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Index of Subjects I haven't been able to follow this issue as closely as it deserves, so I appreciate the submissions from Nelson Poirier and Fred Schueler. We should definitely care for the 'fishes' before 'trucks and cars'; it would seem logical. There is nearly always a way to do both if we care enough. Yes? Donna Crossland On 2020-03-18 12:17 p.m., Fred Schueler wrote: > On 3/18/2020 6:48 AM, Nelson Poirier wrote: > >> This note is directed to folks who may be concerned about the Avon >> River Causeway in Windsor. I lived in that area when the Avon River >> flowed freely. It is been sad for me to see what has happened this >> river with the erection of a causeway that reduced it to be >> unrecognizable to the way Mother Nature designed. > >> A very similar scenario has taken place with the Petitcodiac River in >> Moncton, New Brunswick with a well-intentioned causeway built in 1968 >> with fishway and adjustable gates to let the river flow. The huge >> Fundy tides deposited silt that turned it into a barrier choking off >> the river > > * ...resulting in the extinction of the one Canadian population of a > rare Unionid mussel, Alasmidonta heterodon, the Dwarf Wedge Mussel, > because its anadromous host fish couldn't get past the causeway - > https://www.canada.ca/en/environment-climate-change/services/species-risk-public-registry/cosewic-assessments-status-reports/dwarf-wedgemussel-appraisal-summary-2009.html > >> It took 42 years to get the causeway gates opened and now 52 years >> later a bridge is to be completed within the year to let the river >> flow free again replacing the causeway. > > * ...but not allowing Alasmidonta heterodon to come back, because the > nearest surviving population is somewhere in southern Maine. The Avon > River Causeway should be forbidden not just for the harm it will do to > the Avon River's Salmon and other species, but as a memorial to the > loss of the Dwarf Wedge Mussel from Canada. > > fred. > ------------------------------------------------------------ > Frederick W. Schueler & Aleta Karstad > Fragile Inheritance Natural History > 'Wildlife on Roads' - > http://doingnaturalhistory.blogspot.ca/2018/03/upcoming-book-wildlife-on-roads-handbook.html > 'Daily' Paintings - http://karstaddailypaintings.blogspot.com/ > 4 St-Lawrence Street Bishops Mills, RR#2 Oxford Station, Ontario K0G 1T0 > on the Smiths Falls Limestone Plain 44.87156° N 75.70095° W > (613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/ > ------------------------------------------------------------ > "Feasting on Conolophus to the conclusion of consanguinity" > - > http://www.lulu.com/shop/frederick-w-schueler/feasting-on-conolophus-to-the-conclusion-of-consanguinity-a-collection-of-darwinian-verses/paperback/product-23517445.html > ------------------------------------------------------------ -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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