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| 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996 | 1995 | |
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| Wittlinger, M., Wolf, H., Wehner, R.: (2007): |
id 35 |
| Hair plate mechanoreceptors associated with body segments are not necessary for three-dimensional path integration in desert ants, Cataglyphis fortis |
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| Nørgaard, T., Henschel, J.R., Wehner, R. (2007): |
id 36 |
| Use of local cues in the night-time navigation of the wandering
desert spider Leucorchestris arenicola (Araneae, Sparassidae) |
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| Narendra A., Cheng K., Wehner R.: (2007): |
id 37 |
| Acquiring, retaining and integrating memories of the outbound distance in the
Australian desert ant Melophorus bagoti |
| The Journal of Experimental Biology 210, 570-577 |
| ABSTRACT |  | ZORA | |
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| Wehner, R.,Fukushi, T.,Isler, K.: (2007): |
id 38 |
| On Being Small: Brain Allometry in Ants |
| Brain Behav Evol 2007;69:220-228 |
| ZORA | |
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| Grah, G., Wehner, R. and Ronacher, B. (2007): |
id 88 |
| Desert ants do not acquire and use a three-dimensional vector. |
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Abstract:
Abstract
Background: Desert ants (Cataglyphis fortis) are central place foragers that navigate by means of
path integration. This mechanism remains accurate even on three-dimensional itineraries. In this
study, we tested three hypotheses concerning the underlying principles of Cataglyphis' orientation
in 3-D: (1) Do the ants employ a strictly two-dimensional representation of their itineraries, (2) do they link additional information about ascents and descents to their 2-D home vector, or (3) do they use true 3-D vector navigation?
Results: We trained ants to walk routes within channels that included ascents and descents. In
choice tests, ants walked on ramps more frequently and at greater lengths if their preceding journey also included vertical components. However, the sequence of ascents and descents, as well as their distance from nest and feeder, were not retraced. Importantly, the animals did not compensate for an enforced vertical deviation from the home vector.
Conclusion: We conclude that Cataglyphis fortis essentially represents its environment in a
simplified, two-dimensional fashion, with information about vertical path segments being learnt, but independently from their congruence with the actual three-dimensional configuration of the environment. Our findings render the existence of a path integration mechanism that is functional in all three dimensions highly unlikely. |
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| Hegedüs, R., Åkesson, S., Wehner, R. and Horvath, G. (2007): |
id 89 |
| Could Vikings have navigated under foggy and cloudy conditions by skylight polarization? On the atmospheric optical prerequisites of polarimetric Viking navigation under foggy and cloudy skies. |
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| Müller, M. and Wehner, R. (2007): |
id 90 |
| Wind and sky as compass cues in desert ant navigation |
| Naturwissenschaften (2007) 94, 589-594 |
| ABSTRACT | | ZORA | |
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| Wehner, R. (2007): |
id 91 |
| The desert ant's navigational toolkit: procedural rather than positional knowledge. |
| Proceedings of the 63rd Annual Meeting of the Institute of Navigation 2007:1-14, April 23 - 25, Cambridge, Massachusetts |
| ABSTRACT | ZORA | |
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| Wittlinger, M., Wehner, R. and Wolf, H. (2007): |
id 92 |
| The desert ant odometer: a stride integrator that accounts for stride length and walking speed. |
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