productivity

The intensive method of fish farming

An important reserve in increasing fish productivity is the introduction of fish culture in the practice of the method of joint cultivation of fishes of several kinds . that most fully use feed resources of the reservoir. Practice confirms the possibility of growing in a variety of combinations that reduce competition for food fish such as carp, carp, white and variegated silver carp, white Amur, etc.

Silver carp . With the introduction into farms of joint cultivation of fishes of the composition of the productivity of fish in ponds is 20 – 30 kg/ha water area. When grown with carp and herbivorous fish in pond farms of the southern areas by herbivorous fish receive an additional fish for at least 6 – 10 t/ ha, in ponds in the forest-steppe up to 3 – 5 kg/ha.

The silver carp eats all types of algae that occur in fresh water. Its power is supplied by filtering phytoplankton through a kind of arranged Gill apparatus. In Biotechnics of artificial breeding using the method of pituitary injections, where to produce offspring using the pituitary glands of fish / kg females. The ripening females after hypophyseal injections depends on the temperature conditions in the spawning basins. When ripe, the prevailing temperature of 21 – 26 degrees Celsius. Continue reading

Freshwater fish
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Aquarium fish: How to choose and contain?
Have you tried to meditate? Not necessarily so, as do the followers of Eastern practices. Meditate on the fire, the water, the sounds of the forest and... aquarium fish! Experienced…

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Marine aquarium
This article is about the tank for keeping aquatic organisms. Aquarium (lat. aquarium ) — artificially formed aquatic habitats in a transparent tank designed for the maintenance of organisms-hydrobionts (animals…

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