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Information from the geomagnetic field triggers a reduced adrenocortical response in a migratory bird


, : Information from the geomagnetic field triggers a reduced adrenocortical response in a migratory bird. Journal of Experimental Biology 212(18): 2902-2907

Long-distance migrants regularly pass ecological barriers, like the Sahara desert, where extensive fuel loads are necessary for a successful crossing. A central question is how inexperienced migrants know when to put on extensive fuel loads. Beside the endogenous rhythm, external cues have been suggested to be important. Geomagnetic information has been shown to trigger changes in foraging behaviour and fuel deposition rate in migratory birds. The underlying mechanism for these adjustments, however, is not well understood. As the glucocorticoid hormone corticosterone is known to correlate with behaviour and physiology related to energy regulation in birds, we here investigated the effect of geomagnetic cues on circulating corticosterone levels in a long-distance migrant. Just as in earlier studies, juvenile thrush nightingales (Luscinia luscinia) caught during autumn migration and exposed to the simulated geomagnetic field of northern Egypt increased food intake and attained higher fuel loads than control birds experiencing the ambient magnetic field of southeast Sweden. Our results further show that experimental birds faced a reduced adrenocortical response compared with control birds, thus for the first time implying that geomagnetic cues trigger changes in hormonal secretion enabling appropriate behaviour along the migratory route.

US$19.90

PMID: 19717671

DOI: 10.1242/jeb.033332


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Nantsupawat, N.; Lane, P.; Siangpraipunt, O.; Gadwala, S.; Nugent, K., 2016: Gait Characteristics in Patients With Chronic Obstructive Pulmonary Disease. Patients with chronic obstructive pulmonary disease (COPD) have reduced gait speeds and more frequent falls. We analyzed gait characteristics and fall risk in these patients using video recordings and questionnaires to determine if these patients...

Strasser K., 1971: On diplopoda of yugoslavia. Senckenbergiana Biologica 52(3-5): 313-345

Jiang, J., 2006: Regulation of Hh/Gli signaling by dual ubiquitin pathways. The Hedgehog (Hh) signaling pathway governs cell growth and patterning in animal development. Malfunction of several pathway components, including the key transcriptional effector Ci/Gli proteins, leads to a variety of human disorders including s...

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Freites, L.F.rnandez-Reiriz, M.; Labarta, U., 2002: Lipid classes of mussel seeds Mytilus galloprovincialis of subtidal and rocky shore origin. The lipid class composition in juveniles of the mussel Mytilus galloprovincialis of rocky shore and subtidal origin were compared after transfer to a subtidal environment in the Ria de Arousa (northwest Spain). The experiment was conducted between...

Koch, A., 1982: A kinetic model for growth as a function of time and nutritional status. A mathematical model for the programmed control of growth is developed. The growth considered is that of metabolically active tissue (MAT) and fat. The model postulates that the energy available after maintenance and activity needs have been met a...

Silbernagel, Mj, 1969: Curly top virus screening service for snap bean breeders. Annual report: no 12 34-35

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Kapil R.N.; Bhatnagar A.K., 1981: Perspectives in experimental embryology. Proceedings of the International Botanical Congress 13: 51

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