Three closed systems were evaluated for the transport of abalone larvae for use in remote settlement associated with mass culture activities. The first of these systems maintained the larvae in seawater, the second in seawater with oxygen added, and the third in wet condition without seawater but with oxygen added. Survival of the larvae was determined within each system over periods of 10, 16, and 36 h. In a separate experiment, larval settlement in aquaria was determined after holding the larvae in the three different transport systems for 10 h. The results showed the best survival was obtained for the larvae in water alone, with survival rates ranging from 97% at 10 h to 63% at 36 h. In the system without water these rates were 88–50% respectively. The use of oxygen in the transport systems only produced a positive effect at 36 h. Larval settlement after 10 h showed no significant differences in relation to transport system, from 60% settlement of larvae transported in water to 54% settlement of larvae in the wet condition, not suspended water.
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Vol. 26 • No. 3