. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Caudal keels Figure 2. An outline of Scomber japonicus (gray lines) traced from a video image showing finlets 3, 4, 5A, 5B, and the caudal keels tor reference. Note that the fifth finlet is morphologically composed of two distinct units (5A and 5B) that are bound by a clear membrane (Nauen and Lander. 2000). Each set of four points (black circles) defined two triangular shown by the solid and dotted lines. Three of the points on nnlets 5A and ?B (illustrated on the ventral finlets for clarity) were used to determin
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Caudal keels Figure 2. An outline of Scomber japonicus (gray lines) traced from a video image showing finlets 3, 4, 5A, 5B, and the caudal keels tor reference. Note that the fifth finlet is morphologically composed of two distinct units (5A and 5B) that are bound by a clear membrane (Nauen and Lander. 2000). Each set of four points (black circles) defined two triangular shown by the solid and dotted lines. Three of the points on nnlets 5A and ?B (illustrated on the ventral finlets for clarity) were used to determine the rigidity of the fifth dorsal finlet as a whole. The thin, clear membrane that covers each of finlets 1-5 and attaches to the body is depicted in gray on ventral finlets 3 and Figure 3. Diagram of a finlet (dark gray triangle) from a dorsal (A) and lateral (B) view. From the dorsal view (A) the v axis (indicated by an asterisk) is coming straight out of the page; in both views the .re plane is light gray. The internal angle (a), and the .vv. .v,-. and y- angles (dotted lines), shown here in the dorsal view of triangle A. were calculated from digitized points (Fig. 2). See the text for further explanation. tomized 3-D visualization program. All angle measure- ments were made from the upstream left side of the triangular surface to the plane of interest (Fig. 3). Under this measurement convention, if the left finlet surface was po- sitioned to the right of the body midline (as shown in Fig. 3) the yc angle was less than 90°; a yc angle greater than 90° indicated that the left finlet surface was on the left side of the body midline. An A; measurement greater than 90° indicated that the surface was tilted away from the floor of the tank (or the frontal plane of the fish, Fig. 3). An .vv angle measurement less than 90° indicated that the surface was oriented to the left of the body midline. Values of .vv angles decreased to 0° as the finlet moved parallel to the body m
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
