For the keeping, breeding and rearing fish use of different ponds: lined, dug, used peat quarries and instream ponds, cages and basins, small reservoirs and lakes.
The operation and construction of pond intended for fish production, requires compliance with certain rules, which correspond to fish and hydraulic requirements. First, you should determine the orientation of use of the reservoir, i.e. it is designed for the cultivation of food fish or for use in the design of the site. This will depend on its size, the device of the reservoir, depth, shape, mode of operation.
A pond for the cultivation of food fish is very different from the devices of decoration. To this reservoir are a bit different requirements. It does not make sense to do complex bottom topography, indented coastline, depths off the coast, laying on a bed of special soil, decorative elements. The main attention should be paid to the layout of the bed of the pond, the supply of the reset options and a good water supply. Fish farming will benefit, assuming the decision of questions of operation of the reservoir and construction. If the device pool determines much the size of the land plot, which is released under the dispensing reservoir. On the one hand, this ustroistvom or group of water bodies on a farm with a large land area, with another pond in the garden. We must remember that the pond in the garden mostly satisfied mostly your own needs, while the farmer needs to determine how important will be the farming in agricultural production. Following from this, determine its place in economic activity. Perhaps it will be agriculture, where the cultivation of fish will be your main activity or fish farming will become an integral part of the farm with the use of the reservoir complex. The latter area has received wide distribution as well as cultivation of fish goes well with other branches of agricultural production. Hence in the construction of the pond should not exclude the possibility of comprehensive use, for example for watering livestock, watering the garden, fire fighting purposes, breeding waterfowl. Continue reading
Distribution: various water bodies, often with standing water and brackish water, often in streams of India, Sri Lanka, Myanmar, Burma as well as around Indochina.
Body length up to 35 cm in the aquarium, up to 70 cm in natural waters.
It got its name for the original breathing apparatus, reminiscent of a light, by which the fish can tolerate adverse gaseous regime of the reservoir. This unit is two bags, stretching on both sides of the back along the entire body, the walls soaked with lots of blood vessels.
Body structure and coloring . elongated, laterally compressed body; when swimming the fish is a snake-like meanders. Coloration modest gray-brown. Anal fin long, the others small and rounded. Head with small eyes, mouth 4 pairs of whiskers. The whole body and fins dark brown. Dorsal and pectoral spines armed with strong, injection which is very painful.
In some American books say that the shot messageremove soma lethal at all, but actually a lethal outcome is possible only in people who are prone to allergies. Action messageremove catfish venom and bee venom are similar, feeling about the same, and when necessary, the treatment prescribed is similar. Continue reading
Among the inhabitants of the Black sea are found animals, contact with which to humans can be dangerous. These include some fish (sea dragon, sea cat, sea Fox, sea fish) and jellyfish (Aurelia, kornerot).
The most dangerous fish of the Black sea is a sea dragon . this is a small sized fish, has on the back two fins, one of which (smaller) is located closer to the head and contains a poisonous spikes, and the second (large) has a non-poisonous spikes.
Meeting the man with the dragon can occur while swimming in the sea, fishing (when the fish barehanded off the hook or pick from the nets), underwater hunting.
A shot of sea pet dragon causes the victim severe pain . which increases, reaching maximum severity in 30-40 min At the injection site can appear swelling, edema, and even may be necrosis (necrosis of skin). Deteriorating General condition of the victim: there is a weakness, lethargy, headache, pain in the heart region, sweating, increased body temperature to 38-39 °C. In severe cases of poisoning, the possible gross violations functions of the nervous system, the heart and respiration, collapse, shock and even death.
Emergency care. The injection site is widely grab with two fingers, squeeze a drop of zidkostei wounds, and then for 15-20 minutes sucks out the poison . constantly spitting saliva. Then the injection site was washed with a weak solution of potassium permanganate or boiled water, lubricated with alcoholic solution of iodine or Zelenka (in the absence of them, you can use the alcohol or Cologne). Take measures for urgent hospitalization of the victim to the nearest hospital, in case of severe poisoning in the intensive care unit. Continue reading