By National Research Council, Division on Earth and Life Studies, Ocean Studies Board, Board on Environmental Studies and Toxicology, Committee on Atlantic Salmon in Maine
Due to the pervasive and immense decline of Atlantic salmon populations in Maine over the last one hundred fifty years, and since they're with regards to extinction, a finished statewide motion will be taken now to make sure their survival. The populations of Atlantic salmon have declined tremendously, from an anticipated part million grownup salmon returning to U.S. rivers every year within the early 1800s to maybe as few as 1,000 in 2001. The document recommends enforcing a formalized decision-making method of identify priorities, overview recommendations and coordinate plans for holding and restoring the salmon.
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There is an urgent need to understand the relative efficiency of stocking of different life stages in the rivers in terms of adult returns per brood-stock fish and their reproductive success. Additional research on hatcheries and scientific guidance for their use is needed, because hatchery-based restoration of wild salmon populations remains an unproven technology. The committee was asked to provide estimates of the approximate relative costs of the various options. Although it has not been able to provide detailed cost estimates for all of its recommendation, it does estimate that dam removal would cost between $300,000 and $15 million per year; and liming would cost on the order of $100,000 per stream initially plus $50,000–$100,000 per year.
Urgently Needed Actions There is an urgent need to reverse the decline of salmon populations in Maine if they are to be saved. Other than the Penobscot River, only 80 adult salmon were recorded to have returned to Maine’s rivers in 2002. The serious depletion of salmon populations in Maine underscores the need to expand rehabilitation efforts to as many of Maine’s rivers as possible. Since most Maine salmon are now in the Penobscot River, that population should be a primary focus for rehabilitating the species in Maine.
The eight DPS rivers in Maine with Atlantic salmon listed as endangered under the ESA are (5) Dennys, (6) East Machias, (7) Machias, (8) Pleasant, (9) Narraguagus, (12a) Cove Brook, (13) Ducktrap, and (14) Sheepscot. SOURCE: Baum et al. 2002. Reprinted with permission of the author. 3 SUMMARY BOX S-1 Committee Statement of Task A multidisciplinary committee will review the available scientific information on the status of Atlantic salmon populations in Maine and, where relevant, in adjacent areas.
Atlantic Salmon in Maine by National Research Council, Division on Earth and Life Studies, Ocean Studies Board, Board on Environmental Studies and Toxicology, Committee on Atlantic Salmon in Maine