Fish farming, practiced in Ancient Egypt, as evidenced by the sources dated about 2000 BC, over four thousand years ago. In Mesopotamia, in temples the priests kept the fish in ponds. Fish were kept in ponds in ancient Rome and Greece.
But only in China began to engage in purposeful breeding of different breeds of fish, which we know under the name goldfish.
To the right is a detail of a mural in Egyptian tomb, which depicts a pond with fish
Goldfish is the usual subspecies of the goldfish ( Carassius auratus ). It is assumed that the subspecies living in China, was separated from the rest of toothcarps formed millions of years ago mountains. This subspecies, which is West of the Himalayas is not found, when it was developed ornamental goldfish.
Left – map showing the distribution of toothcarps ( Cypridontae ), to which the goldfish belongs, and the primary habitat of a goldfish. In the wild this fish niceley rivers, lakes, ponds and all dents filled with water. Carp undemanding and can live in flowing and stagnant water. In nature, fish may have different color variations, depending on ambient conditions. The most important of these conditions is light. Continue reading
The black sea resorts of Crimea, Caucasus, Bulgaria, Romania – the most popular in summer and autumn seasons. We will talk about what dangerous marine animals can meet vacationers.
In the Black sea is home to two species of anemone (or sea anemone). This coelenterates animals, on the tentacles which have stinging cells that emit a strong poison. However, they cannot penetrate human skin, so in contact with Actinia he feels a slight burning.
To coelenterates animals are treated and all known jellyfish. The largest jellyfish – eared (Aurelia, or the sea saucer) and kornerot.
Aurelia is easily distinguished from Camerota on telcobridges body shape. These jellyfish are harmless enough, and the consequence of meeting with them is a slight reddening of the mucous membranes of the mouth and eyes.
Kornerot has a mushroom shape, from under a round dome with a diameter of up to half hangs a crown of tentacles. Stinging cells are located at comerota only on the tentacles, on the dome they are not. So IF YOU MET WITH SUCH a JELLYFISH WHILE BATHING, CALMLY TAKE HER HAND to the TOP of the DOME AND TAKE AWAY FROM HIMSELF, TRYING TO keep the TENTACLES have NOT TOUCHED YOUR BODY. Continue reading
International Black sea day (International Black Sea Day) is celebrated to commemorate the day in 1996 when six black sea countries — Bulgaria, Romania, Turkey, Georgia, Russia and Ukraine — signed the Strategic action plan on rehabilitation and protection of the Black sea .
This Plan was developed after a thorough research of the marine environment, which showed that its viability has deteriorated significantly in comparison with the previous three decades.
Its main purpose was to draw international attention to what irreparable damage to the sea causes overfishing, water pollution and global warming .
On this day in the participating countries this document a variety of activities devoted to the problems of the Black sea and preserving its unique ecosystem. Their main aim is the formation of public opinion in defense of the sea and facilitation of education of ecological culture of the population.
Fishing on the Black sea
On the Black sea can be successfully catch fish with spinning. For those who first planned to go fishing on the Black sea will give recommendations on caring for gear and introduce undesirable for a catch and even dangerous inhabitants of the Black sea: a sea Scorpion and a dragon. Continue reading