The relative growth of Cherax quadricarinatus (Von Martens, 1868) males and females under laboratory conditions was analysed using eight somatic measurements. The allometry of each measurement was estimated in relation to total length. The morphometrics were analysed using the original values, as well as normalized data from each group. Two multivariate analyses were carried out: reciprocal averaging and principal components. The results showed that the two sexes have a similar relative growth. However, differences between the sexes were recorded with respect to shape, though not to size. This was observed through the reciprocal averaging analysis after normalization of the individuals in each group. The morphometric variables that differentiated the sexes were the width and length of the chela, followed by the length of the abdomen. Thus, this analysis was useful to determine the shape differences between the sexes in culture. RESUMENSe analizó el crecimiento relativo de los machos y hembras de Cherax quadricarinatus (Von Martens, 1868) bajo condiciones de cultivo utilizando ocho medidas somáticas. Se estimó la alometría de cada medida en relación con la longitud total. El análisis morfométrico se realizó usando los valores originales de los datos, así como llevando a cabo una normalización para cada sexo. Se utilizaron dos análisis multivaridos: análisis de correspondencias y de componentes principales. Los resultados mostraron que los dos sexos poseen crecimiento relativo similar. Sin embargo, se observaron diferencias entre los sexos con respecto a la forma de la quela y la longitud del abdomen. Así, este análisis fue útil para identificar diferencias entre la forma de los sexos en organismos sometidos a cultivo.) Corresponding