In honor of the coming of the pores of the holidays we offer to your attention a selection of interesting facts about the Black sea.
The first mention of the Black sea are found in documents relating to the V century BC. It is on the Black sea, Jason and the Argonauts went to Colchis for the Golden fleece.
1. The ancient Greek name of the sea — Pont Aksinsky (gr. Ἄξενος Πόντος), meaning “Inhospitable sea”. It is assumed that the sea was named so because of difficulties with navigation. Later, after a successful exploration of the coast by Greek colonists, the sea became known as the Pontus Euxinus (gr. Εὔξενος Πόντος, “Hospitable sea”). Romanian Black sea Marea Neagră is called.
2. A characteristic feature of the Black sea is complete (except some bacteria) absence of life at depths greater than 150-200 m. the fact that the deep layers of the Black sea is saturated with hydrogen sulphide.
3. In the scheme of currents of the Black sea there are two huge closed cycle with a wavelength of 350-400 km In honor of oceanographer Nikolai Knipovich, who first described this scheme, it was called the “Glasses of the Knipovich” Continue reading
Aquarium gold fish is a small miracle, caressing eyes. Aquarium goldfish soothe the nerves, to watch them is a pleasure. But watch for goldfish should be regularly and for the purpose of any change in their appearance which may indicate illness. Healthy goldfish, especially the young, show great interest in what is happening around, learn his breadwinner, eat well. If a goldfish is swimming at the bottom and not eating, then something with health at it not okay.
The physical signs of the disease gold fish aquarium: Fuzzy coating Small white spots on the body Bloated body Red gills
Rapid breathing Rotting fins or tail Increase eye Wounds, hemorrhages on the body
The sooner you are seen the signs of illness aquarium fish, the more chances to cure it.
Some goldfish diseases are very contagious, and can affect the other aquarium inhabitants. By capturing the disease early, a goldfish can be saved by applying antibacterial or antifungal drugs, but before moving it to another aquarium. Continue reading
If a person is not an aquarist, he can perceive the content of fish in the tank as violence over living nature, because we are picking up marine animals out of their habitat – the seas, oceans, which are their natural habitats. To some extent it is, however, one tries to ennoble the aquarium as best as possible to bring the living conditions of fish to natural conditions, to create an image in the design of the aquarium in the likeness of the house of marine life.
Not every person available will have similar luxury marine aquarium, although it can be different size from the usual small, which is positioned on the table, to huge that can fit even people in the pool. The crux of the problem lies in the complex care for fish.
Regardless of size, in the aquarium must be properly done:
– water filtration; Continue reading
Perciformes (lat. Perciformes) — a detachment of the class of bony fish. There are over 6000 species and about 150 families. Characteristic features: part fin rays has the form of undifferentiated acute spines, pelvic fins are usually located under the breast and sometimes in front of them; swim bladder not connected with the intestine.
The squad is part of the Perch family (Percidae), with 160 species, many of which have important commercial value. In particular, the Zander (Lucioperca), several species of which live in the basins of the Black and Caspian seas. Some of them live permanently in rivers, others in the seas, others are semi-anadromous fish coming from the rivers into the sea. Perch (Perca) are widely distributed in the rivers and lakes of Russia. Are also objects of the fishery.
The family of Labyrinth fishes (Anabantidae) is a kind of fish, characterized by the presence of saccular outgrowths of the Gill cavities, which are used for temporary breathing air. These fish, such as anabas (Anabas testudineus), often come out to shore and even climb trees. They live in fresh and brackish waters of tropical Africa, Asia and the Islands of the Malay archipelago. Some species, such as gourami, are used as aquarium fish. Continue reading
The aquarium has long been considered not only a stylish decoration but also a useful tool can have a laxative effect. Salon aquariums “Aqua boutique” Petersburg offers a full range of services from installation to decoration aquarium marine aquarium. You
Many aquarists spend your vacation at sea. While Snorkelling, they’re watching sea animals that live on sandy soil, in thickets of seaweed or the rocky coast.
How to make an aquarium
When izgotavleniem the size and shape of each defines itself. In any case, careful execution of work and exact observance of instructions. Together to work easier.
Device for aeration of water
The animals in the aquarium when removed from the water breathing oxygen and expelling carbon dioxide. So water must constantly enter new oxygen, and carbon dioxide removed from it. This exchange occurs mainly on the surface of the water. Continue reading