Fig. 2From: Testicular length as an indicator of the onset of sperm production in alpacas under Swedish conditionsLength increment model for alpaca testicle length. Experiment 1, “farm”, n = 72; solid line (mean), and dark grey polygon (95 % CI); Experiment 2 (from castrations (n = 22) and cadavers (n = 6); dashed line (mean) and light grey polygon (95 % CI). Note: the measurements on living animals included the scrotal layers whereas organs obtained after castration or from cadavers did notBack to article page