isn't that a common question?
"How do fish appear in landlocked lakes/ponds/etc"?
After digging a pond and letting it fill with rainwater/groundwater, fish appear. I don't think its because people carried them there.
(don't really know the common answer though)
Apparently some fish species do have small sticky eggs that can stick to the legs of water fowl, or even (with very small probability) pass through them intact, so this seems much more likely. Maybe a group of ducks feeding in one place then flying off to another?
It just needs to be one pregnant fish. (or many eggs)
There are many internal or quasi-internal fertilization oviparous species.
And, in sharks at least, ovoviviparous and even placental species
I see Texas multiple times and Norway zero times. What is the confusion causing your question?
https://www.raptorresource.org/2021/01/22/racheting-raptor-t...
Your eggs won't hatch until they're well away from your relatives.
I will add new genetics to the line soon, for what it's worth. It isn't an experiment to see what will happen. In most cases I never expected them to breed to begin with.
The animals dropped tend to be fish or frogs.
So if you wanted to gather plant food how do you make sure that the food you find is edible?
It's quite simple. If you know a plant is edible you take the seeds and you carry them with you and broadcast them all over the place.
The interesting part about this is that this is also a form of selective breeding, since you're choosing the edible plants over the inedible plants.
Note that you do not tend to the plants or do any form of agriculture, you're still foraging from random plants you encounter.
And yet despite that it can quite happily plan out and navigate a route that is hundreds of miles long, at roughly 20 times the speed it was designed to travel at.
I'm sitting here writing a text message to someone 1800 miles away giving them directions to a shop in Vienna and I can visualise where they need to go for that to all work, with a brain that evolved to think about "not the next hill but the one after that" distance.
The artifact can be buried by colluvial(gravity driven), or alluvial(water driven) deposition before they have a chance to decay. For more information you can consult a geomorphologist, which I am not.
They're often so well-preserved that not only can you clearly see the markings on the bark but you can sometimes make out the rings in the wood.
I remember my dad pulling out a piece that was so well preserved you could see where deer had gnawed it.
There’s fish eggs being washed everywhere during rain storms. The eggs come from upstream and wash into random places.
Alpine lakes are fed by snow met. There’s not going to be fish eggs on the snowpack that melts into the lake.
> There’s fish eggs being washed everywhere during rain storms. The eggs come from upstream and wash into random places.
Do you realize that in the summer mountains below 4000m are mostly snow-free and thawing point ie in Europe has been pushed above 5000m repeatedly during summers. Its easy to have 25C in 2500m in today's alps (ie today 22C in 2000m in Chamonix, France).
The term 'alpine lake' doesn't mean anything specific, and most are fed from rain during entire summer without any/much of snow or ice contribution.
If hunter gatherers did it 7000 years ago, should be possible to suspect it, but modern people do this things all the time. It should be easier to prove at least that they not were released in, lets say, 1780.
But I always thought the explanation was eggs randomly getting stuck to bird feet. Or maybe a bird carries a fish with eggs up there and eats it or something. Inevitably it happens though...
- Dr. Ian Malcolm
Is it unbelievable that ancient hunter-gatherers would do the same thing?
This looks like a good overview paper for interested folk: https://pmc.ncbi.nlm.nih.gov/articles/PMC3048989/
Many do have rivers; many don't. Ponds even more so don't have attached rivers.
By full, that means not being able to see the bottom of the river due to the amount of eels present.
We ate them all.
The eels made it all the way to the Sargasso Sea and back, for breeding purposes. Clearly they would not be able to get from the sea to a fully landlocked lake, with no route to the sea.
However, my point is that we had so much marine life before we cleared out the rivers, to then need the sea, to go from coastal waters to the depths of the Antarctic ocean in the quest for any fish that have survived previous quests. It is just hard for us to imagine the abundance there once was, and, therefore, the relative ease to populate an isolated alpine meadow lake with fish in former times.
Humans have decimated Earth's abundance.
In 1873, French novelist Alexandre Dumas wrote that if every egg reached maturity, within three years “you could walk across the Atlantic dryshod on the backs of cod.” In 1885, the Canadian Ministry of Agriculture said it was not only impossible to exhaust the cod supply, but even to make a noticeable dent in it. “Unless the order of nature is overthrown, for centuries to come our fisheries will continue to be fertile,” the ministry declared.
Humans find a way: https://en.wikipedia.org/wiki/Collapse_of_the_Atlantic_north...
Maybe an explanation, even a decent one, but not the only possible, not by a mile
https://en.wikipedia.org/wiki/Rain_of_animals
This is one of the biggest problems with science. Lack of imagination an partially cooked theories written as gods speak and engraved in marble forever. Is true than being selectively blind may be a requisite in the stupid publish or perish race rat.
Trouts are stubborn fishes, able to jump. If the idea is that lakes created thousand years ago, never had a hidden sink connecting karst systems, a temporary river or a specially big detaw flood that trouts could use... okay, prove it.
You can even see their scheduled fish plantings online:
Only among people who've never looked into it. Generally it happens because birds drop them and also birds occasionally get fish eggs stuck to them and move them around.
It has lots of amphibians and snakes. Rarely any birds.
Snakes are active but I doubt they eat nearly as much as the bullfrogs.
Could also introduce fish that will eat the frogs to keep them under control. Or just leave it all as-is.
https://en.wikipedia.org/wiki/Rain_of_animals
> Tornadoes and waterspouts may lift up animals into the air and deposit them miles away.