Posted on 01/19/2013 7:56:55 PM PST by SunkenCiv
Do Salmon Navigate by the Earth’s Magnetic Field?
Alaska Science Forum
Article #691
by Larry Gedney
November 23, 1984
http://www2.gi.alaska.edu/ScienceForum/ASF6/691.html
Magnetic north pole shift: NASA and Egyptians say this has happened before
http://www.examiner.com/article/magnetic-north-pole-shift-nasa-and-egyptians-say-this-has-happened-before
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Bacteria which sense the Earth’s magnetic field (”Simple” organisms?)
EurekAlert! | November 20, 2005 | Staff
Posted on 11/22/2005 2:15:15 PM PST by DaveLoneRanger
http://www.freerepublic.com/focus/news/1526963/posts
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GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach | |
Just adding to the catalog, not sending a general distribution. |
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Wonder what it is that Leeds them back.
Haggis we’ll never know for sure.
I think the bigger puzzle is how do they find there way to Norway and Greenland?
They can be imprinted on their journey with the route they took but they have never been to the feeding grounds before.
On a trip to Scotland last year my party walked across a bridge and observed salmon going/jumping back up a river. Don’t ask me what river.
FYI, PBS is currently running a superb series on volcanoes. A recent episode dealt with how certain Alaskan salmon adapted some 2000 y ears ago, when a volcano erupted and completely blocked their access to the rivers and streams where they spawned. They were somehow, immediately able to modify their behavior. The episode should be on the PBS website.
The Royal Mail?
I have thought about the salmon's journey for years without arriving at your now-obvious question. Nice work.
A corollary of your question is “Why do hatchery raised salmon mingle with returning wild salmon since the hatchers have never experienced the birth stream of the wilds?”
Monarch butterfly migrations are also a wonder. Several generations are involved with the total trip.
GPS
A sixth sense that humans have lost or never needed
I’m irresistably attracted to the smell of pizza... :’)
What river?
Thanks ken5050!
Thanks Pontiac.
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