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TOP facts about the Black sea

Today is the international Black sea day. A few Crimeans know that the sea in which they so love to swim, listening to the sound of waves, breathe the sea breeze, in many ways unique. We offer you a selection of interesting facts about the Black sea.

1 – Mountains around the Black sea are constantly rising, and the sea itself increases. And if the mountains grow only a few inches per century, sea occurs on land with a speed of 20-25 cm over 100 years. Some ancient cities had already disappeared at the bottom of the sea.

2 – Among planktonic algae found in the Black sea, there is a very unusual view nochesvetka. She has the ability to Postretirement, and because of it in August, the Black sea is sometimes lit.

Nochesvetka.

3 – the Only mass shark inhabiting the Black sea prickly shark Katran. He is afraid of people and rarely comes to shore. The only danger to humans represent the dorsal fins of crambe with large poisonous spikes. Continue reading

How to breed fish in ponds

Pond fish farming is the breeding of commercial fish in specially adapted or constructed for this purpose reservoirs. Farms can be full (full system) or incomplete (napolnitelem). In full system retailing the fish grow from egg stage to marketable, and in breeding — pedigree producers for full-cycle hatcheries and commercial farms.

Not in full-cycle farms planting material is grown marketable fish. They are of two types. The widest form of fish farming is feeding the carp fish farm . Spring here are imported from hatcheries to fingerling of carp weighing up to 30 grams, put them in the fattening ponds,in the fall catch of marketable fish with an average weight of from 500 to 800 grams. To grow fish in feeding the economy easy and accessible to everyone farming.

Fish farming in ponds

Carp is a widespread inhabitant of warm-water ponds. For several hundred years, farmers brought from the wild carp are some of the cultural breeds of carp that have fast growth rate and high fecundity. Widely known scaly, mirror, naked and ramcity carp, but most are bred the first two. Continue reading

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

In the Ukrainian rivers appeared dangerous predators

Every year commercial fish species is becoming less. Scientists warn that may soon Ukrainians can not take grandkids fishing — will catch nothing.

“Back in the thirties dried up stoked the stove”

— In recent years we have almost completely destroyed river ecosystem, — says Sergey Mezhzherin, doctor of biological Sciences, Professor Institute of Zoology. I. Schmalhausen. — In Ukraine there is a huge estuary — the sea of Azov, which was considered the most cost-effective and highly productive ecosystem. Here the fish bred naturally. About how much it was in Azov sea, says a historical example: in the area due to the lack of firewood up to the thirties of last century the house was heated by dried specimens, casting them into the furnace instead of logs. Now it seems incredible, however, the number of freshwater fish in the country (even compared to the seventies of the past century) has decreased at least thirty times. Peregorazhivanie dams of the Dnieper, Kuban, don, led to a sharp saloneni water. Now we can confidently talk about a real environmental disaster and in fact of mass death of fish in the rivers of our country.

“Every year in Ukraine disappear two rivers”

Another reason for the lack of fish in Ukraine: loss of grasslands and floodplains — the most scarce of the environment and natural resources in our territory. In addition, in recent years disappear… the river. For example, on the Kiev — Odessa highway signs with the names of small waterways exist, but they are not. They are either overgrown with weeds or completely gone underground. Continue reading

Storage of catch

Retention of fish caught

Retention of fish requires the angler skilled and decisive action. Quite commonly, because of inexperience or even excessive shyness freshly caught fish beats the ground or the bottom of the boat beneath the feet of the angler. And when she finally manages to pick up for long-term storage in the load it won’t work anymore. And cooking qualities of fish are significantly reduced.

Almost all peaceful fish, regardless of size and weight, after removal from the water is captured firmly by the back of the Gill covers. The stronger beats and resists the fish, the stronger must be its capture. In this case, the angler must remember that if the fish is supposed to store in a CORF, it is possible to shift the grip towards the Gill covers, especially under the gills, is unacceptable. Conversely, if fish is urgently preparing for the pan and storage is not intended, the pressure on the gills adjacent to the cavity must be quite strong. Such capture allows you to easily remove the hook from the esophagus. In the future, the fish intended for evisceration, outbreaks were sacrificed and laid in a cool place.

Predatory fish

The angler should remember that all predatory fish weighing more than 2 kg, in addition to sharp, and inogda impressive in size, fangs and spiny top fin (perch), stacked, bent inwards the torso of the teeth (pike) and razor-sharp notches along the perimeter of the Gill covers (perch), and has a number of additional spines and spines on the Gill covers, Continue reading

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