. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 306 BURKY, PACHECO, AND PEREYRA 50 — o. 30 35 40 Oven Temperature 45 50 FIGURE 2. Body temperature of Pomacea urceus (closed circles) with 95% confidence intervals and the temperature of water in an open beaker (open squares) are plotted against oven temperature. The isothermal line is given for reference. For further details, see text. MATERIALS AND METHODS Pomacea urceus was collected in the plains (Los Llanos) region of Venezuela. Field studies were carried out in the local area known as El Estero de Camaguan near the vil
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 306 BURKY, PACHECO, AND PEREYRA 50 — o. 30 35 40 Oven Temperature 45 50 FIGURE 2. Body temperature of Pomacea urceus (closed circles) with 95% confidence intervals and the temperature of water in an open beaker (open squares) are plotted against oven temperature. The isothermal line is given for reference. For further details, see text. MATERIALS AND METHODS Pomacea urceus was collected in the plains (Los Llanos) region of Venezuela. Field studies were carried out in the local area known as El Estero de Camaguan near the village of Camaguan in Guarico State. Laboratory experiments on tem- perature and oxygen consumption were carried out on aestivating and active snails collected during the dry and rainy seasons, respectively. Snails were experimentally exposed to the tropical sun to record their response to the absorption of solar radiation. Aestivating adult snails were placed (aperture opening downward) on a gray wooden surface on a roof terrace of the laboratory in Caracas. Experiments were set up in the morning before the sun was high enough to directly illuminate the experimental area (initially the snails were in the shade). In this way the snails were gradually exposed to the direct tropical sun. During the day the major influences on solar radiation were the passage of clouds and the angle of the rays as the position of the sun changed. Temperatures of shaded air, exposed wooden surface about 25 cm from the snail, upper exposed shell sur-. 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
