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Zoological Studies

Table 4 Multiple regression of the dependent and independent variables

From: A comparative study of shell variation in two morphotypes of Lymnaea stagnalis (Mollusca: Gastropoda: Pulmonata)

Morphotype

Regression statistics

Significant variables

N

R2

F

p

Variable

R2

F

p

L. fragilis

53

0.46

7.9476

0.000017

Precipitation

0.42

15.09

0.0003

L. stagnalis

44

0.34

4.916

0.0026

Longitude

0.15

7.159

0.005

Precipitation

0.26

6.47

0.011

  1. First principal component (PC1) as the dependent variable and latitude, longitude, altitude, and five climatic indicators as the independent variables. PC1 explains 93.3% of the overall variation in L. fragilis and 91.6% in L. stagnalis s. str. Significant results are italicized.
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