Posted by:
Sam Squatch
(
)
Date: May 31, 2025 03:12AM
https://journals.sagepub.com/doi/10.1177/00359157730661P202In summary, take healthy mice a give them an abundance of space, food, no predators or disease, and everything they could need: a mouse utopia.
At first the population doubles rapidly. Then it abruptly slows, not because of lack or overpopulation, just over crowding. They don't want to spread out. They all crowd together.
Since death is rare, there are too many mice for the social roles. Some of the males are sort of outcast and lethargic. They live in gangs, sometimes attacking, sometimes being attacked. But not participating in any normal roles.
As time goes in the males stop defending territory and begin abandoning the masculine roles. The female mice begin to the take on the male roles including defending territory. As the become more aggressive, out of necessity, they also end up become more aggressive with their offspring. They sometimes harm them, move often and sometimes leave them behind, and bear less offspring.
What is interesting about the decline in births is that it isn't just less conception. It isn't just social. Even when the females conceive they have more miscarriages and fetal reabsorption. They physically can't have as many children!
Eventually everything breaks down. Some of the males abandon society all together. They spend their time alone in apartments eating and preening. Homosexual behavior also begins.
Eventually no more babies are born. It starts sooner than one might expect in the experiment. Eventually all the mice are dead. The experiment burns itself out.