. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 276 D. A. HUGHES 100 I 75 MOVEMENT UPSTREAM 50 50 MOVEMENT DOWNSTREAM 75 n 75 MOVEMENT UPSTREAM 50 25- 50- MOVEMENT DOWNSTREAM 75 H. 1200 17002200 03000800 1300 1800 2300 0400 0900 14001900 2400 0500 1000 1500 TIME OF DAY FIGURE 3. The pattern of swimming of juvenile shrimp collected from a late night ebb tide (Quarter Moon). For further explanation see Figure 1. respectively, in the complete absence of externally changing environmental factors. The upstream and downstream phases which predominated at the times of alternate
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 276 D. A. HUGHES 100 I 75 MOVEMENT UPSTREAM 50 50 MOVEMENT DOWNSTREAM 75 n 75 MOVEMENT UPSTREAM 50 25- 50- MOVEMENT DOWNSTREAM 75 H. 1200 17002200 03000800 1300 1800 2300 0400 0900 14001900 2400 0500 1000 1500 TIME OF DAY FIGURE 3. The pattern of swimming of juvenile shrimp collected from a late night ebb tide (Quarter Moon). For further explanation see Figure 1. respectively, in the complete absence of externally changing environmental factors. The upstream and downstream phases which predominated at the times of alternate tides are not only phases during which shrimp swim in opposite direc- tions with respect to the current but also differ with respect to the level of activity involved. The level of activity involved in downstream swimming, is considerably lower than that employed when swimming upstream. This is evident from the fact that counts, made during times of downstream swimming, were approximately of the same magnitude as those made during times of upstream swimming, whereas. 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
