. The ecology and life history of the common frog (Rana temporaria temporaria). Rana temporaria. 140 ECOLOGY AND LIFE HISTORY OF THE COMMON FROG that it must diminish run~ofF. If so, it should delay spawning. But if there is not much rain in any period, there may be no run-off to diminish, for this ceases at low rainfalls. It was therefore possible that when the rain was low, a direct action of sunshine would be revealed ISOPHENES IN YEAR-DAYS. 100 200 RAINFALL IN MILLIMETRES Fig. 38. Joint Functional Regression Diagram, Showing the Relation between Sunshine and Rainfall, and Spawn Date, for t
. The ecology and life history of the common frog (Rana temporaria temporaria). Rana temporaria. 140 ECOLOGY AND LIFE HISTORY OF THE COMMON FROG that it must diminish run~ofF. If so, it should delay spawning. But if there is not much rain in any period, there may be no run-off to diminish, for this ceases at low rainfalls. It was therefore possible that when the rain was low, a direct action of sunshine would be revealed ISOPHENES IN YEAR-DAYS. 100 200 RAINFALL IN MILLIMETRES Fig. 38. Joint Functional Regression Diagram, Showing the Relation between Sunshine and Rainfall, and Spawn Date, for the Month Mi The most important part is between about 80 mm of rainfall and 18 per cent of sunshine, where alone sunshine accelerates spawning. Under all other conditions, sunshine retards spawning. Note particularly the very late dates when it has been both sunny and dry. as an accelerating influence. Which of these effects would predominate could not be forecast, and the fmal graphs provided another of the dramatic episodes of the investigation, for both effects appeared at the correct places on the same diagrams. Mi, Sunshine and Rainfall. At low rainfalls, so low that there would be Httle or no run-off, the effect of this factor disappears. In. 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
