Atlantic Salmon in Maine (2004) / Chapter Skim
Currently Skimming:
6 Findings and Recommendations
6 Findings and Recommendations
Pages 188-194
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From page 188... ...
The evidence suggests that regional climate change in Maine -- mainly winter warming -- has increased the difficulties encountered by salmon populations. Climate change, along with probably associated changes in oceanic conditions, appears to be an important factor affecting salmon, and it cannot be directly influenced by human intervention over the short and medium terms.
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From page 189... ...
Elsewhere, aquaculture has been shown to affect native salmon populations through ecological competition from escaped farm fish and through a large increase in the population density of parasitic copepods (sea lice)
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From page 190... ...
Other than the possible adverse effects of salmon farms and fishing, the factors involved, such as predation, competition, and adverse water temperatures, are not well understood and do not appear to be accessible to human control, at least for the short or medium terms. The use of deep groundwater wells and storage ponds to irrigate agricultural crops (principally blueberries)
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From page 191... ...
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.
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From page 192... ...
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.
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From page 193... ...
· The Maine Atlantic Salmon Commission should consider shaping governance structures so that they are consistent with salmon biology. That could involve developing multistakeholder governance institutions for each drainage basin, each nested within larger-scale governance bodies to address effects, such as climate change and aquaculture, that are larger than individual basins.
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From page 194... ...
The energy and commitment of the members of many local watershed and river-specific groups focused on restoring salmon and their habitats is an important asset and should be included in any overall approach to rehabilitating Atlantic salmon and their habitats in Maine.
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