scholarly journals Do release-site biases reflect response to the Earth's magnetic field during position determination by homing pigeons?

2009 ◽  
Vol 276 (1671) ◽  
pp. 3295-3302 ◽  
Author(s):  
Cordula V. Mora ◽  
Michael M. Walker
1992 ◽  
Vol 170 (1) ◽  
pp. 127-141 ◽  
Author(s):  
CHARLES WALCOTT

Homing pigeons from our old lofts at Fox Ridge Farm in Lincoln, MA, were disoriented when released at places where the earth's magnetic field was irregular-so-called ‘magnetic anomalies’. The orientation of pigeons raised in our lofts at Cornell in Ithaca, NY, was unaffected by anomalies. Further experiments in Lincoln showed that sibling pigeons raised and trained to lofts only 2.5 km apart behaved differently when released at a strong magnetic anomaly. Pigeons from the loft situated in a magnetic gradient of 450 nT km−1 were disoriented at anomalies, whereas birds raised in a loft in a magnetic gradient of 88nT km−1 were well oriented. This suggests that the location of the home loft may play an important role in determining which cues pigeons use for their navigation, and that these cues are learned sometime after weaning from their parents at 4–6 weeks after hatching.


Author(s):  
A. Soloviev ◽  
A. Khokhlov ◽  
E. Jalkovsky ◽  
A. Berezko ◽  
A. Lebedev ◽  
...  

2011 ◽  
Vol 12 (2) ◽  
pp. 1-9
Author(s):  
A. E. Berezko ◽  
A. V. Khokhlov ◽  
A. A. Soloviev ◽  
A. D. Gvishiani ◽  
E. A. Zhalkovsky ◽  
...  

1967 ◽  
Vol 20 (1) ◽  
pp. 101 ◽  
Author(s):  
KJW Lynn ◽  
J Crouchley

Results of a study at Brisbane of individual night-time sferics of known origin are described. A propagation attenuation minimum was observed in the 3-6 kHz range. The geographic distribution of sferic types was also examined. Apparent propagation asynunetries were observed, since sferics were detected at greater ranges to the west than to the east at 10 kHz, whilst the number of tweek-sferics arising from the east was about four times that arising from the west. Comparison with European studies suggest that these asymmetries are general. These results are then " interpreted in terms of an ionospheric reflection cgefficient which is a function of the effective angle of incidence of the wave on the ionosphere and of orientation with respect to the Earth's magnetic field within the ionosphere.


2019 ◽  
Vol 287 ◽  
pp. 10-20 ◽  
Author(s):  
Kazuhiro Okayama ◽  
Nobutatsu Mochizuki ◽  
Yutaka Wada ◽  
Yo-ichiro Otofuji

2004 ◽  
Vol 218 (1-2) ◽  
pp. 197-213 ◽  
Author(s):  
Christoph Heunemann ◽  
David Krása ◽  
Heinrich C Soffel ◽  
Evguenij Gurevitch ◽  
Valerian Bachtadse

2006 ◽  
Vol 182 (2) ◽  
pp. 343-347 ◽  
Author(s):  
Jeremy N. Robinson ◽  
Andrew Coy ◽  
Robin Dykstra ◽  
Craig D. Eccles ◽  
Mark W. Hunter ◽  
...  

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