Our city Odessa is located on the best sea in the world. There are living animals that can’t cause great harm, it’s just not natural cataclysms.
Lovingly the black sea washes the shores of Russia, Ukraine, Romania, Bulgaria, Turkey and Georgia. It is connected with other seas through the Bosphorus and Dardanelles and the sea of Azov – Kerch Strait.
Our sea is not too big (in the world), but that is not the last place. With a total area of 422 000 km from North to South the sea stretches for 580 km and from East to West 1150 km, the biggest depth – 2210 m, the average – 1240 m.
The length of the coast around the Black sea – 3400 km Into the sea fall into 3 major rivers: the Danube, Dniester, Dnieper.
Known than the Black sea?
First, one of its exclusive feature is the total absence of life at depths greater than 150-200 m (although there are a few anaerobic bacteria), due to the fact that at this depth the water is saturated with hydrogen sulphide. Continue reading
Some of the most popular among fans — the family Pomacentridae. This reef inhabitants of subtropical and tropical seas. Look these fish are thick and sturdy, they have a very bright color. But a real favorite of aquarists is a clown fish due to its small size and high resistance to harmful factors and diseases. It draws the family and its unusual behavior. For example, a clown fish can coexist with poisonous polyps. The reasons for this cohabitation still remains a mystery to scientists.
Clown and anemone form a symbiotic relationship. At first the fish allows itself a little sting, and then produces a protective substance and lives near poisonous
clowns in anemones
polyp without fear of predators. The clown “cares” for his Actinia, removing remnants of food, mellowing, water and even attracting other animals to food to the polyp. So anemone and clown fish provide mutual protection and benefit. The clownfish eats zooplankton and algae.
Another amazing present to view orange amphiprion. It is a bright fish in a large orange and white stripes. In one pack there is always only one breeding pair and several smaller males. They are not able to reproduce and still not clear of their role. Continue reading
Pond fish farming is the breeding of commercial fish in specially adapted or constructed for this purpose reservoirs. Farms can be full (full system) or incomplete (napolnitelem). In full system retailing the fish grow from egg stage to marketable, and in breeding — pedigree producers for full-cycle hatcheries and commercial farms.
Not in full-cycle farms planting material is grown marketable fish. They are of two types. The widest form of fish farming is feeding the carp fish farm . Spring here are imported from hatcheries to fingerling of carp weighing up to 30 grams, put them in the fattening ponds,in the fall catch of marketable fish with an average weight of from 500 to 800 grams. To grow fish in feeding the economy easy and accessible to everyone farming.
Fish farming in ponds
Carp is a widespread inhabitant of warm-water ponds. For several hundred years, farmers brought from the wild carp are some of the cultural breeds of carp that have fast growth rate and high fecundity. Widely known scaly, mirror, naked and ramcity carp, but most are bred the first two. Continue reading