Effects of Three Commercial Harvesting Methods On Mussel Beds

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(3) Of the culled mussels, how many are damaged, and how many are able to burrow back into the bottom?
The three harvest methods we investigated were diving with compressed air, the basket dredge, and the mussel brail. When our research began in 1979, many biologists and conservation agents felt that Illinois regulations should be amended to allow diving and that differences between hand dredges, which were legal, and basket dredges, which were not, needed to be clarified. This would make Illin
...ois regulations more consistent with Missouri and Iowa, which control the side of the Upper Mississippi River opposite Illinois. The rationale for the proposed change was that the basket dredge was a nonselective, destructive harvesting technique, while commercial divers were highly selective and did not harm nontarget mussels.
16 but there were no data to support this rationale. The mussel brail is probably the most commonly used harvesting gear and is also a favorite sampling technique for biologists.


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