
To find:
Mathematical ecologists created a model to analyze population dynamics of the endangered northern spotted owl in the Pacific Northwest. The ecologists divided the female owl population into three categories: juvenile (up to 1 yr old), sub adult (1 to 2 yr old), and adult (over 2 yr old). They concluded that the change in the makeup of the northern spotted owl population in successive years could be described by the following matrix equation.
The numbers in the column matrices give the numbers of females in the three age groups after n years and
Each year 33 juvenile females are born for each 100 adult females | |
Each year 18% of the juvenile females survive to become sub adults. | |
Each year 71% of the sub adults survive to become adults, and 94% of the adults survive. |
(Source: Lumberton, R. H., R. McKinley, B. R. Noon, and C. Voss, “A Dynamic Analysis of Northern Spotted Owl Viability in a Fragmented Forest Landscape,” Conservation Biology, Vol. 6, No. 4.)
(a) Suppose there are currently 3000 female northern spotted owls made up of 690 juveniles, 210 sub adults, and 2100 adults. Use the matrix equation to determine the total number of female owls for each of the next 5 yr.
(b) Using advanced techniques from
What can we conclude about the long-term fate of the northern spotted owl?
(c) In the model, the main impediment to the survival of the northern spotted owl is the number 0.18 in the second row of the
• The first year of life is precarious for most animals living in the wild.
• Juvenile owls must eventually leave the nest and establish their own territory. If much of the forest near their original home has been cleared, then they are vulnerable to predators while searching for a new home.
Suppose that, thanks to better forest management, the number 0.18 can be increased to 0.3. Rework part (a) under this new assumption.

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Chapter 5 Solutions
Essentials of College Algebra (12th Edition)
- C Clever | Portal x ALEKS - Marisa Haskins - Le Marisa Haskins - Essay Temp x Earth and Space 2 Desmos | Graphing Calculator x cwww-awy.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3JH-IQ2_KWXW3dyps2nJxZ_kvzXfsB26H8ZG13mFzq9lmGAYN JJOEyt0CsUr4AMXmcIVNqw-dNsEi_PzyC7v ◇ Exponents and Exponential Functions Finding the final amount in a word problem on compound interest 0/5 Ma John deposited $4000 into an account with 4.6% interest, compounded annually. Assuming that no withdrawals are made, how much will he have in the account after 7 years? Do not round any intermediate computations, and round your answer to the nearest cent. $0 Explanation Check 1 ! 12 Q W # 3 品: S חח E $ SA 4 4 a R 5775 % e MacBook Air ৫ Di F6 DD ©2025 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessi 8 * ∞ & 27 Λ <6 T Y U DII DD FB 8° - A 1 2 小 F10 F11 ) ) 9 0 יו 0 P {arrow_forwardfor B in question 2, the inner product Is the picture given alonearrow_forward2. Assume that ƒ: R100 R² is linear and that for certain u, ER100 f(u) = - (4) and ƒ(v) = (2). Explicitly compute with work the following: (a). (b) (c) f(u+v) f(100) Assume that W is a vector space and g,h: W → R are both linear maps. Show that the function k : W→ R², k(w) = (()) is linear.arrow_forward
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