Warum schwimmt mein Fisch mit dem Kopf nach unten?
Eine mögliche Ursache sind plötzliche Temperaturänderungen. Aber auch andere Ursachen, wie bakterielle Infektionen sind möglich. Parasiten sind Ursache für die Samtkrankheit, bei der befallene Fische oft auf den Boden sinken. Seltener sind Fadenwürmer (Nematoden) oder Sporozoen die Ursache.
What did Endler’s experiment prove?
Being a scientist, Endler did what scientists do when they make an observation they can’t explain – he devised an experiment to understand why these guppies were so different. Endler moved guppies from below waterfalls were there were lots of predators to places above the waterfalls where there were no or few predators and waited for many months.
How did Endler move the guppies from below the waterfall?
Endler moved guppies from below waterfalls were there were lots of predators to places above the waterfalls where there were no or few predators and waited for many months. When he came back he discovered that the guppies in places without predators had significantly more color than the guppies below waterfalls where all the predators were.
What is the story of the GUPPY?
A small fish with a big story to tell. They may be tiny but Trinidadian guppies are the rockstars of evolutionary science. They live in steep mountain streams that flow across many waterfalls before they reach the ocean. These waterfalls are important barriers, keeping predators out of parts of the stream.
What can we learn from guppies about evolution?
It turns out the humble guppy has a lot to teach us about evolution. They may be tiny but Trinidadian guppies are the rockstars of evolutionary science. They live in steep mountain streams that flow across many waterfalls before they reach the ocean. These waterfalls are important barriers, keeping predators out of parts of the stream.