CONTENTS 



Page 



Introduction 1 



Life history 2 



Range and distribution 2 



Spawning , 2 



Larval and juvenile development 2 



Growth 3 



Growing areas 3 



The scallop fishery 3 



History of connmercial activity 3 



Composition of catch 5 



Comparison with other areas 6 



Expected changes 7 



Oceanographic effects 7 



Effects of changes on sea scallops 7 



Sum ma ry 8 



Literature cited 8 



FIGURES 



1. Chart of the Quoddy Region showing location of proposed 



dams iv 



2. Approximately the smallest (4.5 mm.) and the largest (9.6 mm.) 



juvenile scallops found attached by byssus to adult scallops 



(Baird, 1953) 2 



3. Chart showing distribution of scallop-growing areas in the 



Quoddy Re gi on 4 



4. Scallops tagged with plastic disks, a portion of nearly 2,000 



similarly marked between December 1949 and June 1951 in 



a migration study 6 



5. Size distribution of scallops in the commercial fishery 7 



TABLES 



1. Annual sea scallop landings in the Quoddy Region, Washington 



County, and State of Maine, 1948-57 2 



2. Average age-length of Maine sea scallops 3 



3. Landings of sea scallops and nunnber of licensed local sea 



scallop boats in Quoddy Region, 1948-57 5 



4. Comparative size distributions of sea scallops in Passama- 



quoddy and Penobscot Bays 5 



5. Age and size distribution of sea scallops in Passamaquoddy 



Bay 6 



6. Annual Quoddy Region sea scallop landings at present (10-year 



mean) and as predicted after dam construction 8 



iii 



