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1. Oregon spotted frogs in the Fraser Valley breed once per year in March. Using mark-recapture
Kissel estimated the number of females in a critically endangered population (Morris Valley) in
spring 2011 to be 159. In 2012 , she estimated the number of females to be 137. a. Which of the
four simple population models introduced in lecture would it be most appropriate to use to
estimate population size after 5 years, if no conservation actions are taken? State why? b.
Calculate and plot the population abundance for the next 5 years. Be sure to label your axes and
include units if needed Using a captive breeding program, the Vancouver Aquarium released
young Oregon-spotted frogs into the Fraser Valley population and increased lambda to 1.1. How
many years would it take for the population to double if captive breeding and release started in
2013? Doubling time for the exponential growth model is given by t = lo g 0 2/ r

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  • 1. 1. Oregon spotted frogs in the Fraser Valley breed once per year in March. Using mark-recapture Kissel estimated the number of females in a critically endangered population (Morris Valley) in spring 2011 to be 159. In 2012 , she estimated the number of females to be 137. a. Which of the four simple population models introduced in lecture would it be most appropriate to use to estimate population size after 5 years, if no conservation actions are taken? State why? b. Calculate and plot the population abundance for the next 5 years. Be sure to label your axes and include units if needed Using a captive breeding program, the Vancouver Aquarium released young Oregon-spotted frogs into the Fraser Valley population and increased lambda to 1.1. How many years would it take for the population to double if captive breeding and release started in 2013? Doubling time for the exponential growth model is given by t = lo g 0 2/ r