There are freshwater and marine fish. How do they live in the water? They breathe the oxygen dissolved in it.
Every time you open your mouth, the fish absorbs the water. The oxygen dissolved in the water absorbed inside the body of the fish straight into the bloodstream. The wastewater is then discharged through the gills, usually located on the sides of the fish’s body, behind the head.
Mudskipper is a fish with very interesting habits. There are jumpers in the Eastern Atlantic, Indian and West Pacific ocean. It lives most often in the quiet bays near river mouths. This remarkable fish that at low tide remains on land and, using fins and a special breast suction Cup, can climb trees to a height of more human growth: here it preys on insects.
In fresh water rivers and lakes inhabited by many species of fish. Freshwater fish feed on different food. Some eat algae, other aquatic insects and mollusks. Some fish eat other fish; they are real predators.
In certain types of freshwater fish are found only in one river or lake, others dwell in many places. Sometimes fish eggs is transferred to a new place, glued to the feet of waterfowl, and sometimes fish can move people. Some fish themselves swim in other rivers. When the salmon is four years old, he leaves the river and goes to sea.Having lived in the sea and two more years, he returns to lay her eggs. Many salmon return to their native river, but some moved to other rivers. Continue reading
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
Aquarium fish Cardinal
One of the most undemanding and amusing fish – cardinal. They are very hardy and eat any food. The water temperature should be 18-23 0 C, but the best cardinal feels at a temperature of 19 to 21 0 C. it is Necessary to remember that the cardinal fish are gregarious, and need to have them immediately a group of three or more individuals. For these aquarium fish, the content is really very simple. They are very clean, so clean the aquarium often there is no need. If left without food for some time, they can be interrupted and the algae. For the cardinals it’s very funny to watch, they are very lively and playful.
Another option for the novice aquarist – Siamese Cockerel. They are quite hardy. And, although for better health of any fish it is recommended to install in the aquarium filter, they can do without it, being content with very little space. Siamese males are larger than the cardinal. They need warmer water. They have a drawback – they are very aggressive, so they need to choose carefully. Cockerel can even quarreling with his brother. But still it is very beautiful, bright fish, which can decorate the life of its owner.
Spotted catfish is the most livable fish. They are friendly and don’t mind individuals of any form. These fish for the aquarium is just perfect. They grow quite large – up to four inches in length. Catfish thermophilic – they need a temperature of 22 to 32 degrees. The special feed they require, because usually eat what remains of the feed other fish, but sometimes you need to treat them special food that is sold in pills. This food and sinking catfish will be able to get to it. Continue reading