Sterol requirement of cultured juvenile crayfish, Pacifastacus leniusculus

Changes in the sterol composition of an extruded diet revealed that juvenile Pacifastacus leniusculus requires at least 0.4% (dry weight) of dietary sterols for survival. A mixture of plant-derived sterols (phytosterols) is as effective as an equal amount of cholesterol in the partial satisfaction of the requirement. The experimental diet is composed primarily of unrefined feedstuffs and has been used in the intensive raceway culture of juvenile...