Монгол тарваганы бтетйн температурын тувщин, удамшлын систем ба халдвар тэсвэрлэх чадвартай тууний шутэлцээтэй байдал. Mongol tarbagnany bieiïn temperatouryn touvshin, oudamshlyn sistem ba takhlyn khaldvar tesverlekh tchadvartaï tououniïn shouteltseeteï baïdal [Body temperature of Mongolian marmots and its relationship to with resitance to plague infection and the hereditary system marmot. Température corporelle des marmottes de Mongolie en relation avec la résistance à la peste et à l’hér

Résumé

The body temperature of individual marmots within a single population varied greatly. The range of body temperature has 25-40°C and followed a normal distribution. Separate marmot populations were characterized by significantly different body temperature means, coefficients variation, distributions, and ranges. Mean body temperature of marmots in the population in an intensified plague focus was low (34.4°C), and it was higher by about 3 degrees within populations in areas of non-intensified focus and free of plague (37.7, 37.3°C). Body temperature was not dependent on age, sex, nor climatic changes. 2. Marmot body temperature is partially determined by individual’s blood serum transferrin. Marmots which possessed the TfL gene were characterized by high body temperature and marmots which possessed both TfM, and the TfK genes were characterized by middle and low temperatures. The frequencies of the TfL allele increased and other allelic frequencies of transferrin decreased following the plague epizootic. Thus, marmots having high body temperature persisted during plague epizootic. Following the epizootic mean body temperatures within the marmot population increased by 2.2° C. The relationship between the transferrin system and marmot body temperature was clearly indicated by 3 results. First, mean body temperature of different marmot populations was significantly correlated with the frequency of the TfL allele in each population. Second, both the proportions of the TfL allele and the mean body temperature of marmots in the population increased during the plague epizootic. Thus, transferrin allelic fitness changed during the plague epizootic, as TfL allelic fitness increased significantly relative to both the TfM and the TfK alleles. Finally, there was a significant correlation between genetic distance at the transferrin locus and mean body temperature differences of marmots from geographically separate populations.