. The ecology and life history of the common frog (Rana temporaria temporaria). Rana temporaria. 20 ECOLOGY AND LIFE HISTORY OF THE COMMON FROG top of a shallow vessel, if they were stimulated by lack of oxygen. This shortage of oxygen was sometimes produced by merely allowing the tadpoles placed in the horizontal tube to exhaust that which was present at first, and sometimes by removing oxygen from the water artificially. When this was done, the Httle animals became restless, and swam upwards. If these movements took them into a better- oxygenated part of the vessel, they stopped swimming. Th
. The ecology and life history of the common frog (Rana temporaria temporaria). Rana temporaria. 20 ECOLOGY AND LIFE HISTORY OF THE COMMON FROG top of a shallow vessel, if they were stimulated by lack of oxygen. This shortage of oxygen was sometimes produced by merely allowing the tadpoles placed in the horizontal tube to exhaust that which was present at first, and sometimes by removing oxygen from the water artificially. When this was done, the Httle animals became restless, and swam upwards. If these movements took them into a better- oxygenated part of the vessel, they stopped swimming. This move- ment was therefore a combination of a kinesis (random movement. 12 3 4 CENTIMETRES. 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 Savage, Ronald Maxwell. New York, Hafner Pub. Co.
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Keywords: ., bookcentury1900, bookcollectionbiodiv, booksubjectranatemporaria
