Artificial collectors deployed in May and early June obtained higher numbers of Aequipecten opercularis spat than when collectors were deployed in late June and July in both 2007 and 2008. Different recruitment patterns were found in the 2 y studied. Four successive cohorts settled in both 2007 and 2008; however, in 2007 the 4 cohorts settled over short periods of time, whereas in 2008 a single cohort settled for an extended period of time and produced most of the spat of the year. The effectiveness of collectors for spat settlement decreased after 2 mo. Spat showed a fast growth rate that was density dependent. In general, the survival rate was high, mainly because there were very few predators.
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Vol. 29 • No. 4