Biological Survey Along the St. Lawrence River for the St. Lawrence Seaway. Additional Locks and other Navigation Improvements Study

摘要

Biological surveys were conducted between May-November 1979. Samples of benthic invertebrates were collected on the St. Lawrence River from May through October, 1979. Oligochaeta, Chironomidae, and Amphipoda were the dominant taxa by frequency and abundance. Molluscs, particularly Unionidae and Hydrobiidae, dominated the standing crop biomass. Depth substrate, location and season played major roles in the benthic community. Five sites in the lower Grasse River were sampled in May-November 1979 for fish populations by using trap nets, while six sites were sampled with seines. A total of 35 species of fish were captured. The most abundant species were spottail shiner, golden shiner, logperch and bluegill. Bird studies were conducted along the international section of the St. Lawrence River from June through November, 1979. Mammals were sampled with a variety of live traps during the summer of 1979. Tracking was done during the winter. Of the 37 species believed to occur in the vicinity of Massena, 18 are considered common, 5 common to rare, 11 rare, and 3 seasonal. Amphibians and reptiles were sampled with a variety of traps and observed in other ways such as turning over logs, sifting through debris, and listening to mating calls.