# IMG9592

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Characteristics of invasive species can include lack of predators, fast growth to : reproduction (with many offspring produced per reproductive cycle), strong dist generalist species (can live in many environmental conditions and eat a variety Based on the graph at the bottom, estimate the carrying capacity for this lionfish around 500 lionfish per 10,000 m? PART 2: Logistic Growth Models 4. Copy your values from the table in the Click & Learn into the table below, or insel Click & Learn. www.Biolnteractive.org Bet, hhmi Biolnteractive Lionfish Invasion: Density Dependent Population Dynamics 6. t Nt rmax,dNt | (K— Nt)/K AN/At Nes1 2004 20 23 0.96 22.08 42.08 2005 42.08 48.39 0.92 44.52 86.6 2006 86.6 99.59 0.83 82.66 169.26 2007 | 169.26 | 194.65 0.66 128.47 297.73 Copy the N1 values for each year into the table below, or insert a screenshot fro 2008 2009 2010 2011 2012 2013 297.73 434.69 499.68 499.68 499.68 499.68 Why is the continuous-time model more appropriate for modeling lionfish? Lionfish reproduce (and die) all throughout the year, so their population size is ( continuous-time model is more appropriate for capturing these frequent chang: Compare the three curves shown in the graph at the end of the section. a. How does the curve for the continuous-time model compare to the curve for The curve for the continuous-time model increases less steeply than the cun model, but both level off at the same carrying capacity by 2014. (You may w students why the models differ. Note that in the continuous-time model, th¢ updates constantly. In this particular discrete-time model, the population gi once a year.) b. How do the curves for both models compare to the population estimates bas might explain the differences? The curves based on the models are much smoother than the data-based es estimates have much greater year-to-year variation, including a big spike ir around the carrying capacity.