Four of the most abundant benthic polychaetes of Biscayne Bay, Florida, contained ripe gametes throughout one year of observations. They are Lumbrineris impatiens, Leanira grubei, Owenia fusiformis, and Chaetopterus variopedatus. The absence of recurring seasonal cycles
of abundance of the benthic polychaetes, shown in earlier quantitative work, is interpreted to be the result of steady year-round recruitment of young.
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