Knowledge of Where Animals Forage for Food Is Essential for Effective

question 5

Essay

Knowledge of where animals forage for food is essential for effective wildlife
management and conservation. The data below are foraging heights (in m) for a
sample of Mountain Chickadees. The data are taken from two different species of fir
trees: the Douglas fir and the White fir. Douglas: $22,15,16,16,16,17,17,17,18,19,19,10,10,13,13,14$ $6,7,7,8,8,9,3$

White: $28,25,21,21,18,18,16,14,14,15,15,15,15,12,12,13$ $13,11,11,8,8,7,5,3$ (a) Display these data using a comparative (back-to-back) stem-and-leaf plot. Use
the stems shown below, and be sure to include all information needed to compare
the two distributions. |OL |
| OH|
| 1L|
| 1H|
| 2L |
$| 2 \mathrm { H } |$ (b) Compare the distributions in part (a). What differences and similarities do you
observe in the two distributions?
(c) When Mountain Chicadees are sampled to assess their health, they are captured in
mist-nets, which are set to capture the birds at different heights. The mist nets are
about 2 meters high, and directions must be given to the persons who set up the
nests so that the mist-nets are positioned to capture the most birds. Based on the
data from part (a) and your display in part (b), write a short paragraph describing
the appropriate mist-net height in a forest region of Douglas firs and for a forest
region of White firs.

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Definitions:

Brachial Artery

A major blood vessel of the upper arm that supplies blood to the arm and hand, often used for measuring blood pressure.

Popliteal

Relating to the area behind the knee joint, where several important nerves and blood vessels pass.

Femoral

Relating to the femur or thigh bone, often used in medical contexts to describe related structures, procedures, or conditions.

Blood Viscosity

A measure of the thickness and stickiness of an individual's blood, impacting how blood flows through vessels.