ppint. at pplay wrote:
> tussock asserted:
>> Joanna Rowland Stuart wrote:
>>> Tetsubo wrote:
> []
>>>>I see omnivores as the best design for an intelligent race
>>[]
>>>I agree. However if the carnivorous intelligent races generally have
>>>low populations with lots of prey available, then it's feasible.
>>>Gathering an army would be a massive undertaking and the army would
>>>have to feed off the enemy as much as possible.
>>>It's only humans that breed beyond their food supply.
>>
>> Uh, ***no***. Absolutely everything _except_ humans reproduces as hard
>> as it can at all times and a very common result is exausting their own
>> food supply. Animals *suck* at long-term planning, and having almost
>> all of your children starve to death is the _norm_.
>
> - this is not true for the big cats, and nor is it true for most pack-
> hunters; i suspect it is not true for most obligate wild carnivore
> species, as any predator species that destroys one hundred per cent of its
> possible prey species - or anything remotely resembling this - destroys
> itself.
Yes, it is true. Go google up some vids for nice footage of starving
lion cubs when it gets slightly dry. When the food gets low and they can't
keep up with the pride's attempt to guess where some prey might be, they
fall behind. And they mewl and cry, but their mothers ignore it because
slowing down would doom them all.
And that's pretty normal. Not just lions, but cheetah and leopards who
can't successfully feed their young simply abandon them to slow, pleading
starvation. Wolf cubs the same. Young animals with insufficient food get
very weak, very quick, and that's that. Then they abandon the older adults.
Then any males. Then they abandon any who slow slightly though the tiniest
thorn or scratch. Then they split the pride into smaller family groups. Just
like early humans did in tough times.
Eventually, the food comes back. Some of the prides make it, some don't.
If there's too few predator animals, the prey immediately overproduces and
starves even in good years.
Birds? Yes. Plenty of predatory species use chick #2 as a food source
for chick #1 as the feeding requirements grow, and if it's a bad year after
a couple good ones that still won't help because there's just too many
nests. The local starlings maybe fledge one in five, because we have a
growing season not quite matched to thier breeding cycle.
And even when everything's neatly in balance in ancient stable
ecosystems there's still a lot of starvation, because animals get hurt or
get a bad tooth or arthritis or cataracts or whatever and that leads to
starvation, for them and their young. Older animals don't gracefully pass in
their sleep at a specific point, they /starve to death/ because it got too
hard to stay fed, or get eaten as progressive starvation slows them.
> - i believe it's mainly in ecologically marginal territories that they
> are likely to outbreed their food supply to the point of death by
> starvation being anywhere near the norm for their young.
It's /any/ ecosystem with variation, including significant seasonal
variation. They reintroduced Wolves to the US because the Bison were locally
overbreeding and starving themselves without a predator, which was in turn
destroying the things they fed on, which was cascading in very bad ways.
> by and large the big cats spend more time sleeping, lazing, digesting,
> grooming and playing (especially females with their young)
Uh, since when is a feeding mother ... biology, that's as hungry as
she'll ever be, dude. The food is good that time of year, but she's /busy
catching it to make milk/, or feed it to the young directly.
> than hunting - which they would scarcely do, if starving.
Lioness have d4 cubs per year and breed for around six years. That's 15
cubs each. Most of them starve, a few more killed when a new male turns up,
some more by other species (lots of things opportunistically kill young
predators, including the prey species). It's math, eh, the world is not made
of lions, the /average/ lioness ends up with enough to replace her.
Lioness outside a pride almost always have all their cubs starve,
because they're less efficient, but the drive to try is still there.
Drought cycles in Africa are /mean/. Not just for the skinny people you
see on TV every few years.
>> Plants are even worse, naturally.
>
> - very few plants are obligate carnivores, and scarcely any
> are known habitually to go abroad hunting their prey.
In that plants can produce thousands of seeds all seeking the same patch
of soil and sunlight, and almost all of them eventually starve for lack of
it. Yes, plants starve too, withering and dying just like animals.
--
tussock