Spawning Aggregation of Beardfish, Polymixia lowei, in a Deep-water Sinkhole off the Florida Keys
Coastal Sciences, Gulf Coast Research Laboratory
A large spawning aggregation of Polymixia lowei, Beardfish, was documented via video and specimen collection in a deep-water (413 m) sinkhole off Key West, Florida on 5 June 2007. The use of the human-occupied submersible, Johnson-Sea-Link It, allowed for in situ observations, video documentation, and specimen collection. The maximum density (1117 fish m(-2)), average abundance (56 fish m(-2)), and average standard length (152.1 mm) were estimated from video transects. Ovarian histology of the fish collected indicated recent spawning activity. Observations of a deep scattering layer above the sinkhole by echo sounder suggested that A towel were in the water column during the pre-dawn hours. This represents the first report of aggregating behavior for reproduction in A towel.
Baumberger, R. E.,
Brown-Peterson, N. J.,
Reed, J. K.,
Gilmore, R. G.
(2010). Spawning Aggregation of Beardfish, Polymixia lowei, in a Deep-water Sinkhole off the Florida Keys. Copeia(1), 41-46.
Available at: http://aquila.usm.edu/fac_pubs/708