Sharks (lat. Selachimorpha) is a superorder of cartilaginous fish comprising eight teams, twenty families and about 350 species. Members of the superorder widely distributed in all seas and oceans, there are also freshwater sharks. Most species belong to the so-called real predators, some species, particularly whale, and giant deep-sea sharks, eat plankton.
For many millions of years before the planet appeared the first man, ruler of the prehistoric seas was a shark. The power of evolution sowed on Earth, countless forms of life that could not stand the severe tests and disappeared one after another, as the shark continued to exist. One prehistoric era is succeeded by another, have any amphibians, reptiles, birds, and mammals – the shark continued to exist. Pterodactyls – the winged reptile for millions of years plied the skies, disappeared from the face of the Earth. Dinosaurs-Triceratops, Brontosaurus, allosaurus and many other “saurus”, it is important chestvovali on our planet died out, leaving no trace. As the shark continued to exist.
About 20 million years ago in the sea scoured a huge Stingray, weighing over 100 pounds, and more than 25 different species of sharks, including sharks, reaching 36 meters in length. The length of these monstrous sharks was Opredelenie their huge teeth. Some of the teeth found in California, weighing 340 grams each and reach 15 centimeters in length, and seven – and ten teeth are quite common. They are triangular in shape and closer to the teeth of modern great white sharks that do not exceed 5-6 inches now with a body length of shark of 12 meters (maximum length). These teeth belonged to the ancestor of the modern great white shark the carcharodon, in huge quantities inhabited the seas. When they were first found in the seventeenth-century scientists, naturalists believed that this fossil bird tongues or teeth of serpents. They could not imagine that this shark’s teeth, and ascribed them to the mythical animal. Continue reading
Here You can read 35 tips for cooking fish.
1. When buying fish note: fresh fish sinks in water, stale and splive.
2. Clean the fish very unpleasant: scales badly behind, sticks to the fingers, sprayed on all sides. Therefore it is better to brush in the appropriate bowl (the sink) with cold water.
3. Fish to cut better and easier way:
Clean off the scales and mucus.
If the fish is slippery,and slipping away from the hands, dip fingers in salt and you will be easier to keep it.
4. When cleansed you need to rinse in cold water.
5. To well behind the scales, the fish is lightly wiped with vinegar and wait a few minutes.
6. Difficult to clean the scales of a perch, tench, therefore, scald them or hold for 30 seconds in boiling water, the scales will be easy to separate.
7. Next, cut the belly from head to anus and gut.
8. To remove inside abdomen black film. From the head to remove the gills and eyes. Continue reading
The pond on the site can be a favorite vacation spot. Pond fish is a complex hydraulic structure. What is difficult in General, consists of a number of simple rules. If you apply patience and diligence to make a pond with their own hands for cultivation of fish can any householder on their needs and your taste.
Why you need a pond
The pond is always a decoration of the site, on its edges, you can plant the plants. His presence on site creates a special microclimate.
The opportunity to grow organic fish. In our time – is not unimportant!
Get pleasure from fishing. If there are no natural water bodies, to create conditions useful for the health of the hobby. This can be a family holiday or with friends.
The choice of location
The reservoir should be placed taking into account that till 11 am, he should be well publicized. In the daytime, to 15 hours for pond fits the shade or shade. In warm water are good conditions for development of algae, reducing oxygen for fish.
Deciduous trees should be at some distance from the pond so that the leaves did not litter the pond. The leaves of some trees have harmful effects on fish, it is also possible to transfer aphids on aquatic plants. Continue reading