Test of magnetic sensitivity in seven species of European birds wing a cardiac nociceptive conditioning procedure

Beaugrand, Jacques (1977) Test of magnetic sensitivity in seven species of European birds wing a cardiac nociceptive conditioning procedure. [Journal (Paginated)]

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An attempt was made to show magnetic sensitivity in seven species of European birds captured during their migration. The test was done on the following species: Streptopelia turtur (N=8), Streptopelia decaocto (N=2), Corvus monedula (N=6); one individual of the following: Corvus corona c., Turdus philomelos, Turdus viscivorus, Anas penelope. Most of the individuals were first subjected to conditioning to a light stimulus. They were then subjected to differential nociceptive conditioning to 100 presentations of a magnetic stimulus (CS+) reversing the vertical Z component of the local magnetic field and 100 presentations of a control stimulus for artifacts (CS-). The two stimuli were randomly interdigited. Cardiac activity was used as an rode: of reactivity throughout the study. Results indicate that the magnetic stimuli were not used by the birds as a cue presaging the forthcoming shock. We discuss the validity of the stimuli end paradigms wed to demonstrate magnetic sensitivity in birds. These negative findings are related to possible artifactual effects explaining suggestive results in homing and zugunruhe experiments, sad to lord processing of magnetic effects without access to higher processes such r learning and arousal regulations.

Item Type:Journal (Paginated)
Keywords:magnetic sensitivity birds orientation nociceptive conditioning Streptopelia turtur decaocto Corvus monedula corona Turdus philomelos viscivorus Anas penelope
Subjects:Biology > Animal Behavior
ID Code:2920
Deposited By: Beaugrand, Jacques
Deposited On:06 May 2003
Last Modified:11 Mar 2011 08:55

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Beaugrand, J.P., 1977. Essai de mise en évidence d'une sensibilité magnétique chez sept espèces d'oiseaux européens à

1'aide d'un conditionnement nociceptif. Behavioural Processes, 2: 113-127 (en anglais).ഊNous avons tenté de mettre an évidence une sensibilité magnétique chez des oiseaux capturés durant leur migration. Le

test a été effectué sur sept espèces d'oiseaux migrateurs européens (Streptopelia turtur, N=8; Streptopelio decaocto, N=2;

Corvus monedula, N=6; un représentant des espèces suivantes: Corvus corona c., Turdus philomelos, Turdus viscivorus,

Anas penelope). La plupart des sujets ont en premier lieu été soumis à un conditionnement nociceptif à un voyant

lumineux. Ils ont ensuite été soumis à un conditionnement différentiel magnétique comprenant 100 présentations d'un

stimulus conditionnel magnétique impliquant une inversion de la composante verticale Z du champ magnétique local, et

100 présentations d'un stimulus contrôle pour les artefacts. Les deux stimuli étaient présentés dans un ordre et sur une

base de temps aléatoires. Les variations de l™activité cardiaque des sujets ont été utilisées comme variable dépendante.

Nos résultats indiquent 1'absence de conditionnement cardiaque au stimulus magnétique. Nous discutons de la validité

des stimuli et des paradigmes employés pour la mise en évidence d'une sensibilité magnétique chez les oiseaux.


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