. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. -21' •: KOROR ISLAND.•:.•'. i 05 V-V:V::':-•.•. 134° 27 E 28' 7°20 N 29 Fici'KE 1. Map of Arakabesan, Auluptagel, and nearby area of the Palau Islands. The experimental site was at E and all the Zenarchopterus used were collected at H. The double headed arrow near the latter indicates the main trend of the inter-island channel adjacent to // (channel axis 150-330°). Island peak elevations are given in feet. Outer edge of coral reefs are represented by scalloped outlines, mangrove areas by cross-hatching. mined every 10 iiiin
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. -21' •: KOROR ISLAND.•:.•'. i 05 V-V:V::':-•.•. 134° 27 E 28' 7°20 N 29 Fici'KE 1. Map of Arakabesan, Auluptagel, and nearby area of the Palau Islands. The experimental site was at E and all the Zenarchopterus used were collected at H. The double headed arrow near the latter indicates the main trend of the inter-island channel adjacent to // (channel axis 150-330°). Island peak elevations are given in feet. Outer edge of coral reefs are represented by scalloped outlines, mangrove areas by cross-hatching. mined every 10 iiiin with compass and sextant (Fig. 2). To document cloud cover conditions, photographs of the sky were taken at similar intervals with a camera having a fisheye lens. The sky generally was 35-40% obscured by light scattered clouds on the two days concerned. However, fish orientation was recorded only when the sun was clearly visible. When a small cloud briefly obscured the sun, measurements were suspended until the sun was again shining. Twenty-four specimens of Zenarchopterus were studied, each under four optical conditions: (1) without the polarizer (NF condition), during which the fish was exposed only to the natural illumination of sun and sky; and (2, 3 and 4) with a Polaroid linear polarizer (Type KN36) placed over the experimental vessel (WP 'lition) .11 id oriented at three different directions with respect to the sun's bearing 3). Since six planes of polarization were tested altogether (0-180°, 30-210°,. 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
