Sturgeon are a family of valuable commercial fish, include such species: sturgeon, Beluga, sturgeon, barbel, etc.
There are two ways of cultivation of sturgeon fish: extensive and intensive. If the extensive method of breeding in natural water produce larvae that have already come to the active power. For the application of the intensive method is needed in the pond to put the grown the fry, their weight is 2-3 grams. They are more protected from bugs, predators and the extent of their survival is higher than in the larvae.
Larvae of sturgeons receive when conducting natural spawning: ponds with a depth of 35-50 cm, in the spring fill with water and run back sturgeon females and males. Their number depends on the size of the reservoir and characteristics of the sturgeon species.
At the end of the spawning period females and males removed from the reservoir, and the larvae, after their transition to active feeding, or placed in natural rearing ponds. Continue reading
“The world fish” – Fish-needle. Think about why the so-called marine fish? Dorsal fin. Who attracted the attention of a dragonfly? Light, 2008. Marine fish. Aquarium fish. Carp. Pectoral fin. the teacher of initial classes. Disminuci. Svetly secondary school. Pike. Water is the habitat of the fish.
“Ocean animals” – Only in the Global ocean, home to 40 species delfinoverde. Bottlenose dolphins are especially numerous on the Eastern shores of the United States, and the Mediterranean and Black seas. Dolphins-dolphins live in temperate and warm waters of the Pacific ocean. The shark swims along the ocean is not one. Let us talk about Guinea pigs. Abstract.
“World aquarium” – learning the verses. To expand children’s knowledge about aquarium fish and plants. Organization of trips to the pet store. Holiday “Housewarming fish”. The cartoon “finding Nemo”. The purchase of fish, plants, fodders, aquarium, necessary equipment for care. The knowledge of the underwater world through research and project activities. Continue reading
One of the brightest and most beautiful families of marine fishes, the calling card of coral reefs, has 10 genera and 130 species. In classical works of butterfly fish are often combined with fish-angels, are not inferior to them in beauty and brightness of color, with whom they have many common morphological features. Butterfly fish distributed mainly in the Indian and Pacific oceans, however they are found and the Atlantic, not only in tropical and subtropical and in temperate waters. All species found in the coastal strip, mainly inhabiting community of coral reefs and rocky outcrops. They are very conservative, do not make migrations and adhering to the same area in a lifetime. Live alone, not forming flocks and swarms. Are a daily way of life. These fish feed on various invertebrates, which are usually extracted from the crevices and other hideouts, to collect on the surface or reefs eat parasites from the skin of large fish.
Medium-sized fish, 7 to 30 centimeters, with high, strongly compressed laterally body. Rostral part of the head elongated into a tube, at the end of which is a small mouth. Dorsal fin undivided, stretches along the torso, sometimes has an extended front end, resembling a pen. Continue reading