summer should favor growth and survival 

 of free-swimming larvae. Decreased 

 water exchange between Passamaquoddy 

 Bay and the Bay of Fundy should favor 

 retention and settlement of larvae within 

 Passamaquoddy Bay. Consequently, there 

 may be a modest increase in the lobster 

 catch. 



Anadromous fishes 



Anadromous fishes that have present 

 or potential value in the Quoddy Region 

 include Atlantic salmon, smelt, ale wife, 

 shad, tomcod, and sea-run trout. Of these, 

 Atlantic salmon and alewives have the 

 greatest potential value but their status 

 after impoundment will depend upon the 

 efficiency and adequacy of fish-passage 

 facilities. With stream improvements, 

 particularly in the St. Croix River, the 

 total annual run of Atlantic salmon into 

 the rivers of the Quoddy Region might 

 be increased. Adequate management 

 should increase alewife production. 

 Warming of sea water and reduction in 

 tideil amplitude may favor a sport fishery 

 for trout. The smelt, shad, and tomcod 

 populations should increase under the new 

 conditions. Striped bass thrive in areas 

 where summer waters are warm and of 

 reduced salinity, but increases in their 

 abundance within the impoundment cannot 

 be predicted with any certainty. 



Other species 



Reduction in accessible beach areas 

 may result in a decrease in the present 

 small fishery for nnarine worpns in both 

 high and low pools. Supplies of rockweed 

 may be reduced somewhat in the low 

 pool, but no change is forecast for the 

 high pool or outside. Damages caused by 

 the gribble ( L imnoria) may become more 

 serious. 



ECONOMIC EFFECTS OF 

 IMPOUNDMENT 



Results of oceanographic and biological 

 studies indicate that the installation of 

 dartls will not affect the abundance of 

 herring in the Quoddy Region substan- 

 tially. Consequently, operation of her- 

 ring processors and of men engaged in 

 purse seining and the herring-carrying 

 trade will not be disturbed. However, a 

 number of weir fishermen will be af- 

 fected; some will have to relocate a few 



weirs situated on or near the site of the 

 proposed dams; others, more numerous, 

 will have to re -position weirs or alter 

 construction to suit the new oceanographic 

 environment. The average cost of weir 

 operation will likely rise. At the same 

 time, a number of weirs may gain in 

 efficiency. Groundfish and clam fisheries 

 inside the proposed dams are expected 

 to be substantially reduced. There will 

 be a drastic reduction of the clani fishery 

 in the high pool. Other species now taken 

 commercially inside the proposed dams 

 (lobsters, flounders, scallops) are ex- 

 pected to remain relatively unchanged 

 in abundance, with the possibility of 

 slight improvement. 



The primary fishing industry 



Direct damages attributable to the pro- 

 posed power project are concerned 

 chiefly with the herring fishery. Six weirs 

 near the dams will be destroyed by the 

 proposed project. The replacement value 

 of weirs, including all associated gear, 

 inside the proposed dams averages 

 $5,500. Assuming that weir Vcilues in 

 the vicinity of the dams do not differ 

 from the area average, the replacement 

 value to be considered amounts to 

 $33,000. 



Indirect damages as a result of changes 

 in environmental conditions brought about 

 by the construction of dams must be 

 given due weight in an assessment of 

 the economic effects on the weir fishery. 

 Four factors deserve examination: water 

 levels, wood borers, ice cover, and tidal 

 scour. 



On the basis of predicted oceanographic 

 changes in the high pool, weirs in this 

 area may not be operated at their present 

 locations unless they are modified and 

 altered in size to fish approximately 10 

 additional feet of water. In particular, 

 weir stakes and nets will need to be 

 larger to suit the new water levels. The 

 average value of Canadian-owned weirs, 

 including seines, in the area is about 

 $4,600, and the cost of weir construction 

 can be expected to rise by approximately 

 $1,000 after the dams are installed. 

 The average cost of annual maintenance 

 and repair might also increase by about 

 $100 per weir. In the United States 

 section of the high pool, the average 

 value of weirs is about $4,000, and the 



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