. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 20" - 80° 70° 60* 50*W FIGURE 25. Surface temperatures in June. (Mod. from Fuglister, 1947.) will tend to be forced down into deeper and colder water. Alternatively, if the cold water is near the surface, it may be kept up at a level where the illumination is too high. It may thus be impossible for the animal to find a level where both tem- perature and illumination are within the tolerance range of the species, and the area must therefore be considered unsuitable for it. In an attempt to express the combined effect of
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 20" - 80° 70° 60* 50*W FIGURE 25. Surface temperatures in June. (Mod. from Fuglister, 1947.) will tend to be forced down into deeper and colder water. Alternatively, if the cold water is near the surface, it may be kept up at a level where the illumination is too high. It may thus be impossible for the animal to find a level where both tem- perature and illumination are within the tolerance range of the species, and the area must therefore be considered unsuitable for it. In an attempt to express the combined effect of these two factors, we have made use of the illumination at mid- day, in summer, at the depth of the 16° C. isotherm. This isotherm was chosen. 30 25° isotherm I0~'° illuminotion 20" - 60° W FIGURE 26. Observed distribution of E. brci'(s, and proposed temperature and illumination 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
