The fish fauna of the Black sea is peculiar. The class of fishes that includes about 20 000 species, is divided into two sharply distinct branches — the cartilaginous and bony fish. In the Black sea are mainly of bony fish and only four cartilaginous family: cat sharks, prickly sharks, common stingrays and stingrays. Out of 167 species of sea fish of 37 species is primarily freshwater, 27 – 103 and brackish – marine. A significant part of the primary freshwater species that live in coastal lakes and river estuaries, can tolerate some salinization of water. Many of them (several species of herring, almost all servie fish, etc.) are semi-migratory and passage species, and some species are fully adapted to marine conditions of life.
Most of the group of brackish-water fishes of marine origin can withstand large desalination, and others (several species of gobies, etc.) live in fresh water. It is autochthonous relict species characteristic of the Ponto-Caspian basin. Their origin is connected with seas that filled the black sea geosyncline during the Neogene. In the third group — marine fish — can distinguish Continue reading
My aquarium fishes – a complete version of the electronic encyclopedia aquarist in Russian. Detailed, colorfully illustrated guide that will be extremely useful to all beginning hobbyists and experienced enthusiasts of this fascinating magic world of aquariums and aquarium fish.
My Pets. Fish – very simple and easy to use electronic directory, the most detailed way all aspects of painting and the correct selection conditions of the aquarium are given detailed names and descriptions of aquarium fish, the rules of their content and nutrition, the necessary conditions that need to be created for the health and reproduction of each species aquarium fishes, plants, snails, and other aquatic animals.
The encyclopedia contains three main sections – “the Aquarium theory”, “Tips for beginners” section and for “Experienced hobbyists”. In turn, each of the sections are very well divided into subsections, each of which is fully, in great detail and comprehensively deals with precisely the question to which it is devoted. Continue reading
Let’s say you have a aquarium and live fish, their good development and reproduction will be real only when complete and varied feeding. The ideal food for all aquarium fish is that fish consume in the wild. In their natural habitat, different species of fish eat different food based on the age, habitat conditions.
Different fish species fed plant food, other animals, others can absorb both animal and plant food.
In nature it is extremely rare to see as the fish is feeding.
As mentioned above, the nature of the food fishes are divided into three types: carnivorous, herbivorous and carnivorous. Herbivorous fish is a fish – vegetarians. They prefer a diet of aquatic plants. The second type of fish – carnivorous – they eat invertebrates. Well, the predatory fish feed on smaller species of fish and animals. But even herbivorous fish do not stop occasionally feed on small fish species.
Juveniles of different species of fish begin to feed in the period from several days to several weeks from the time of hatching from their eggs. Food becomes a variety of microorganisms, for example the smallest algae, protozoa aquatic organisms. After a while, stronger fish eat the crustaceans. Only poslevoennogo maturation or the fish becomes herbivorous, or carnivorous, or predatory. Continue reading