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# GVPT 100 Lecture Notes - Lecture 7: Temperate Climate, Poikilotherm, HomeothermyExam

Department
Government and Politics
Course Code
GVPT 100
Professor
Irwin Morris
Study Guide
Final

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BSCI 207 Spring 2019
Homework #4: Thermal tolerance & climate change
11:59 P.M., Monday, 8 April
You may work on this homework on your own or discuss it with others. If you work through
questions with others, be sure to turn in your own work, at the level at which you understand it.
Do not simply copy answers from or for someone else. Questions such as these will show up on
exams, so be sure to work to understand how to arrive at the answers.
1. (3 pts). Explain why, within typical real-world
temperature ranges in the temperate zone, homeotherm
and poikilotherm metabolic rates show the general
relationships to ambient temperature shown in the plot at
right.
2. (7 pts). For ectotherms in aquatic ecosystems, temperature & dissolved oxygen (DO) tend to
dominate physiology & behavior: temperature is a controlling factor that sets the rate of
metabolism, whereas DO is a limiting factor.
Using the data in the table below, make a graph of metabolic rates of inactive & active fish (on Y-axis)
as a function of water temperature (on X-axis). You can either plot both active and inactive fish on the
same graph or make two separate graphs.
Water Temp (°C)
O2 conc. in
water (ml/L)
Metabolic rate of inactive
fish [ml O2/(kg X hr)]
Metabolic rate of active fish
[ml O2/(kg X hr)]
5
9.0
8
30
15
7.0
50
110
25
5.8
140
255
35
5.0
225
285