Outdoor open ponds, which are becoming increasingly popular among vacationers and simply living in the countryside, in winter, of course, freeze. Tightly and freeze. Thick, sometimes almost a foot of ice covers the access of air to the water. Meanwhile, these reservoirs are very densely inhabited by any living creatures. At least – that all sorts of beetles and larvae of dragonflies. In the waters find shelter for the winter frog. And how high is this fish wild or ornamental, sometimes very expensive. And all of them, even those who is in a state of winter hibernation, the necessary oxygen in the water.
Everyone knows that for example carp winter after he buried into the bottom mud. And seemingly no Zamora they are not afraid. But it is in nature, in large enough bodies of water. In the same garden ponds and pools, which are usually overpopulated and aren’t many (if any), and the amount of water attributed to each individual fish is much smaller. And then there appear uncontrolled parasite – frog, and others, also consuming oxygen. In General, in winter under the ice even sleeping goldfish is not sweet. What can we say about the fish, not falling into the hibernation. For example, the roach, the perch and others. As such, playful and not shy fish are a summer decoration of the water, playing at its surface, collecting the fallen insects. Petomane to protect from winter Zamora.
In order to protect the fish from Zamora, it is necessary to ensure the flow of oxygen in the water. Or rather, to ensure contact of water and air, at least in a small area of several square decimeters. I.e. to arrange in a frozen pond wormwood. This can be done in several ways. Continue reading
It should be remembered that on the proper selection of fish depend for their future livelihoods and development. In aquariums, the pet shop exotic fish swim. Here and bright blue or crimson cocks, large Crescent angelfish, handsome shiny neons, minors, goldfish and their varieties: veiltail, telescopes and many other showy fish. The combination of various shapes, a range of colors — all this is striking in its beauty and impressive picture. And quite understandable is the desire to acquire the most vibrant and spectacular fish. Fish are living beings with their own habits, needs, tastes, temper, which you should know and consider. For example, goldfish. It is unpretentious, not afraid of temperature fluctuations and not choosy with food. But the mahseer of sumatranus, Vice versa, capricious, effeminate and therefore requires a relentless worries.
Or take game fish. She is very afraid of cold, significant reduction of water temperature may be detrimental. Of course, for all tastes will please. However, choosing fish for the aquarium, it is necessary to consider their features. It is recommended to adhere to the following mandatory conditions of settlement of the aquarium. If its volume is small (about 10 litres), more than three fish in it to contain impossible, as the norm is three liters of water per fish length of five or six cm But will grow more.
Than rupnieciba, the more living space it needs. Therefore, we recommend to buy (or produce) the aquarium at least 30-40 litres of water, which will contain 10-15 fish. To give the fish in the aquarium must also thoughtfully. Combine the fish can only be equal in size, behavior and environmental conditions. Cold-water fish cannot be placed together with warm-water, predatory peace and the Oversight etc. when moving may cause the death of fish. Continue reading
Class – Cartilaginous fish / subclass – Plasminogene fish (Elasmobranchii) / Superorder Sharks (Selach)
History of the study
The history of the evolution of hammerhead sharks has been very successful. In our days it is one of the most common shark species in the world, and in some places they’re just going in astounding quantities. Hundreds of individuals run around seamounts.
Few other species of sharks form such large flocks. This is one of the greatest mysteries of the ocean. Why are so many of these sharks gathered in one place, at one time. Oddly enough, in these large schools the majority are female, and we don’t yet know why this happens.
Widely distributed in tropical and temperate waters of all oceans, except, of course, the Arctic. Most commonly found in the Gulf of Mexico and Caribbean sea, near Hawaii, Philippines, New Zealand and many other seas of warm and temperate latitudes.
Hammerhead shark is truly one of the most unusual sharks. Her appearance seems truly alien, but it is quite common in tropical seas around the world.
When you look at the shark hammer head there is just one question – why this animal has this kind of pharmagology? What is it? And how it appeared? After all, nature creates freaks. And if it generates by mistake, they can not compete with “normal” types and die. All the more strange that there are many types of hammerhead sharks of all shapes and sizes, at least 9 different species. Surely nature could make so many mistakes and “give birth” so many freaks, well there are millions of years?! Continue reading