Study of growth characteristics of male and female Australian red-claw crayfish Cherax quadricarinatus (von Martens, 1868) when introducing bacteriocin into their diet

The paper presents data on the results of studying the effect of nisin on the growth and survival of female and male Australian red-claw crayfish Cherax quadricarinatus. The experiment was conducted in closed water supply systems on individuals with clearly expressed signs of sexual dimorphism and divided into control and experimental groups. Nisin, a representative of the class of lantibiotics type A, was added to the diet of the experimental groups in an amount of 0.1 %. The duration of the experiment was 30 days. As a result, an improvement in growth indicators was recorded: the average weight of females in the experimental group increased by 33.6 %, males – by 26.1 % compared to the control group. Survival also increased to 86.7 % for females and 83.3 % for males against 56.7 % and 76.7 %, respectively, in the control groups. The data obtained are of practical value for the development of environmentally friendly technologies in industrial crustacean breeding.