. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FLOW AND FEEDING IN LEPTOGORGIA 349 oriented perpendicular to directional currents and can be used to test the hypothesis that this orientation confers some feeding advantage. Feeding studies Feeding rates of each colony in perpendicular and parallel orientation were calculated from best fit linear regression plots of log # Artemia/liter vs. time in hours. The semi-log plot (Fig. 4) is an estimate of feeding rate (Jdrgensen, 1949). Observed differences in slopes for parallel and perpendicular orientation were tested for sign
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FLOW AND FEEDING IN LEPTOGORGIA 349 oriented perpendicular to directional currents and can be used to test the hypothesis that this orientation confers some feeding advantage. Feeding studies Feeding rates of each colony in perpendicular and parallel orientation were calculated from best fit linear regression plots of log # Artemia/liter vs. time in hours. The semi-log plot (Fig. 4) is an estimate of feeding rate (Jdrgensen, 1949). Observed differences in slopes for parallel and perpendicular orientation were tested for significance by analysis of covariance (Snedecor and Cochran, 1967, p. 433). For ease of presentation, feeding rates are presented in Table II as the percentage of Arteinia consumed/colony/hour. It can be seen in Table II that in all cases, colonies in a perpendicular orienta- tion capture as many or more Arteinia per unit time than the same colonies oriented parallel to flow. The range of differences is great and not all differences are. Hours FIGURE 4. Best fit linear regression of log # Artemia/liter vs. time for colony #1 water tunnel feeding experiments. Slopes are a measure of feeding rate and are significantly differ- ent (Fi,38 = , P<) for perpendicular orientation (open circles, y = — + ) rs. parallel orientation (closed circles, y = — + ). Experiments in which colonies did not expand are used as controls (C, dashed line) and show no significant loss of Arteinia over 18 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,
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
