WebApr 6, 2024 · After correcting for general allometric variation in cranial size, we found that in both North American Peromyscus mice and African laminate-toothed (Otomys) rats, … WebSep 9, 2016 · Our results suggest that behavioural adjustments to the environment can produce countergradient variation in physiological traits. More broadly, our work …
Thermoregulatory behaviour explains countergradient variation …
WebJun 1, 1995 · Countergradient variation is a geographical pattern of genotypes (with respect to environments) in which genetic influences on a trait oppose … WebJun 1, 1995 · Countergradient variation is a geographical pattern of genotypes (with respect to environments) in which genetic influences on a trait oppose environmental influences, thereby minimizing phenotypic change along the gradient. Phenotypic similarity across changing environments ought to be of intense interest because it belies … gtech hospitalar
Genetic factors have a major effect on growth, number of ... - PLOS
Countergradient variation is a type of phenotypic plasticity that occurs when the phenotypic variation determined by a biological population's genetic components opposes the phenotypic variation caused by an environmental gradient. This can cause different populations of the same … See more Countergradient variation, originally termed "contra-gradient variation", was coined by Richard Levins in his 1968 book Evolution in Changing Environments. Levins first used the term when describing patterns of body … See more Populations that inhabit high latitudes experience shorter growing seasons than those that inhabit low latitudes due to the differences in … See more 1. ^ Conover, David; Schultz, Eric (1995). "Phenotypic similarity and the evolutionary significance of countergradient variation". Trends in Ecology & Evolution. 10 (6): 248–252. doi:10.1016/s0169-5347(00)89081-3. PMID 21237029. 2. ^ Levins, Richard … See more The following are among the discovered cases of countergradient variation. The species name is followed by the trait affected and the environmental gradient studied. See more Countergradient variation is the opposite of cogradient variation, in which the environmental effect on the phenotype enhances the genetic effect on the phenotype. One … See more WebMay 1, 2002 · The common-environment experiments revealed countergradient variation: maximum growth rate increased with latitude both within and among species. However, growth reaction norms of the northern species were shifted to a lower range of temperatures than those of the southern species, indicating adaptation to temperature at the … WebApr 6, 2024 · After correcting for general allometric variation in cranial size, we found that in both North American Peromyscus mice and African laminate-toothed (Otomys) rats, highland rodents had smaller endocranial volumes than lower-elevation rodents, consistent with the expensive tissue hypothesis. In the former group, Peromyscus mice, crania were ... gtech hoover bags price