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Body length (cm) predicts body mass (g) in low and high competition males butnot in isolated males (low competition; y = 0.52x − 0.67 and high competition; y = 0.89x − 7.15). Only under high competition (Social 6), the body length (cm) and body mass (g) of the males predicts their circulating plasma cortisol levels (ng/ml). The regression models are y = 6.21x − 43.24 for body length vs. cortisol and y = 6.75x + 8.40 for body mass vs. cortisol.
