BIRDD Lab Week 1
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School
University of Cincinnati, Main Campus *
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Course
1081L
Subject
Geography
Date
Dec 6, 2023
Type
pptx
Pages
5
Uploaded by BrigadierSardinePerson917
BIRDD LAB
Mithuna, Hannah, Case, Madeline
RESEARCH QUESTION
Is there a significant difference in the beak length of female
G. fortis
specimens
between the islands of Floreana, San Cristobal, and Isabella?
PREDICTIONS
The beak length of female
Geospiza fortis
will increase with a
greater average quantity of rain on islands Isabela, San
Cristobal, and Floreana.
Ho -
There is no difference in the average beak length of female
G. fortis
between
the islands of Isabella, San Cristobal, and Floreana.
H
a
- There is a significant difference in the average beak length of female
G.
fortis
between the islands of Isabella, San Cristobal, and Floreana.
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DATA
Floreana
Isabela
San Cristobal
15.6
15.8
16
16.2
16.4
16.6
16.8
17
17.2
17.4
17.6
Islands
Average Beak Length (mm)
Figure 1. Average beak length (mm) of female
G. fortis
between islands Floreana,
Isabella, and San Cristobal, with standard error included
ANOVA ANALYSIS
Anova: Single Factor
SUMMARY
Groups
Count
Sum
Average
Variance
San Cristobal
99
1606
16.2222222
1.19827664
Isabela
125
2105.4
16.8432
1.51844129
Floreana
59
1024.9
17.3711864
1.03312098
ANOVA
Source of Variation
SS
df
MS
F
P-value
F crit
Between Groups
51.3735194
2
25.6867597
19.6704829
1.015E-08
3.02801359
Within Groups
365.638848
280
1.30585303
Total
417.012367
282
There is a significant difference in mean beak length between female
Geospiza fortis
found on
islands San Cristobal, Isabela, and Floreana (F
2,280
= 3.0280; P< 0.0001).