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
Every year commercial fish species is becoming less. Scientists warn that may soon Ukrainians can not take grandkids fishing — will catch nothing.
“Back in the thirties dried up stoked the stove”
— In recent years we have almost completely destroyed river ecosystem, — says Sergey Mezhzherin, doctor of biological Sciences, Professor Institute of Zoology. I. Schmalhausen. — In Ukraine there is a huge estuary — the sea of Azov, which was considered the most cost-effective and highly productive ecosystem. Here the fish bred naturally. About how much it was in Azov sea, says a historical example: in the area due to the lack of firewood up to the thirties of last century the house was heated by dried specimens, casting them into the furnace instead of logs. Now it seems incredible, however, the number of freshwater fish in the country (even compared to the seventies of the past century) has decreased at least thirty times. Peregorazhivanie dams of the Dnieper, Kuban, don, led to a sharp saloneni water. Now we can confidently talk about a real environmental disaster and in fact of mass death of fish in the rivers of our country.
“Every year in Ukraine disappear two rivers”
Another reason for the lack of fish in Ukraine: loss of grasslands and floodplains — the most scarce of the environment and natural resources in our territory. In addition, in recent years disappear… the river. For example, on the Kiev — Odessa highway signs with the names of small waterways exist, but they are not. They are either overgrown with weeds or completely gone underground. Continue reading
Retention of fish caught
Retention of fish requires the angler skilled and decisive action. Quite commonly, because of inexperience or even excessive shyness freshly caught fish beats the ground or the bottom of the boat beneath the feet of the angler. And when she finally manages to pick up for long-term storage in the load it won’t work anymore. And cooking qualities of fish are significantly reduced.
Almost all peaceful fish, regardless of size and weight, after removal from the water is captured firmly by the back of the Gill covers. The stronger beats and resists the fish, the stronger must be its capture. In this case, the angler must remember that if the fish is supposed to store in a CORF, it is possible to shift the grip towards the Gill covers, especially under the gills, is unacceptable. Conversely, if fish is urgently preparing for the pan and storage is not intended, the pressure on the gills adjacent to the cavity must be quite strong. Such capture allows you to easily remove the hook from the esophagus. In the future, the fish intended for evisceration, outbreaks were sacrificed and laid in a cool place.
The angler should remember that all predatory fish weighing more than 2 kg, in addition to sharp, and inogda impressive in size, fangs and spiny top fin (perch), stacked, bent inwards the torso of the teeth (pike) and razor-sharp notches along the perimeter of the Gill covers (perch), and has a number of additional spines and spines on the Gill covers, Continue reading