The miner dives to the bottom of the stream and uses a hose to suck up gravel and sediment. Suction dredge mining is a form of recreational gold mining that utilizes a high-powered floating vacuum. In response to that story, we’ve received a number of questions asking what dredge mining is, if it’s legal in Idaho, and why ICL cares about it. Our results have significant conservation implications and emphasize the need for additional research.Suction dredge mining has been in the news lately, with a federal judge in Idaho recently levying a record $150,000 fine against an out-of-state miner who refused to follow rules that protect the South Fork Clearwater River and the sensitive, threatened, and endangered fish that live there. However, burial by dredge tailings resulted in the death of a substantial percentage of mussels of each species and no mussels were able to excavate from experimental dredge tailings. All exposed mussels survived the 6-week experiment. No obvious physical damage to mussels was observed due to entrainment by the suction dredge and entrainment had no effect on the survival of mussels. The secondary experimental treatments were exposure and burial. The primary experimental treatments were entrainment by a suction dredge versus non-entrainment. We quantified the effects of being entrained, exposed, and/or buried by suction dredge placer mining on the short-term survival of western ridged mussels ( Gonidea angulata, Lea) and western pearlshell mussels ( Margaritifera falcata, Gould) in the Similkameen River, Washington. Suction dredge placer mining is an increasingly frequent activity that may affect the survival of mussels, however, the effect of suction dredge mining on freshwater mussels has received little attention. Monofilament recovery and recycling program.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |