A new study out of Canada revealed a surprising side effect that hunting may have on wolves.
Researchers wanted to compare the hormone levels in wolves that often deal with hunters’ fire, versus wolves that are hunted very little. They were able to measure levels of progesterone, testosterone, and the stress hormone cortisol by looking at samples of wolf hair from different parts of northern Canada.
It turns out wolves in heavily hunted areas had higher levels of a stress hormone and higher reproductive hormones. So, they were stressed out and mating more frequently.