. The Biological bulletin. Biology; Zoology; Marine biology. 190 R. G. STROSS AND J. C. HILL TOTAL HATCH (%) -• Figure 8. Cumulative hatch of Daphnia embryos suspended in transparent (white bars) and opaque (black bars) containers at various depths in Paul Lake, Michigan. One series of containers (S) was retrieved 3 days after the other (N). The temperature profile is thought to reveal the extent of wind-driven recirculation, which is incomplete in the lake during the overturn period in Spring. Also shown is the attenuation of white and violet
. The Biological bulletin. Biology; Zoology; Marine biology. 190 R. G. STROSS AND J. C. HILL TOTAL HATCH (%) -• Figure 8. Cumulative hatch of Daphnia embryos suspended in transparent (white bars) and opaque (black bars) containers at various depths in Paul Lake, Michigan. One series of containers (S) was retrieved 3 days after the other (N). The temperature profile is thought to reveal the extent of wind-driven recirculation, which is incomplete in the lake during the overturn period in Spring. Also shown is the attenuation of white and violet (405 nm) light with depth. The containers were placed in position in November of the year preceding. 1966). In the experiment the embryos were exposed in addition to a long-day photoperiod (L:D 16:8), to a combination of high (20°) and low (°) tempera- ture, a five-minute immersion in a solution of sodium hypochlorite (), and were incubated in both water from the lake and a synthetic medium (Table IV). Only the embryos exposed to hypochlorite and incubated at the higher tempera- ture in the synthetic medium under light responded in appreciable numbers. Whether or not the synthetic medium is effective without preliminary treatment of the embryos with hypochlorite was not 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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