D-larvae were cultured in a 300-l cylindro-conical tank at an initial
density of 3–8 ind. ml−1. Larvae developed into pediveligers after
18–20 d and were settled in a circular tray (D: 36 cm; area: 1018 cm2;
bottom mesh size: 200–240 μm) which floated on the water surface of
the tank. Due to difficulty in rearing larvae at an early stage of the
research, one batch of pediveligers was brought directly from a commercial
hatchery (Island Scallops Ltd., Qualicum Beach, BC, Canada)
for settlement. Juveniles were cultured at densities of b30 ind. cm−2
before they reached the size for various experiments (i.e. 1–1.6 mm
mean shell length).