id author title date pages extension mime words sentences flesch summary cache txt 43177 Coker, R. E. (Robert Ervin) The Protection of Fresh-Water Mussels .txt text/plain 9983 447 63 possible to insure the best condition of the mussel beds, except by dealing with the natural history of mussels, the shell and pearl (1) The imposition of size limits for the protection of young mussels. the mussel fishery during a portion of the year is either to protect considerable number of species of economic mussels. shells, depleting the mussel beds at twice the necessary rate without found that 60 per cent by number of the shells taken were of a size working of a 2-inch size limit, 60 shells out of every 100 then being In planning for the closing of portions of rivers for periods of years should be closed to the mussel fishery for a period of years. should be closed to the mussel fishery for a period of years. mussels or shells held in violation of the law. the taking of mussels of any size or in any region for ./cache/43177.txt ./txt/43177.txt