Considering how fast they reproduce. Let's go with conservative figure at a birth rate of 1 month/4weeks and only one parent gets pregnant using the mammalian birth. They appears to have induced ovulation, so they definitely become pregnant during copulation. Let's go with cheek rubbing and not induced ovulation but the amount of times they rub cheeks makes it certain they get pregnant within a week. Let's also say a growth rate of 1 month/4weeks to adult hood and they do not get pregnant until they single baby becomes an adult.
So it's 9 weeks before they get another child. Every 9 weeks they get pregnant and so do the child. So in 1 year and two weeks/54 weeks, the parent birth 6 children and each children birth their own and the grand children birth their own. At the end of the birthing week the number of mothers would double.
At the end of the year there would be 64 yukkuri mothers.
Ah correction, there would actually be 63 yukkuris, as the 0->9 week there was only 1 mother.
Now, if it was the stalk sort there would be 3+ yukkuri babies each time. Minimum 3 = Over 700 a year. And it goes up with a shorter pregnancy period or growth rate.
This is all under ideal circumstances. If the first koyukkuri doesn't find a mate, dies at birth, is defective, or starves, then the rate is effectively halved. Not even taking humans into account, the amount of natural predators a bouncing ball of food has makes it improbable that the population wouldn't decline at an alarming rate once introduced to this environment.
Assuming the original conservative rate of growth figure of 63 yukkuris. If only every third child survives then by the end of second year there'd be 6-7 more yukkuris. Granted there is a chance with the original parents being killed and halving that figure. That's still 3 more yukkuris than should exist.
That's why killing them is necessary, or disposing of them as in the garbage truck. Being raised as pets allow very ideal conditions unless the owners impose restrictions. You'd also have to separate the yukkuris to prevent them from cheek rubbing (preventing cheek rubbing is a form of torture to those social things) or neuter them by removal of penipeni (but then they have amazing regenerative abilities so you'd have to give them minimal food and definitely not sweets, if they're the bottomless pit types then it'd be torture to give them that little).
Predation is another matter, some have shown they can drive out local animals in sufficient mass. If they're not recognized by the animals and the entire family killed they'll turn out to be like rabbits in Australia. They're capable of eating all organic materials (in some short stories-even inorganics) though they're picky on what they eat. They also support remilya and flandres (sp?) which may also eat the smaller animals.
Finally, yukkuri population decline will never be alarming to me, raise more Kimemarus! Remilyas and flandres are still danger to other wildlife.
^Kimemarus arn't cannibalistic, so you would have to feed them. Sakuya have sharp teeth to hunt with, but are easy to catch and kill in case of overpopulation. Kimemaru are irritatingly fast, even to the real Aya. It's damn near close to impossible that a population problem could ever come to exist though. Think: 1 000 000 yukkuri randomly appear on Earth. This is the only time they are manually added to our world. They then have to deal with overpopulation, famine, water, general dumbfuckery, cannibalism, oniisans, sadistic children, mutants, factory and Akyu. 1 week later: pop = 100 000-50 000 1 week after: pop = ~10 000. Population decrease curve levels slightly, but by no means will there ever be a comeback to a level higher than this.
Putting yukkuris in a city environment would also introduce them as competition for the native urban wildlife, which yukkuris are ill-equipped to fight off.
So as this trend continues, we should hopefully see them being savaged by things like rats and feral cats. And, if this was America, coyotes.
Just to be mean, there should be alligators in the sewers.
Ya know, when I watch Discovery channel, I can't stop comparing the various critters presented with yukkuri... And I feel yukkuri are about the "power level" of amphibians. Maybe even better, with their fast reproduction.
Their chief weakness is the lack of camouflage and the tendency to announce their presence by shouting demands at everything, but the wild animals don't seem to predate on them, so outside of populated areas I think they'd do pretty well. In populated areas they'd probably be exterminated as pests. (Of course, some would be captured and used for various purposes.)
well, their remarkable ability to be brought back to life from horrendous injuries would surely be worth investigating, as they can remain conscious even after losing almost half of their insides.
I can't believe that people actually consider these creatures to be a danger to wildlife. They are mobile pastry, for fuck's sake! I bet that a shitload of omnivores would jump to the opportunity to feast on some sweet paste. And not to mention the fact that Yukkupredators like Remi or Flan are retarded, slow, flying MEATBUNS. Hello, misters wolf, wildcat and weasel!
The reason a yukkuri can be "brought back to life" is because it's insides are made of bean paste, not a huge amount of vital organs. Just put more bean paste it, stitch it up, and it's back. That's why you have to make sure a yukkuri is thoroughly obliterated before walking away.
^Yes, they are. Your point? Most hunted animals are highly mobile, unlike Yukkuri. Some of them posess formidable defensive capabilities, unlike Yukkuri. Quite a few of them are rather intelligent, unlike Yukkuri. Only creatures which are in danger of these jumping condiments are Gensokyo's slimes and bugs.
Strictly speaking, yukkuris present a threat in that they would eat so much of the available food. That would cause problems, until the other animals filled them in for the missing food.
My comment was about how, now that they're living in cities, they would have city wildlife to torment them now. And how the universe should screw them over by letting alligators live in the sewers here.
It's also the rate of their growth. They're able to put out adult soccer sized balls of jumping paste in a few month. Just read that some short stories seem to put them at about 8 babies in about three months. Their ability to eat anything would give them numbers enough to threaten animals and maybe even drive them out of local habitats.
When they do have enough numbers they become army ants.
My point was that if you work hard enough, both animals and yukkuri are walking food items.
Sure, a yukkuri may be slower, weaker, and an easier pray than any mammal. But I can't say the same about amphibians, or even reptiles and birds in some circumstances. So, if frogs manage to avoid extermination by predators, so will yukkuri.
