Beldings Ground Squirrel Population Study squirrel

Former USF MS Biology graduate students Jessica Weidenbach and Marissa Lafler worked with me and my colleague Dr. Scott Nunes to combinine behavioral data with genetics data from a population just outside Yosemite National Park. Belding's ground squirrel is a social montane rodent that lives in alpine and subalpine meadows in the Sierra Nevadas. The Tioga pass (Mono Co., CA) population has been used for mammalian behavioral studies, but as of yet, no systematic study of the population structure has been conducted. In addition to sampling the squirrels Marissa has analyzed previously collected samples in order to determine both population structure and paternity in multiply sired litters. This information will augment behavioral observations made regarding play between littermates, and provide an understanding of the population genetics of a species important to behavioral studies. Our paper was recently published in the Journal of Behavioral Ecology and Sociobiology: Sibling relatedness and social play in juvenile ground squirrels

marissa lafler
Belding's ground squirrel being held by Marissa Lafler Taking an ear clipping for DNA sampling


Dr. Dever working with an undergrad student (Paul Bianchi) Study site - right outside Yosemite National Forest (east enterance)

Former undergraduate student Michell Curtin presented a poster at the Bay Area Conservation Symposium held at UC Davis- below is her abstract:

Mitochondrial variation of a Belding's ground squirrel (Urocitellus beldingi) population

Social behavior can impact evolutionary processes. Therefore, given the opportunity to examine a species exhibiting high levels of social interaction enables us to understand the connection between social behavior and genetic structure. In particular, we are interested in Belding's ground squirrels whose social behavior is distinctly characterized by nepotism. Although this particular species is not under any present threat it may be used as model for conservation efforts to understand other social species at risk of extinction. As part of a preliminary study, observations of individuals were made for the identification of mothers and offspring from one population. DNA was then isolated from these individuals to be used for genetic analyses. Portions of the mitochondrial DNA from the cytochrome-b gene (cyt-b) and the displacement loop (D-loop) were amplified using PCR and then sequenced. Approximately 400 base pairs from each region were examined to assess within-population haplotype diversity.

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