. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 84 RICHARD E. LEE Quantitative studies of the invertebrate marine bottom fauna in flounder fishing grounds have been made by several European investigators. The work of Petersen (1911, 1915, 1918), Jensen (1919), Blegvad (1914, 1925), and others in the Dan- ish fishing grounds is well known. Davis (1923, 1925) has made several quantita- tive studies of the bottom fauna in the deep water fishing areas of the North Sea, while Idelson (1930) has carried out comparable investigations on the Spitzbergen. CHART 1. Map of Vineyard
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 84 RICHARD E. LEE Quantitative studies of the invertebrate marine bottom fauna in flounder fishing grounds have been made by several European investigators. The work of Petersen (1911, 1915, 1918), Jensen (1919), Blegvad (1914, 1925), and others in the Dan- ish fishing grounds is well known. Davis (1923, 1925) has made several quantita- tive studies of the bottom fauna in the deep water fishing areas of the North Sea, while Idelson (1930) has carried out comparable investigations on the Spitzbergen. CHART 1. Map of Vineyard Sound and the adjacent islands. Menemsha Bight is the area enclosed by a heavy black line on the western end of Martha's Vineyard. Banks. In the western hemisphere, however, the extensive quantitative studies of marine bottom fauna have been restricted chiefly to the Pacific coastal regions (Shelford and Towler, 1925; Shelford, Weese, ci al. 1935; Weese and MacNab, 1930) while the several investigations of bottom animals along the Atlantic coast- line have been largely of a qualitative nature. METHODS Apparatus Many previous investigators have found that the Petersen dredge (Petersen, 1911) was the most satisfactory bottom sampler devised to date for the purposes of their work. Preliminary trials of this instrument on sand, mud, gravel, and stony bottoms in Vineyard Sound, however, reveal that this dredge is highly unsatisfac- tory for quantitative sampling in this region, for it is relatively small and due to its lack of weight the jaws of the bucket frequently fail to penetrate the bottom deeply enough to obtain a sample or to capture other than organisms living upon the sur- face of the bottom. For these reasons, a larger and heavier dredge of the so-called "clam shell" design was purchased from the Hayward Company of New York. This instrument, made of special rust-resistant steel, weighs over 300 pounds when empty and covers a section of the bottom 101 X 56 cms. i
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
