Bubbles in live-stranded dolphins
Moore, Michael J.
Moore, Kathleen M. T.
Sharp, Sarah M.
Harry, Charles T.
Hoppe, Jane M.
Niemeyer, Misty E.
Lentell, Betty J.
Wells, Randall S.
MetadataShow full item record
Bubbles in supersaturated tissues and blood occur in beaked whales stranded near sonar exercises, and post-mortem in dolphins bycaught at depth and then hauled to the surface. To evaluate live dolphins for bubbles, liver, kidneys, eyes and blubber–muscle interface of live-stranded and capture-release dolphins were scanned with B-mode ultrasound. Gas was identified in kidneys of 21 of 22 live-stranded dolphins and in the hepatic portal vasculature of 2 of 22. Nine then died or were euthanized and bubble presence corroborated by computer tomography and necropsy, 13 were released of which all but two did not re-strand. Bubbles were not detected in 20 live wild dolphins examined during health assessments in shallow water. Off-gassing of supersaturated blood and tissues was the most probable origin for the gas bubbles. In contrast to marine mammals repeatedly diving in the wild, stranded animals are unable to recompress by diving, and thus may retain bubbles. Since the majority of beached dolphins released did not re-strand it also suggests that minor bubble formation is tolerated and will not lead to clinically significant decompression sickness.
© The Author(s), 2011. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Proceedings of the Royal Society B : Biological Sciences 279 (2012): 1396-1404, doi:10.1098/rspb.2011.1754.
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Ketten, Darlene R. (Woods Hole Oceanographic Institution, 2005-11)Necropsy and histologic findings for examinations performed on beaked whales stranding between October, 1999 and June, 2002 are summarized and the finding interpreted. They are presented in chronological order of exams ...
Ketten, Darlene R.; Montie, Eric W. (Woods Hole Oceanographic Institution, 2008-01)This section provides an introduction to biomedical imaging techniques and guidelines for diagnostic imaging of marine mammals to assist with both live examination and necropsy procedures. The procedures described are ...
Pugliares, Katie R.; Bogomolni, Andrea L.; Touhey, Kathleen M.; Herzig, Sarah M.; Harry, Charles T.; Moore, Michael J. (Woods Hole Oceanographic Institution, 2007-09)This necropsy manual is designed to establish a base level of profiency in marine mammal necropsy techniques. It is written for stranding network members who do not have a formal pathobiological training and have limited ...