Wednesday 1 July 2020

Do Not Mess With Fish 257,

and you thought fish were fun! 


well many conservationists and scientists do not, when isolated water bodies sometimes almost spontaneously are populated by fish, that had no natural route to the ponds or lakes, so how did that happen? image credit ArtTower/ Pixabay, apparently it is all down to ducks! fish eggs that get into a duck’s mouth and into its stomach get pummeled by the duck’s gizzard and then burned up by the stomach acids, and by the time that they exit the duck’s body, you would suspect that these eggs can no longer hatch, you would not expect that some will survive unscathed, but some surprisingly do! a few eggs can exit unscathed in a duck’s excrement, possibly helping to spread those fish, including invasive species, to different places, a new study finds, it’s been an “open question for centuries how these isolated water bodies can be populated by fish,” says fish biologist Patricia Burkhardt-Holm of the University of Basel in Switzerland, who was not involved with the work, this study shows one way that water birds may disperse fish, she says, how amazing, so often the discovery of an invasive specie is blamed on aquarist dumping unwanted fish into lakes and ponds, now it appears it is the ducks! for more details about this have a look over at ScienceNews.


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