Forum DhammaCitta. Forum Diskusi Buddhis Indonesia
Komunitas => Kafe Jongkok => Topic started by: cumi polos on 23 July 2015, 08:41:48 AM
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(http://t3.gstatic.com/images?q=tbn:ANd9GcS5a8E05vmJ6YG5dCVVvVtzxO34gu5dMJpiC8qhhle5joMOoKt8jQ)
How do salmon know to go to the ocean in the first place?
We don't know. They must have a genetic cue to head downstream when their bodies are ready to change to a saltwater environment (they are called salmon smolts when their bodies change and they migrate to the ocean).
How do salmon know where their home is when they return from the ocean?
We think they can tell directions in the ocean by the earth's magnetic field acting like a compass. When they find the river they came from they start using smell to find their way back to their home stream. They build their "smell memory-bank" when they start migrating to the ocean as young fish.
PLZ share anything about salmon....specially why the salmons will back HOME to lay eggs and die ?
bgitu GIGIH, salmon yg hanya sekali mengenal tempat lahirnya akan kembali setelah sekian ribu km...dan tahun...utk BERTELUR ...
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(http://www.seymoursalmon.com/wp-content/uploads/2015/03/lifecycle.gif)