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Magnetoreception in eusocial insects: an update.

Eliane Wajnberg¹, Daniel Acosta-Avalos, Odivaldo Cambraia Alves

¹Coordenação de Física Aplicada, Centro Brasileiro de Pesquisas Físicas, R. Xavier Sigaud, 150, Rio de Janeiro 22290-180, Brazil. elianew@cbpf.br

Journal of the Royal Society, Interface

|January 29, 2010

Summary

This summary is machine-generated.

Eusocial insects like ants and bees use Earth's magnetic field for navigation. Research reviews their magnetoreception, focusing on magnetic nanoparticles found in their bodies, particularly abdomens and antennae.

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Area of Science:

Zoology
Biophysics

Background:

Eusocial insects, including ants and bees, exhibit remarkable navigation abilities.
These insects utilize the geomagnetic field for orientation around nests and during migration.

Purpose of the Study:

To review recent behavioral experiments on magnetoreception in eusocial insects.
To examine the magnetic properties of nanoparticles within these insects.
To explore theoretical models of insect magnetosensory function.

Main Methods:

Review of behavioral experiments on magnetoreception.
Analysis of magnetic properties using magnetic techniques and electron microscopy.
Examination of nanoparticle concentrations in different body segments.

Main Results:

Ants and bees demonstrate sensitivity to geomagnetic fields.
Magnetic oxide nanoparticles (superparamagnetic to multi-domain) are present in all body parts.
Higher concentrations of nanoparticles are found in the abdomens and antennae of ants and bees.
Theoretical models for magnetosensory apparatus function have been proposed.

Conclusions:

The ferromagnetic hypothesis is a leading theory for insect magnetoreception.
Further research into neuron-rich ant antennae may reveal the magnetosensor.
The possibility of light-sensitive mechanisms is gaining interest.
Multiple compass systems likely contribute to insect orientation and navigation.