[blocko]

I was also intriqued and put ~10min looking into it. This study[1] seems to suggest that although reproduction rates might increase modestly when the population is reduced, high immigration rates are the bigger factor. If anyone finds anything on the (voices disappearing)->(estrus) mechanism described above I'd like to see it, sounds really interesting.

[1] https://wildlife.onlinelibrary.wiley.com/doi/abs/10.1002/jwm...