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Zoological Studies
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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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