My first question in this forum so if I have made a mistake I apologize in advance.
My World is Earth, but it's changed based on the following four premises.
In 1000 AD a virus killed 90% of all males of every animal species.
The females were immune but benefited with longer lifespans (four to five times normal) and immunity to all diseases.
90% of all male newborns die shortly after birth since the virus struck worldwide.
It's now around 1800 AD
Without considering the impact on Humans:
Question: Would the wild animal populations be able to maintain sustainable populations? Would predation make it impossible for wild species to survive?
My assumption is that even one male in ten can still inseminate as many as ten males could, so while population drops, the longer lifespans, and continued breeding maintains smaller but still sustainable populations. I'm not sure of the "math" when it comes to predation.
I received a lot of great feedback, which was instrumental in tuning of the world. Thanks to all those who replied.
In the world I'm building, which is our Earth, a meteor strikes the west coast of north America in 1000 AD. This is a transpermia event in which a kind of virus from some other distant world (far, far away and a long time ago) infects all mammals. The virus weaves itself into the Y chromosome in the germ cells (sperm) so males only pass it to male offspring. It doesn't do anything to the adult host, only its descendants. The virus can infect cross-species and as it does it carries with some of the DNA of the infecting host. This DNA is then somehow incorporated into of the germ cells which are then passed on to male infants.
The virus makes somewhat random attempts to weave in the genetics it carried from the original host to the offspring of the infected resulting in mutations most of which results in miscarriages or death after the birth of the offspring of the male. Those male offspring that survive are chimeras - a mix of phenotypes from different species. The result might be as simple as a horse that grows deer antlers, or it can be far more disturbing.
Again, most of the mutations are fatal, but the virus isn't completely random and does attempt to make changes in line with natural development. When it hits on a success - a male that survives and in turn breeds - it preserves what works but will add some changes to its own offspring.
All the mammals that come in contact with each other exchange chimera viruses resulting in more and more diversified phenotypes in the offspring.
So, for anyone one who was curious or wants to provide more feedback, there you go.
Thanks again to everyone. I'll do my best to help others in the same way in this community.