Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 48701-048701.doi: 10.1088/1674-1056/22/4/048701

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Avian magnetoreception model realized by coupling a magnetite-based mechanism with a radical-pair-based mechanism

吕琰a, 宋涛a b   

  1. a Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    b France-China Bio-Mineralization and Nano-Structures Laboratory (BioMNSL), Beijing 100190, China
  • 收稿日期:2012-08-08 修回日期:2012-10-15 出版日期:2013-03-01 发布日期:2013-03-01
  • 基金资助:
    Project supported by the State Key Program of the National Natural Science Foundation of China (Grant No. 51037006), the State Key Development Program for Basic Research of China (Grant No. 2011CB503702), and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51207155).

Avian magnetoreception model realized by coupling a magnetite-based mechanism with a radical-pair-based mechanism

Lü Yan (吕琰)a, Song Tao (宋涛)a b   

  1. a Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    b France-China Bio-Mineralization and Nano-Structures Laboratory (BioMNSL), Beijing 100190, China
  • Received:2012-08-08 Revised:2012-10-15 Online:2013-03-01 Published:2013-03-01
  • Contact: Song Tao E-mail:songtao@mail.iee.ac.cn
  • Supported by:
    Project supported by the State Key Program of the National Natural Science Foundation of China (Grant No. 51037006), the State Key Development Program for Basic Research of China (Grant No. 2011CB503702), and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51207155).

摘要: Many animal species are verified to use geomagnetic field for their navigation, but the biophysical mechanism of magnetoreception has remained enigmatic. In this paper, we present a special biophysical model that consists of magnetite-based and radical-pair-based mechanisms for avian magnetoreception. The amplitude of the resultant magnetic field around the magnetic particles corresponds to the geomagnetic field direction and affects the yield of singlet/triplet state products in the radical-pair reactions. Therefore, in the proposed model, the singlet/triplet state product yields are related to the geomagnetic field information for orientational detection. The resultant magnetic fields corresponding to two materials with different magnetic properties are analyzed under different geomagnetic field directions. The results show that ferromagnetic particles in organisms can provide more significant changes in singlet state products than superparamagnetic particles, and the period of variation for the singlet state products with an included angle in the geomagnetic field is approximately 180° when the magnetic particles are ferromagnetic materials, consistent with the experimental results obtained from avian magnetic compass. Further, the calculated results of the singlet state products in a reception plane show that the proposed model can explain the avian magnetoreception mechanism with an inclination compass.

关键词: magnetoreception, orientation, geomagnetic field, magnetic particles, radical pair

Abstract: Many animal species are verified to use geomagnetic field for their navigation, but the biophysical mechanism of magnetoreception has remained enigmatic. In this paper, we present a special biophysical model that consists of magnetite-based and radical-pair-based mechanisms for avian magnetoreception. The amplitude of the resultant magnetic field around the magnetic particles corresponds to the geomagnetic field direction and affects the yield of singlet/triplet state products in the radical-pair reactions. Therefore, in the proposed model, the singlet/triplet state product yields are related to the geomagnetic field information for orientational detection. The resultant magnetic fields corresponding to two materials with different magnetic properties are analyzed under different geomagnetic field directions. The results show that ferromagnetic particles in organisms can provide more significant changes in singlet state products than superparamagnetic particles, and the period of variation for the singlet state products with an included angle in the geomagnetic field is approximately 180° when the magnetic particles are ferromagnetic materials, consistent with the experimental results obtained from avian magnetic compass. Further, the calculated results of the singlet state products in a reception plane show that the proposed model can explain the avian magnetoreception mechanism with an inclination compass.

Key words: magnetoreception, orientation, geomagnetic field, magnetic particles, radical pair

中图分类号:  (Effects of electromagnetic and acoustic fields on biological systems)

  • 87.50.-a
02.90.+p (Other topics in mathematical methods in physics)