Clayton Lamb

TITLE: Limits to population growth of an apex omnivore: Untangling the influences of human predation, competing species and high nutritional requirements

Co-supervised by Dr. Stan Boutin and Dr. Scott Nielsen

My research aims to identify the net influence of limiting factors on grizzly bear population growth and its determinants. I will use recent advances in genetic approaches and non-invasive hair collection methods to identify individual animals and estimate population size, track individual survival, reproduction and movements. Specifically, I will test the cumulative effects of human harvest, black bear occurrence and key food resources on grizzly bear demography, and investigate the complex interactions between these factors across the landscape.  In addition, I am using these data to investigate the influence of ecological trap dynamics on this species. Identifying general patterns of demographic variation will inform the research and management of this species across its range as well as provide a rigorous test of population theory


Twitter: @ClaytonTLamb


Hämäläinen, A., Broadley, K., Droghini, A., Haines, J.A., Lamb, C.T., Boutin, S., Gilbert, S. (2017). The ecological significance of secondary seed dispersal by carnivores. Ecosphere. 8 (2): e01685.

Lamb, C.T., Mowat, G., McLellan B.N., Nielsen, S.E., Boutin, S.  (2017). Forbidden fruit: Human settlement and abundant fruit create an ecological trap for an apex omnivore. Journal of Animal Ecology. 86(1): 55-65.

Mowat, G.,  Lamb, C.T. (2016). Population status of the South Rockies and Flathead grizzly bear populations in British Columbia, 2006-2014. Prepared for the Ministry of Forests Lands and Natural Resource Operations, Province of British Columbia. Nelson. BC.

Lamb, C.T., Walsh, D., Mowat, G. (2016). Factors influencing detection success of grizzly bears at genetic sampling sites. Ursus. 27(1): 31-44.

Robson, K.M., Lamb, C.T., Russello, M.A. (2016). Low genetic diversity, restricted dispersal and elevation-specific patterns of population decline in American pikas in an atypical environment. Journal of Mammalogy. 79(2):464–472

Lamb, C.T., Robson, K.M., Russello, M.A. (2014) Development and application of a   molecular sexing protocol in the climate-change sensitive American pika. Conservation Genetic Resources 6:17-19.

Lemay, M.A., Henry, P., Lamb, C.T., Robson, K.M., Russello, M.A. (2013) Novel genomic resources for a climate change sensitive mammal: Characterization of the American pika transcriptome. BMC Genomics 14:311.