. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: EXPLORATIONS OF THE COAST WATERS. 311 Gulf of Maine have shown that it is usually more or less stratified. In 1913 the greater part of the plankton was condensed in the upper 100 meters or so; and while no such general rule can be laid down for 1914,because sometimes the deeper haul (Stations 10215,10246, 10248, 10254), sometimes the shallower (Stations 10214,10233,10249,) yielded. TpES"^ Fig. 92.— Plankton volume per cubic meter, July-August, 1914. 5, very rich 1 + cc. per cubic meter 4, rich . 6 + cc.
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: EXPLORATIONS OF THE COAST WATERS. 311 Gulf of Maine have shown that it is usually more or less stratified. In 1913 the greater part of the plankton was condensed in the upper 100 meters or so; and while no such general rule can be laid down for 1914,because sometimes the deeper haul (Stations 10215,10246, 10248, 10254), sometimes the shallower (Stations 10214,10233,10249,) yielded. TpES"^ Fig. 92.— Plankton volume per cubic meter, July-August, 1914. 5, very rich 1 + cc. per cubic meter 4, rich . 6 + cc. " , 3, Intermediate . 3 — . 6 cc. 1, scanty .3 — cc. the largest catch when two subsurface hauls were made at different levels, usually one was much larger than the other, as illustrated by the following table of catches in the horizontal hauls, reduced to a column 1 square meter in cross section. Duration of hauls, ^ hour. The depth is the level at which the major part of each haul was 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorha, bookcentury1900, bookdecade1910, booksubjectzoology
