. Commercial fisheries review. Fisheries; Fish trade. Fig. 1 - Locations off northeastern coast of United States where photographs of sea bottom were made. Open circles denote sites of single photographs; solid dots denote multi-photograph stations. The quantity and value of sea scallop and surf clam landings have increased markedly since World War 11. The value of both spe- cies has increased five-fold during a 20-year period. Ocean quahog landings, on the other hand, diminished in quantity and total value because of reduced consumer demand, GEOGRAPHIC DISTRIBUTION The geographic distribution
. Commercial fisheries review. Fisheries; Fish trade. Fig. 1 - Locations off northeastern coast of United States where photographs of sea bottom were made. Open circles denote sites of single photographs; solid dots denote multi-photograph stations. The quantity and value of sea scallop and surf clam landings have increased markedly since World War 11. The value of both spe- cies has increased five-fold during a 20-year period. Ocean quahog landings, on the other hand, diminished in quantity and total value because of reduced consumer demand, GEOGRAPHIC DISTRIBUTION The geographic distributions of sea scal- lops, surf clams, and ocean quahogs along the northeastern coast of the United States are illustrated in figures 2, 3, and 4, respective- ly. These charts are based on literature re- ports, fishery data, and experimental dredg- ings. All sources agree in showing that these shellfish are restricted to the continental shelf, and that their areal distributions have considerable overlap. Sea scallops have been exploited throughout most of their known dis- tribution area, but surf clams and ocean qua- hogs are fished only locally. Included on each distribution chart are sta- tion marks that indicate the locations where the specimens, either living or dead, were detected in photographs of the sea bottom. The charts reveal that, with few exceptions, the records of occurrence from sea-bottom photographs fall within distributions derived from catch records and other Fig. 2 - Thegeographicdistributionofseascallopsoffnortheastem coastof United States. Crosshatching marks area where sea scallops have been collected. Circles and dots show locations where sea- floor photographs revealed live sea scallops or their Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. National Mari
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Keywords: ., book, bookcentury1900, booksubjectfisheries, booksubjectfishtrade
