NOTES AND NEWS FOULING OF TOWED SEISMIC STREAMERS OFF CENTRAL AFRICA BY THE LEPADOMORPH BARNACLE CONCHODERMA VIRGATUM BY DONALD E. HARPER, JR. Texas A & M Marine Lab., 5007 Avenue U, Galveston, Texas 77551, U.S.A. In late 1993, I received a report that seismic streamer cables being towed by a Western Geophysical vessel (fig. 1) had experienced heavy fouling by barna- cles. Specimens of the barnacles were obtained and identified as Conchoderma virgatum (Spengler, 1790), a lepadomorph that is cosmopolitan in tropical and temperate waters. C. virgatum has been found attached to living organisms (fish, parasites of fish, whales, sea turtles, sea snakes, and crabs), and inanimate objects (ships, buoys, telephone cables, and oil platforms) (Hastings, 1972), but no record has been found of attachment to towed seismic streamers. The M/V "Western Regent" operating off central Africa, experienced such heavy fouling of its streamers that operations had to be suspended for six days while the barnacles were removed. The streamers had been in the water about four weeks, between 11 October and 4 November, 1993. The vessel was operating at about 4° E and 4° N, at speeds of 5.5-9 km/hr. The streamers were submerged to a depth
Crustaceana – Brill
Published: Jan 1, 1995
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