Every year commercial fish species is becoming less. Scientists warn that may soon Ukrainians can not take grandkids fishing — will catch nothing.
“Back in the thirties dried up stoked the stove”
— In recent years we have almost completely destroyed river ecosystem, — says Sergey Mezhzherin, doctor of biological Sciences, Professor Institute of Zoology. I. Schmalhausen. — In Ukraine there is a huge estuary — the sea of Azov, which was considered the most cost-effective and highly productive ecosystem. Here the fish bred naturally. About how much it was in Azov sea, says a historical example: in the area due to the lack of firewood up to the thirties of last century the house was heated by dried specimens, casting them into the furnace instead of logs. Now it seems incredible, however, the number of freshwater fish in the country (even compared to the seventies of the past century) has decreased at least thirty times. Peregorazhivanie dams of the Dnieper, Kuban, don, led to a sharp saloneni water. Now we can confidently talk about a real environmental disaster and in fact of mass death of fish in the rivers of our country.
“Every year in Ukraine disappear two rivers”
Another reason for the lack of fish in Ukraine: loss of grasslands and floodplains — the most scarce of the environment and natural resources in our territory. In addition, in recent years disappear… the river. For example, on the Kiev — Odessa highway signs with the names of small waterways exist, but they are not. They are either overgrown with weeds or completely gone underground. Continue reading
Great importance in the successful maintenance of marine aquarium has a competent selection of equipment. It shall conform to the dimensions of the sump and the aquarium. to be sufficient capacity and reliable. In this article I want to address briefly each device, so you have a rough idea about the equipment.
In your aquarium you should provide a good turbulent flow, the lighting that you need for aquariums with marine fish and reef systems, heating and possibly cooling water. That is, the “Three pillars” of the marine aquarium – flow, lighting and temperature. But how to clean the water from the detritus and waste of invertebrates and fish? Here, fortunately, there are completely different approaches, ranging from simple weekly water changes, to complex systems, the whole complex biological and chemical water purification. Let’s look at each element separately.
Such fire in the ocean, melkoporistye (SPS) corals in nature live in strong currents, fighting for space is no joke, and many corals and animals are used to living in places with extremely strong water circulation. As a reward for brings them plankton and different food particles. Others cannot tolerate even moderate force, and not fully expanded, discosoma and ricordea belong to this group. Continue reading