Exam (elaborations)
RNR 2031 Exam 1 Questions With Complete Solutions
- Course
- Institution
RNR 2031 Exam 1 Questions With Complete Solutions
[Show more]
Content preview
RNR 2031 Exam 1 Questions With Complete Solutions· Allee effects Correct Answer o An Allee effect describes a
situation where populations decline at low density
§ Mate selection
§ Group vigilance/defense
§ Group foraging
§ Minimum colony size
Genetic effects
· Density dependence Correct Answer o Usually seen as a
linear, inverse relationship between population growth rate and
population density (population growth decreases as density
increases) and may occur if individuals compete or predators are
more effective as a prey population increases. (Science Direct).
· The North American Model (7 tenants) Correct Answer o
Wildlife as a public trust resource
o Elimination of markets for game
o Allocation of wildlife by law
o Kill for only legitimate purposes.
o Wildlife as an international resource
o Science-based wildlife policy
o Democracy of hunting
· Verhulst's equation Correct Answer Logistic growth equation
A discrete population follows the logistic growth equation and
provides r(0.02), N0(680), and K(800). How do you estimate the
population one time step into the future? Correct Answer Use
logistic growth equation dN/dt=rN(1-(N/K)). 0.02 x 680 (1-
, (680/800))= triangle N= 2.04 + 680 is 682 (Never decimals with
animals). Population one timestep in future is 682
A population is growing provided r (0.12) and k (3,600). At
what population size is harvest maximized? What is the annual
maximum sustained yield at that population? Correct Answer
First use k/2=3,600/2= Pop size 1,800 harvest max. Then
MSY=rk/4= (0.12)(3,600)/4= annual MSY is 108
Calculating harvest and equilibrium populations Correct
Answer If it has MSY and recommended harvest %. Use
logistic equation and sub N with MSY at k/2. Do answer x
0.percent. Use that answer as dN/Dt and solve for N. For
example to solve last step of 28 = .15 x N (1-N/1000) do the
math, solver, put in Equation .00015x^2 -.15x + 28 in E1 and 0
in E2. Do same thing as last time. The first number is how many
animals can be sustainably harvested, second is the stable
consistent population
Calculating harvest and equilibrium populations Correct
Answer Plug SY in for dN/Dt of logistic equation and solve for
N. In calc do math, numeric solver. For 26.25 = .24 x N (1 -
N/1000) you would type in .00024x^2 -.24x + 26.25 in E1 and 0
in E2. For X put a number you maybe think and ALPHA enter.
That is your first number. Then replace x with higher number
and repeat. That is your second number
Challenges to the North American Model: Correct Answer ·
Poaching, enforcement (esp in diff countries), barriers,
democracy of hunting
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Classroom. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now