Techniques for enhancing larval settlement of the abalone, <i>Haliotis iris</i> , on artificial surfaces

Abstract

The number of Haliotis iris larvae that settle on an artificial surface can be increased by lengthening the natural conditioning period of the surface. Gamma‐aminobutyric, acid (GABA) used without exclusion of bacteria, hastened but did not significantly improve the settlement of the larvae or numbers of post‐larvae. The results are discussed in relation to hatchery production of juvenile abalone.