The aquarium except marine fish are also produced and corals called reef marine aquarium. Fast-growing corals – usually of the genus Montipora, Acropora, Pocillopora and grow in the aquarium polyp for polyp until until grows a micro-reef.
Light for corals
The word “micro-reef” very often means just a small marine reef aquarium. Coral planting in artificial conditions requires intense lighting, which is rather expensive. Therefore, the smaller the size of aquarium, the less need for coverage, the cheaper it costs.
The need for intensive lighting because the light having the wavelength required for photosynthesis, passing through the water, fades with increasing depth. For illumination with a sufficient intensity of a small light bulb aquarium requires lower power than for lighting large. Besides that they consume less electricity they are also cheaper. Another their advantage is that they are less likely to heat the water. When the aquarium light should know that excessive light is as harmful to corals as weak.
Sea current in the aquarium
A saltwater aquarium requires water circulation. Motion credif places natural growth of coral reefs is very strong. Currents, tides provide a powerful turbulent motion of sea water, which cleanses the mucus from corals, sediments and rock fragments. At the same time it provides the coral with nutrients and oxygen. Therefore, the circulation of water in marine aquariums is essential. Unfortunately, you know it’s not all aquarists. Continue reading
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
Much worse than with the anchovy and sprats. is the case with the number of predatory fish in the Black sea. In the 1980-1990-ies completely disappeared the population of palamidi, tuna and mackerel. According to the hypothesis of the biologist Y. I. Sorokin from Noumea, on the annual migration paths of tuna and mackerel from the Marmara to the Black sea is irresistible “chemical barrier” is a giant city of Istanbul, all the waste of life in the city with a million residents flows directly into the waters of the Bosphorus. Not only Istanbul, but also all other Turkish seaside towns do not have sewage treatment facilities, resulting in pollution of the Black sea domestic and industrial wastewater.
At least 170 million people are living in all black sea countries, a tangible part of their waste of life and activity is in the Black sea.
Sewage of coastal cities, after cleaning, bring in the sea, it is harmless, even useful minerals that promote rapid plant growth. The trouble is that at the end of the twentieth century these nutrient mineral salts got into the Black sea too much, putting it on the brink of environmental catastrophe. Overfeeding marine ecosystems mineral salts is called eutrophication. The result of this, it is possible to observe on primarycontent sea of slime – filamentous unicellular green algae colonial green Alga, generously fueled by domestic sewage Anapa. The day the simplest tangle of seaweed balls almost doubled in size. In July in shallow water from Anapa to Blagoveschenskaya, grew a huge mass of seaweed balls, and reached 7500 tons! Unicellular algae kladofora prevents the growth of sea grass (eelgrass), green underwater meadows of eelgrass once covered all the sandy shallows. Balls unicellular colonial green Alga shade leaves of eelgrass, entangle and strangle its growth. The eelgrass meadow is the most beautiful underwater scenery and most lively habitat for various species of marine animals – crabs crustaceans-hermit crabs, seahorses, sea eagle, shrimp, etc. Continue reading