Dear List:
Earlier this spring, a commercial fisherman on the lower Mississippi River mentioned that he had collected some sturgeons (around 20-24 inches TL) in his nets. These fish had "rubber bands" wrapped around their body which was cutting into the gills and skin behind the dorsal fin. He thought that someone was haphazardly stocking them thinking the rubber band would break off in time. After a brief check, I couldn't locate anyone stocking sturgeon in the vicinity (although I couldn't figure why stocked fish would have a rubber band on them either). I also considered that they could be a part of someone's tagging study.
Last week, we too collected a shovelnose sturgeon from a floodplain lake upstream of Vicksburg, MS with a rubber band wrapped as described above. Another biologist said he had observed the same thing 10 years ago also on the Miss. River. Thus, it must be a fairly common occurrence.
If this is not related to stocking or some type of unpublicized tagging study, how is this occurring naturally? Are these fish be swimming through rubber bands laying on the river bottom (as juveniles?) or is it some other mechanism altogether. If anyone out there has had similar experiences, I'd like to hear from them.
Thanks in advance.
Mike Eggleton Mississippi State University
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