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
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
Fish of the Black sea – a total of 193 species. About all we will not speak. But some of the fish species of the Black sea is worth mentioning.
The mullet is a genus of fish of the family of mullets, numbering two kinds. This valuable little food fish reaches a length of 40 cm red mullet are Distinguished by the presence of long “whiskers” on the lower jaw, which muddies the sand on the sea bottom and catching small animals. Live in the Mediterranean and adjacent seas. Fishing for red mullet .
Goatfish or red mullet
Kalkan, the largest black sea flatfish, reaches a length of over 70 cm and a weight of 12-16 kg. more Dark spin Kalkan (formerly the left side) covered with numerous bony tubercles. Hard skin fish owes its name to the Turkish word “Kalkan” means a shield with additional protection, umbono. Kalkan inhabits sandy and Shelly soils of the seabed. Winter and summer it is the depth, in spring and autumn makes a small migration and moves to shallow water. It spawns from April to July. Feeds on demersal fish and crabs. The body flounders glosses covered with scales. Eyes, unlike Kalkan, moved to the right side. Length of Glossa is not more than 30 cm. Continue reading