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chiruochiba t1_iqs7crw wrote

The study methods detailed in the scientific article were very interesting to read about.

https://onlinelibrary.wiley.com/doi/full/10.1111/eva.13476

I'm wondering why they only studied male frogs. Is there a pigment difference between males and females? Were males simply easier to find?

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numb3rb0y t1_iqt7wm8 wrote

Hyla arborea are very difficult to sex visually, males and females are externally pretty identical when they're not inflating their vocal sac, either you very closely examine their inner forelimbs for nuptial pads or you wait for them to call. It says they collected reproductive males during breeding season so I guess they captured calling frogs.

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Hedge89 t1_iqtmrtz wrote

Males are easier to find - they sampled them by basically going out at night in the breeding season and locating them by sound, likely the easiest and most efficient way to quickly find sufficient frogs for study.

>In total, we examined 189 H. orientalis adult males, captured during active calling from 10 PM to 1 AM.

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jazzman7838 t1_iqu1fr8 wrote

Yup. Frogs are easy to find by sound. Not so easy by sight.

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