INVESTIGATION OF LENGTH-WEIGHT RELATIONSHIP AND CONDITION FACTOR OF Carassius gibelio RELATED TO WATER QUALITY IN PANTELIMON II LAKE.

Length-weight relationship, Fulton's K condition factor and the size structure were assessed for unsexed cyprinid gibel carp, Carassius gibelio (Bloch, 1782) (N= 100) caught from Pantelimon II Lake area - a man-made lake from Colentina River. Negative allometric growth was estimated for gibel carp in both seasons: TW = 0.0396 x TL^2.7583 (N=50, November 2016) and TW = 0.0269 x TL^2.8639 (N=50, May 2017). Condition factor K registered values between 1.44 and 2.38 (cold season), 1.49 and 3.79 (warm season). The physico-chemical parameters such as pH, electrical conductivity, total dissolved solids, total hardness, chemical oxygen demand, ammonium nitrogen, nitrite-nitrogen, nitrate nitrogen and phosphorus-phosphate were determined, in order to evaluate the impact of abiotic environmental conditions on fish population. The microbiological examination of water quality was also carried out, to detect the micromycetes which may pose health risk to both human and fish. The presence of Penicillium spp. and some yeast strains were confirmed in water samples from the studied area. According to all analyzed parameters, the water resource was found to be within the suitable range for well-being of C. gibelio, which is important assuming that local fishermen often catch and eat gibel carp. To our knowledge, this paper provides first information on length-weight relationship, Fulton's K condition factor and the size structure of Carassius gibelio from Pantelimon II Lake. [ABSTRACT FROM AUTHOR]