Allometry often studies shape differences in terms of ratios of the objects'dimensions.
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If the expected slope is outside the confidence intervals then there is allometry present.
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Male mate choice scales female ornament allometry in a cichlid fish.
From the sciencedaily.com
Allometry of the Duration of Flight Feather Molt in Birds.
From the sciencedaily.com
It would scale with positive allometry.
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The allometry of growth and reproduction.
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To determine whether isometry or allometry is present, an expected relationship between variables needs to be determined to compare data to.
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In this image, the observer is standing at ground level and looking up into a forest composed of a single species mathematically modeled to mimic the allometry of a population of Abies alba.