Is there evidence that random genetic drift in the inbred Swedish population had led to a decline in mean fitness that was sufficient to cause the extinction of the population? Here, I am asking about the Swedish population before the outbred snakes were introduced. What is the evidence for a decline in mean fitness, if you believe this happened?

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN:9781305967359
Author:STARR
Publisher:STARR
Chapter40: Population Ecology
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Is there evidence that random genetic drift in the inbred Swedish population had led to a decline in mean fitness that was sufficient to cause the extinction of the population? Here, I am asking about the Swedish population before the outbred snakes were introduced. What is the evidence for a decline in mean fitness, if you believe this happened?

35
30
25
All snakes
20 males from outside
oopulations were
introduced into the
inbred Swedish
population in 1992.
15
10
New juveniles
5
1981 1983 1985 1987 1989 1991 1993 1995 1997 1999
Year
The introduced males
were removed in 1996.
EVOLUTION de, Figure 7.15
O2017 Sinauer kiwociates, Inc.
20
LO
Number of snakes
Transcribed Image Text:35 30 25 All snakes 20 males from outside oopulations were introduced into the inbred Swedish population in 1992. 15 10 New juveniles 5 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 Year The introduced males were removed in 1996. EVOLUTION de, Figure 7.15 O2017 Sinauer kiwociates, Inc. 20 LO Number of snakes
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