. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NOTROPIS HYBOPSIS AMBLOPLITES CALOPTERYX CAMPFLOMA MACROMIA ANOOONTOIDES SPHAERIUM 0 10 20 30 40 50 60 70 80 90 1QQ. NOTROPIS HYBOPSIS AMBLOPLITES CALOPTERYX CAMPELOMA MACROMIA ANODONTOIDES ' SPHAERIUM NO ACTIVITY I | FIGS. 18-21. Showing reactions to 4-6 cm. per sec, current in per cent, positive, negative, indifferent, and inactive (18-19) and in per cent, active individuals posi- tive, negative, and indifferent (20-21). The rapids community (18) shows a large percentage of inactivity while the percentage of active positiv
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NOTROPIS HYBOPSIS AMBLOPLITES CALOPTERYX CAMPFLOMA MACROMIA ANOOONTOIDES SPHAERIUM 0 10 20 30 40 50 60 70 80 90 1QQ. NOTROPIS HYBOPSIS AMBLOPLITES CALOPTERYX CAMPELOMA MACROMIA ANODONTOIDES ' SPHAERIUM NO ACTIVITY I | FIGS. 18-21. Showing reactions to 4-6 cm. per sec, current in per cent, positive, negative, indifferent, and inactive (18-19) and in per cent, active individuals posi- tive, negative, and indifferent (20-21). The rapids community (18) shows a large percentage of inactivity while the percentage of active positive (20) averages less than 50. The animals of the pool community were nearly all active. The first four non-burrowing species are strongly positive. It thus appears that 4-6 cm. per sec. is near the optimum for pool species. Temperature of water in experi- ments: Rapids animals 16° C.; pool animals 9° C. 4-6 cm. per sec. current are only a little greater than the negative and indifferent, excepting Argia which is thrown into line by the action of the current on the gill plates. The amount of activity was different for the different 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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