And mammals have to pay for being strong on individual basis: the pregnancy lasts many months, and then the child has to grow and learn for many monhs more before it's completed, and then the grown up animal has to eat large amounts of food.
Yukkuris breed in a matter of days, and grow up in weeks, the child is from the start equipped with a large amount of data(the whole language, for starters) and they can eat pretty much anything.
And they're not as dumb as you make them out. For example: they build nests and take care of their young. They also have ability to speak and coordinate their actions and ability to use simple tools.
Of course, a single yukkuri is still a manju in a hostile world. But considering them as a species, they're not nearly as screwed. Zerg rush FTW.
^They also breed slower than roaches. As I argue, they can't relistically survive in the wild, be it brush or urban areas. They only ones with even the tiniest chance for survival are pets.
I also believe they can't survive as they are, especially assuming that humans are as actively cruel to them as torture fans would want you to believe.
They're slow, their skin is soft and easily broken, "shitting" as much as fanart shows would mean they purge about 50% of their body mass. They have no teeth, claws, and only rare types are poisonous. They'd be a free meal for any predator that happens to come around. Not only that, but instead of running away or hiding from things that would eat them, they announce their presence loudly, making them an easy target. That's not even counting how regularly their own kind kills each other. Even with the speedy reproduction, Yukkuri would be an endangered species in a matter of weeks, that's not even taking into account that humans torturing and killing them for kicks. They're an absolute failure as an animal, and would be destroyed quickly.
They work better as simple and weird monsters that like to take it easy. All this biology BS does nothing but make more anti-logic.
Oh, and I forgot about the "melts in water" silliness that some authors use. No amount of reproduction would help them if one of their weaknesses make up 75% of the freaking planet.
I don't know who presented some theory on their reproductive cycle, but if what you all say is right then the evidence suggests yukkuris= rapid extinction as a species.
The only ones that would remain viable would be Reimus, Marisas, Patchoulis, Alices, and most cream/sugar filled types.
I'm not sure if anko is appealing to most wild animals (I don't see why not), but I know sugary, pastry fillings cannot be eaten by predators.
Ever try feeding a dog baked beans? Isn't it too rich for them?
I'd have to guess that the reason they aren't predated in the wild as much because their filling is indigestible to most predators.
> but if what you all say is right then the evidence suggests yukkuris= rapid extinction as a species.
There's also the clear and evidence that Yukkuri biology (Talking pastries with no organs other than their respective filling) wouldn't work in any truly realistic setting. Said evidence also says that most, if not all Yukkuri-based stories and arguments (may they be moral or scientific) are silly by the nature of what they're based on.
Sure, I bring this up in many Yukkuri arguments that come up, but only because I have yet to meet someone who can prove that talking pastries being A). a threat to other species or B). Some kind of representation of all the ills of mankind is anything but stupid. It's even more glaring when people go on about how worthless yukkuri are...while said people spend hours of time and thought on what kind of mating habits, natural predators, and biological weaknesses they have. Not to mention how they go out of their way to think of creative ways to torture, kill, maim, etc.
Maybe we should take the majuu's advice to heart. :/
well actual the repreduceing speed is the amount of stuff they eat basically they could stop shiting and make more babys instand waht would go into a crazy overpopulation (also consider that they basicaly could live from grass only)and well the "Puff up" may not work on human but actuall it will work on some smaller animals animals dislike figthing the one who is bigger/louder will stay
ofcourse unless it owul be a dosu they could never beat big animals like a bear but 10 with stick or smash with bodys could easy xD beat a dog its about numbers and they may be stupid from the view of humans but they are genius from the view of animals they can build traps and use tools
and actuall the most danger would com from alice rape armys who basically do 3things
1Rap.... i mean reproduce in crazy numbers 2eat none alice ko's and all kinds of other stuff if no victims are around 3 move too next area too finde more victims and food
after they went over a number of 500 they wount be scared of a pack of wolfs and after they reached over 10000 they would be a big problem too the enviorment if they dont find others too rape eat and rape and would eat whol forests
also many predator animals will becom ill if you feed them with sweet stuff a dog becoms ill if it eats chocolat it can even die if it eats too much so no chen hunting for dogs ;P
>The population of yukkuris is directly proportional to the number of people who support the meme. Actually SonicZX, I think its indirectly proportional, lol.
Now, this is already 2 years old, but who cares, it seems fun.
Seeing as Yukkuris tend to be VERY territorial, there cannot possibly be that many yukkuris living in a single given area. We can also take out many non forrest areas in the world, as there is little to protect them from rain, and no shelter to hide. The more flat the terrain is, you can see farther, and a single yukkuri territory is easily much larger than say, a city yukkuris. However, Yukkuris that live in cities may actually be worse off than wild ones, though it depends on the relative intelligence of the yukkuris living there.
To re-ignite discussion, the figures posted up above are, IMO, too conservative. It assumes that only one baby will be born to any pair once a month.
However,generally we see batches of 3-4, sometimes up to 8 or more from a single pregnancy. In addition, stalk pregnancies are portrayed as taking at minimum, several hours, sometimes a day, and at maximum around a week.
With those figures in mind, suddenly yukkuris could have a much higher chance of survival, as even assuming a 75% cassualty rate among kos, you're still getting, at best at longest pregnancy period, a new yukkuri a week from an active pair.
Assuming ~4 per pair per pregnancy, with a new batch a month, it quickly gets scary.
*sneaking*Mwoooommmiiieeeee!!!!Yu~.....Yuuuu.....Yugyabee!!!Yuuuu!Today I'm going to the picnic!I rode in a car with a lot of friends!Akyun can't do it!!Reimu onlyWorking