Big catfish weigh over a hundred pounds, and fish weighing thirty to forty pounds are not uncommon.
There are people the idea that som fish dirty, eats only carrion. No, catfish is a predator. Yes any and its main prey — fish. Do not hesitate to take it and frogs, leeches, crayfish and river shells, with pleasure eats any animals trapped in the water. Often had to meet som floating birds in the stomach. Although likely, the fish were caught by hunters wounded weakened birds. But on any other river you will hear stories about the huge predators living here in this concrete pit and simply packs feeding domestic geese and ducks.
Beginning with the warming water catfish actively feed on fish, especially the ROE ceiling. Thus, reward yourself for a long post.
A predator usually hunts from an ambush without attacking actively, as perch or pike, and just sucks in the little thing swirling around it. It is equipped with magnificent control devices — mustache. Thanks to them he can find food and darkness, and even in very dirty water. And if it does reciprocos, lightning-fast and very short, never the pursuit of prey after a miss. Continue reading
Marine aquarium healthy person. For that we need an aquarium? To evaluate these and other advantages of the aquarium, it is necessary to choose it correctly, taking into account the most important reasons. Of course the manufacture of marine aquariums business professionals and they will definitely better, so we appealed to the Kyiv company Ecoref for advice on choosing a saltwater aquarium.
First, the size and shape of the tank. Main materials, which are made aquariums: silicate and acrylic glass. The reservoirs of the silicate glass hard, possess good light transmission, resistant to small mechanical action (e.g., cleaning), but at the same time fragile.
Aquariums acrylic glass is virtually impossible to break, but at the same time they are sensitive to scratching. It is not recommended to wash them with the introduction of active chemical means. The aquariums of complex shape are made only from acrylic glass. Continue reading
In the World ocean inhabits 180 thousand kinds of animals
According to scientists, man eating fish and other marine animals that uses only 0.02% of the primary production of seas and oceans.
Blood pressure in arthropods 5-10 mm Hg. article on the green frog – about 40, active fish – 65-75, birds and mammals – 120-180.
In rivers of Central Europe is inhabited on average 40-50 species of fish in the Danube – about 70 species, while the Amazon is more than 1 thousand kinds of all kinds of fish.
Many animals are very demanding in terms of ambient temperature. For example, Antarctic fish Trematomus lives at water temperatures of 1.9 O. temperature Fluctuations in their habitat at all times of the year do not exceed 0.1 A. Already at +60 the fish dies. Continue reading