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How did they appear upstream?

• wil421 2mo ago
  There’s a stream in my back yard that doesn’t hold fish over the winter because it’s too shallow/cold. A large property near me has a pond that overflows into my stream. The fish survive in the deeper waters of the pond and spring rain usually washes fish eggs or even fish into my stream. They gather in the rocks in my backyard near the storm drain. Alpine lakes are fed by snow met. There’s not going to be fish eggs on the snowpack that melts into the lake.
  • kakacik 2mo ago
    You yourself wrote in this thread: > 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.
• ShinyLeftPad 2mo ago
  A tornado?
• pvaldes 2mo ago
  Swimming upstream is what brown trouts do all the time. 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.