Analysis of the effect of extruded foods on the african catfish (clarias gariepinus) produced in the lithuanian company on growth intensity, feed conversion and meat quality

Objective: To investigate the influence of extruded feeds on African catfish (Clarias Gariepinus) produced in the Lithuanian company on growth intensity, feed conversion, meat quality and morphological composition of blood. Work tasks: 1. To determine the intensity of growth of the investigated and control fish groups, the conversion of the feed, the physical-chemical properties of the meat, calculate and compare the indices of the anatomical parts. 2. Determine the influence of feed on the morphological composition of blood of African catfish. Results obtained: The efficiency of the experimental group for the growth rate of African catfishes was 18,87 % worse during the entire growing period. The feed conversion of the test group was 32,70 % worse (respectively 1,193 and 0,899). According to head size, head mass and torso indices, the fish in the study group were more cultured from the culinary point of view. The meat of the test group was worse due to its colorfulness, since its redness was 1,53 % lower. According to boiling distances, the meat of the test group was 4,24 % better, according to water content and water consistency of 0,33 % and 3,00 % worse than the control group's fish. Meat of the test group was 0,93 % proteinaceous and 0,92 % fatter than the control group. According to fatty acids, fish fats of the test group were more valuable because they contained 1,87 % more polyunsaturated fatty acids and 0,83 % more monounsaturated fatty acids, and the amount of saturated fatty acids harmful to human health was 2,71 % lower. According to morphological composition of the blood, the data of the study group were better for all parameters under study: hematocrit per cent. 31,91 and 25,43 (control group), respectively hemoglobin 99,73 and 90,00 g/l, red blood cells – 2,33 and 2,15x1012 g/l, and white blood cells 6.10 and 5.62x109 l. Blood density of both groups was equal - 1.03