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Shad fisheries of Maine 86 



Fisheries by water area 86 



Saco River 86 



Nonesuch River 86 



Casco Bay 88 



Kennebec River 88 



Merrymeeting Bay tributaries 88 



Sheepscot River 88 



Penobscot River and Bay 89 



Pleasant and Harrington Rivers 89 



Saint Croix River 89 



Trends in production 89 



Trends in shad production of the Atlantic coast of the United States 89 



Factors affecting decline in abundance 90 



Physical changes 91 



Dams 91 



Pollution 92 



Overfishing 92 



Natural cycles of abundance 92 



Rehabilitation and management 93 



Hatcheries 93 



Fishways 94 



Regulations 97 



Economics and marketing 97 



Recommendations 99 



Summary 100 



Acknowledgment 100 



Literature cited 101 



