28, 313–316 (1942)īlanchard, F.N., Blanchard, F.C.: Mating of the garter snake Thamnophis sirtalis sirtalis (Linneaus).
New York-London: Academic Press 1976īlanchard, F.C.: A test of fecundity of the garter snake Thamnophis sirtalis sirtalis (Linneaus) in the year following the year of insemination. We discuss our conclusions in light of previous studies and identify in the latter, analytical shortcomings which we believe hinder interpretation and synthesis.Īleksiuk, M.: Cold-induced aggregative behavior in the red-sided garter snake ( Thamnophis sirtalis parietalis). In contrast with other studies, we found no indication that the body temperatures of gravid and nongravid females differ either in mean or variance. Air and ground-surface temperatures, and snout-vent length, are poor predictors of body temperature. This and related considerations suggest to us that males are less determined, or less precise, thermoregulators than are females. Under cloudy skies, body temperatures are lower and more variable than under sunny skies, and the difference between males and females disappears. The frequency distribution of body tempratures for females is skewed to the left, whereas that for males is nearly symmetrical. On sunny days in midsummer, females average about 1 C° warmer than males. The body temperatures of snakes caught in the field are cooler and more variable early and late in the day, and early and late in the active season. This paper describes the thermal biology of the common garter snake, Thamnophis sirtalis, a diurnal, viviparous colubrid.
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