. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 346 GORDON J. LEVERSEE 60 5O S 40 D CT o; £ 30 c CD u l_ QJ Q_ 20 10 1O 5O 90 130 Degrees 170 FIGURE 2. Orientation of fan-shaped colonies in the channel population relative to tidal current direction. Colonies are grouped in 10" classes, 90° representing an orientation per- pendicular to the current. The probability that the observed distribution is a chance sampling from a random distribution (represented by dotted line) is less than (Xjrf — 299). thick, working area current velocities were equal to central velo
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 346 GORDON J. LEVERSEE 60 5O S 40 D CT o; £ 30 c CD u l_ QJ Q_ 20 10 1O 5O 90 130 Degrees 170 FIGURE 2. Orientation of fan-shaped colonies in the channel population relative to tidal current direction. Colonies are grouped in 10" classes, 90° representing an orientation per- pendicular to the current. The probability that the observed distribution is a chance sampling from a random distribution (represented by dotted line) is less than (Xjrf — 299). thick, working area current velocities were equal to central velocity minus 1-10%. Current velocities in the boundary layer were found to be reduced by up to 50% below central velocity. The tunnel was filled with sea water filtered through a 5 micron filter bag. Selected fan-shaped colonies were collected and held in filtered sea water for a 24-hour fasting and acclimation period before use. They were then placed in the tunnel oriented either parallel or perpendicular to the current direction and al- lowed to acclimate further for several hours before Artcinia nauplii were added. Living Artcjuia nauplii were harvested from culture 24 hours after eggs had been. 30cm FIGURE 3. Recirculating water tunnel seen from above: lab stirrer (a), laminator (b), baffles (c), and working area with colony (d). Flow direction is indicated by 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
