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Number of animals (thousands) 140- 120- 100- 80 wwwww 1855 1845 1875 1885 1895 Fig. 4.23 Snowshoe hare and Canadian lynx population numbers, 1845-1940 We have to assume that the numbers of animals trapped were small compared with the total populations, and that the numbers trapped were roughly proportional to total population numbers. Also assumed is that the prey always has enough food so does not starve. Given that, the cycles are remarkably constant with the lynx populations always smaller than and lagging behind the hare populations. 60 40- 20 1865 Questions 1 On average, what was the cycle length of the lynx population? 2 On average, what was the cycle length of the hare population? 3 Why do lynx numbers lag behind hare numbers? 1905 Snowshoe hare Lynx 1915 1925 1935

Number of animals (thousands) 140- 120- 100- 80 wwwww 1855 1845 1875 1885 1895 Fig. 4.23 Snowshoe hare and Canadian lynx population numbers, 1845-1940 We have to assume that the numbers of animals trapped were small compared with the total populations, and that the numbers trapped were roughly proportional to total population numbers. Also assumed is that the prey always has enough food so does not starve. Given that, the cycles are remarkably constant with the lynx populations always smaller than and lagging behind the hare populations. 60 40- 20 1865 Questions 1 On average, what was the cycle length of the lynx population? 2 On average, what was the cycle length of the hare population? 3 Why do lynx numbers lag behind hare numbers? 1905 Snowshoe hare Lynx 1915 1925 1935

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Number of animals (thousands) 140- 120- 100- 80- www 1845 1855 1875 1885 1895 Fig. 4.23 Snowshoe hare and Canadian lynx population numbers, 1845-1940 We have to assume that the numbers of animals trapped were small compared with the total populations, and that the numbers trapped were roughly proportional to total population numbers. Also assumed is that the prey always has enough food so does not starve. Given that, the cycles are remarkably constant with the lynx populations always smaller than and lagging behind the hare populations. 60 40 20 1865 Questions 1 On average, what was the cycle length of the lynx population? 2 On average, what was the cycle length of the hare population? 3 Why do lynx numbers lag behind hare numbers? 1905 Things are never as straightforward in ecology as we expect though. In regions where lynx died out, hare populations still continued to fluctuate. Why do you think this was? Snowshoe hare Lynx 1915 1925 1935
Transcribed Image Text:Number of animals (thousands) 140- 120- 100- 80- www 1845 1855 1875 1885 1895 Fig. 4.23 Snowshoe hare and Canadian lynx population numbers, 1845-1940 We have to assume that the numbers of animals trapped were small compared with the total populations, and that the numbers trapped were roughly proportional to total population numbers. Also assumed is that the prey always has enough food so does not starve. Given that, the cycles are remarkably constant with the lynx populations always smaller than and lagging behind the hare populations. 60 40 20 1865 Questions 1 On average, what was the cycle length of the lynx population? 2 On average, what was the cycle length of the hare population? 3 Why do lynx numbers lag behind hare numbers? 1905 Things are never as straightforward in ecology as we expect though. In regions where lynx died out, hare populations still continued to fluctuate. Why do you think this was? Snowshoe hare Lynx 1915 1925 1935
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