The ones that fend off their brethren are better adapted to their environment than those who let themselves be eaten. It may be a grotesque environment, but it's still evolution.
Well, Shitheads attitude, while effective for survival isn't effective in the bigger picture, since other creatures would be more willing to kill them.
Basically yukkuri survival is more about their numbers and the recent raise of Dosus, specially shithead or scum dosus who are willing to follow the selfish and agressive ways of the shitheads.
So i would think it's a form of Anti-Evolution, since more agressive and selfish =/= assured survival, it may make them more prone to not survive with their current capacities. Specially if you are as weak as the yukkuris, usually smarter and more cautious nature would be better evolutive traits for long term and bigger picture survival. Again, without the dosus, and their reproduction rates.
Kinda compare to the small mammals in the time of dinosaurs and after them. Those traits and the "Dinosaur Killing incident" assured them to be able to evolve and prevail. If Small Mammals were as agressive and stupid as yukkuris, specially without the birth rates and giantic magic laser firing version of themselves, you bet they wouldn't had lasted long.
Man Kodoku , don't be so small-minded xP Yes , it is actually just plain evolution - an evolution that will lead to the eventual extinction of their species.
Only because of the Dosus and their bug like birth rate.
But truth be told, that only save them from average nature, if they made humanity go into a "Global Yukkuri Extermination" campaign, well, they would defeintely go extinct. And i'll be honest, that's one of the possible outcomes for the yukkuris, keep on fucking up and ruining the fun and easiness of everything in the world until mister humans say "NO MORE" and bye bye talking manjuus. Even more possible if they keep making lands barren out of overgrazing so it would be reduced to "the world or the yukkuris".
haven't you heard? Those guys are one step away from being extinct! From anons who don't give a rat's ass which yukkuri they get to kill to the shitheads taking advantage of them
Yeah, basically that would be the moment on which humanity may finally snap and erase the manjuus, when there are no more good yukkuris, only bad ones remain and taht would doom the race to face the anger of humanity out of bothering them more often than in the past out of being 100% the species now.
The only way for yukkuris to prevail beyond 100 years is either the good yukkuris lasting that long, or the bad ones being erradicated or reduced to a 20% or 30% giving complete dominance to the good ones and the numbers to back it up.
Because, the true bulk of the manjuu killers don't come from abusers, but average joes tired of their antics, unlike what some people think, pure yukkuri lovers and pure yukkuri abusers are a notorious minority.
Their rate of reproduction probably guarantees they won't become extinct... eliminating every single one of the manjuus is a pretty tall order. Although one thing I do imagine is that yukkuris could be virtually wiped out and prohibited in the wild, allowed only within certain monitored areas. The majority of them, kept for mankind's use as pets, fodder, garbage machines and stressballs.
You are understimating the murderous capacity of humanity and overstimating the durability of yukkuris Tea.
The scenario i said, would probably not be angry mobs smashing manjuus in cities and forests, but whole armies of specialists and military personal using everything they have against them, specially, all the Anti-Yukkuri stuff they may had developed as years went on, like gases, insense and other stuff.
Yukkuris really don't have a proper countermeasure against a humanity feed up of their existence and willing to wipe them out, and for humanity to go that far, yukkuris had to really go low and probably proactively ruining the fertile enviroments.
It's actually one of my theorical ends for the yukkuris, the other one being good ones starting to fight back, humans inspired by them would help them out, and the wave would be changed in favor of the good yukkuris.
Some people may not agree with it, some may, but considering the situation of the yukkuris and their lives, i don't consider it that farfetch'd when you start thinking about all the common people having to deal with them, instead of only thinking in abusers or lovers.
Plus if yukkuris go that bad, they may become candidates to Xenomorph tier (minus the level of danger, but the same enviromentally destructive capacity) or Space Locust Race of Doom tier, so that would make the humanes more willing to wipe them out.
I'm surprised no one has brought up the fact that various species of sharks have a similar practice, wherein the most developed pup(s) will devour any less-developed siblings still in the womb.