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Orientation and long-distance migration routes: an attempt to evaluate compass cue limitations and required precision

Sandberg, Roland LU and Holmquist, Björn LU (1998) In Journal of Avian Biology 29(4). p.626-636
Abstract
By computers imulationso f differentf lightr outesf or springm igratingK nots Calidris

canutusp, otentialo rientationa'ld angerz ones' werer evealedi n the equatora rea and

northo f the Arcticc ircle.A n evaluationo f the availabilityo f directionailn formation

duringm igratoryf lightsd emonstratedth e potentialh azardso f crossingt hese danger

zones. Investigationso f the directionalc onsequenceso f sun compass orientation

based upon an internalc lock in phase with local time at the departures ite showed

that such a mechanism would entail serious losses in distance and time. A simple

compensatingr uleb asedo n the rateo f changei n sun altitudew as foundt o workw ell

... (More)
By computers imulationso f differentf lightr outesf or springm igratingK nots Calidris

canutusp, otentialo rientationa'ld angerz ones' werer evealedi n the equatora rea and

northo f the Arcticc ircle.A n evaluationo f the availabilityo f directionailn formation

duringm igratoryf lightsd emonstratedth e potentialh azardso f crossingt hese danger

zones. Investigationso f the directionalc onsequenceso f sun compass orientation

based upon an internalc lock in phase with local time at the departures ite showed

that such a mechanism would entail serious losses in distance and time. A simple

compensatingr uleb asedo n the rateo f changei n sun altitudew as foundt o workw ell

both at polar latitudes and in the equator area. The magnetic compass will become

inoperativec lose to the magnetice quatora nd the poles, thus restrictingth e availability

of directional information. Orientation by stellar cues will become impossible

during spring and summer at arctic latitudes. Simulations of potential migratory

routesa lso enablede xaminationo f the requiredp recisiono f compasss ystemsa nd it

was indicatedt hat necessaryo rientationa ccuracyr equiresm ore than one directional

selectionp er long-distancef light to ensure survival.I t is concludedt hat computer

simulations of flight tracks, based on ringing recoveries, visual observations, radar

studies and satellite telemetry may be a powerful tool helping to identify problems

which require future experimental attention. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Avian Biology
volume
29
issue
4
pages
626 - 636
publisher
Federation of European Neuroscience Societies and Blackwell Publishing Ltd
external identifiers
  • scopus:0032440275
ISSN
0908-8857
language
English
LU publication?
yes
id
b928ec4d-e375-4edf-bc1c-4863c60668f4 (old id 1144959)
date added to LUP
2008-04-28 12:41:05
date last changed
2017-01-01 04:38:46
@article{b928ec4d-e375-4edf-bc1c-4863c60668f4,
  abstract     = {By computers imulationso f differentf lightr outesf or springm igratingK nots Calidris<br/><br>
canutusp, otentialo rientationa'ld angerz ones' werer evealedi n the equatora rea and<br/><br>
northo f the Arcticc ircle.A n evaluationo f the availabilityo f directionailn formation<br/><br>
duringm igratoryf lightsd emonstratedth e potentialh azardso f crossingt hese danger<br/><br>
zones. Investigationso f the directionalc onsequenceso f sun compass orientation<br/><br>
based upon an internalc lock in phase with local time at the departures ite showed<br/><br>
that such a mechanism would entail serious losses in distance and time. A simple<br/><br>
compensatingr uleb asedo n the rateo f changei n sun altitudew as foundt o workw ell<br/><br>
both at polar latitudes and in the equator area. The magnetic compass will become<br/><br>
inoperativec lose to the magnetice quatora nd the poles, thus restrictingth e availability<br/><br>
of directional information. Orientation by stellar cues will become impossible<br/><br>
during spring and summer at arctic latitudes. Simulations of potential migratory<br/><br>
routesa lso enablede xaminationo f the requiredp recisiono f compasss ystemsa nd it<br/><br>
was indicatedt hat necessaryo rientationa ccuracyr equiresm ore than one directional<br/><br>
selectionp er long-distancef light to ensure survival.I t is concludedt hat computer<br/><br>
simulations of flight tracks, based on ringing recoveries, visual observations, radar<br/><br>
studies and satellite telemetry may be a powerful tool helping to identify problems<br/><br>
which require future experimental attention.},
  author       = {Sandberg, Roland and Holmquist, Björn},
  issn         = {0908-8857},
  language     = {eng},
  number       = {4},
  pages        = {626--636},
  publisher    = {Federation of European Neuroscience Societies and Blackwell Publishing Ltd},
  series       = {Journal of Avian Biology},
  title        = {Orientation and long-distance migration routes: an attempt to evaluate compass cue limitations and required precision},
  volume       = {29},
  year         = {1998},
}