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Fig. 3 | Frontiers in Zoology

Fig. 3

From: Neuroendocrine patterns underlying seasonal song and year-round territoriality in male black redstarts

Fig. 3

Mean estimates ± 95% CI and individual data points of testis volume and testosterone concentrations across seasons. Testes (a) were larger during breeding (N = 7) compared to molt (N = 5) and nonbreeding (N = 6; p < 0.001). Plasma levels of testosterone (b) were higher during breeding than during molt and nonbreeding (p = 0.01)

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Frontiers in Zoology

ISSN: 1742-9994