Allometric scaling is a powerful approach for studying the relationship between size, shape and function. We studied allometric slopes in Linyphia triangularis, measuring two male and one female genital characters and several male and female non-genital characters including male chelicerae that are used for fighting. As predicted from theory, genitalia had the lowest allometric values, fighting structures the highest.
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allometry
copulatory organs
Linyphia
sexual selection