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Fig. 3 | Reproductive Biology and Endocrinology

Fig. 3

From: Biological sex identification in the endangered dusky gopher frog (Lithobates sevosa): a comparison of body size measurements, secondary sex characteristics, ultrasound imaging, and urinary hormone analysis methods

Fig. 3

Ultrasonography images used for DGF sex identification. Panel a depicts a trans-abdominal ultrasound scan of a male, while Panels b and c show female scans with low and high follicular development, respectively. Arrows indicate examples of follicles. Large patches of well-developed follicles are circled (panel c) to highlight the characteristic spacing and pattern of light and dark areas found in the abdomen of a gravid female. Females with low follicular development generally have smaller follicles and show less space between them (panel b)

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