Viewing a single comment thread. View all comments

HunterDHunter t1_islw0ts wrote

There has to be a river/stream system feeding the lake. And at some point or another that system was connected to other bodies of water. Entire parts of every continent used to be under water. There are flood events that can spread wildlife. They can also be spread by migratory birds.

19

JeegReddit44 t1_islwsfp wrote

So it's swallows then... African or European?

18

LaughCatalyst t1_ism02k8 wrote

I know a cave up a hill that's only fed by the drops from its ceiling (which are from hill run off making the cave pretty much a spring) and the cave has little fish living there that people throw food in for.

My guess is birds like you said, or some mischievous humans.

3

DarkMuret t1_ism0hib wrote

Depending on the source of the cave, it may have been a flooding event, or a water table connection

6

tworutroad t1_isn62o3 wrote

Interesting speculation. The lake I live on is spring fed. I never thought of fish egg transport through water tables.

1

stewpideople t1_isn8w43 wrote

Not entirely true. After the glaciers receded in the last ice age. Round lakes were formed. Current studies show those small pools ponds and lakes, removed from flood planes, rivers or other such events, even in lack of man. Birds, storms and land mammals long extinct would be carriers for fish eggs from one pool to another.

2