О КОРОТКОЦИКЛОВЫХ ФОРМАХ РЫБ В БАССЕЙНЕ СРЕДНЕЙ КАМЫ

As is known to the Kama area is described in detail the short cycle form of European grayling. In addition, recently studied some populations of short cycle forms roach. Description of the short form is given in this paper. Collection roach carried out in the Suksun pond of the Perm region. The material was fixed in 4% formalin solution and processed in the laboratory at the Department of zoology and ecology PSU. Plastic signs were measured with calipers, with an accuracy of 0,1 mm. The mass was measured on an electronic balance with an accuracy of 0.1 g. The mass of the gonads were determined using electronic scales with an accuracy of 0.001 g. Age determination was conducted on the scales using a binocular microscope MBS-10 with an increase of 8 x 4. In females with well-developed cities (3-4 maturity stage) counted fertility. For the first time indicates when the formation and existence of short cycle forms bream, perch, bleak and burbot. For short cycle forms grayling and roach most characteristic decrease in life expectancy, early ripening, very low fertility (2333 pcs). Rather, these figures are inherent and others marked fish species. However, their parameters are insufficiently investigated. It is to monitor the poorly studied species of fish in these waters (Suksunsky, Nytvensky, Lysvensky ponds, r. Brodovaja et al.).