other – deep waters of the Black sea: from 50-100m – to the bottom, lying at a depth of two kilometers is more salty and heavy. their temperature is always constant and: o S. 9 – properties of the waters of the Black sea
Desalinated surface water is almost not mixed with the more saline deep waters: it prevents the penetration of oxygen into the depths of the Black sea. Deeper than 200 meters – the oxygen in the water of the Black sea is missing, the plants and animals there can not live, but live bacteria that break down down the remains of life and produce the hydrogen sulfide. Continue reading
One of the species of fish-surgeons ( Naso vlamingii ), the inhabitants of coral reefs. Figure out in Nature
It is known that fish living in marine reserves, the larger and more prolific than their counterparts in unprotected areas. Australian biologists have shown that, in addition, fish from reserves more trusting and therefore easier to catch. And when you consider that the fish constantly slips out of reserves to unprotected waters, this information can serve as an argument in favor of the establishment of marine reserves.
Long time was considered that the protection of individual sections of the World ocean cannot be effective because of its global reach and “openness”. But it gradually became clear that the ocean is not only global but also local effects of man. As examples of the latter can lead to construction in the coastal zone, the deepening of navigation channels, poorly regulated fisheries, wild life, etc. To protect against local influences began to create so-called marine reserves — marine protected area. Now there are more than 3000. One of the main goals of marine reserves is to provide safe and supportive in all respects of space for growing food fish.
Loginoremail that the fish in these reserves live longer, on average, grow to a significant size and leave more offspring than fish in unguarded water areas. It is natural to expect that some fish larvae, and adults, out of the reserves into surrounding unprotected areas. Indeed, the scientists showed that of the reserve located within the Great barrier reef. from 55 to 83% of juvenile percoid distributed around the reserve unguarded waters. Continue reading