1,721,270 research outputs found
Biological significance of distinguishing between similar colours in spectrally variable illumination: bumblebees (Bombus terrestris) as a case study
No full textPhotoreceptor spectral sensitivity in island and mainland populations of the bumblebee, Bombus terrestris
No full textBumblebees (Bombus terrestris) sacrifice foraging speed to solve difficult colour discrimination tasks
No full textSpectral sensitivities of photoreceptors and lamina monopolar cells in the dragonfly, Hemicordulia tau.
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Elements of Feed-Forward and Feedback Control in Drosophila Body Saccades
Full text linkI have developed a new experimental preparation of the fruit fly, Drosophila melanogaster. A fly is glued to a steel pin, which is held in the field between two magnets such that the fly is free to rotate about only one axis. Such "magnetically tethered" flies perform rapid yaw turns, similar to the behaviors termed "body saccades" in free flight. Saccades can be evoked by visual stimulation, in a manner suggesting that the underlying neural circuitry may be performing an angular threshold calculation. Once a saccade is initiated, however, visual feedback has very little effect on its dynamics, but rotational feedback from the haltere system plays an important role in structuring the time course of saccades. Vision is important, though, in maintaining a stable orientation in both intact flies and flies with asymmetrical wing alterations. The halteres are known to mediate responses to Coriolis forces correlated with the fly's rotations in flight, but flies with modified halteres also exhibit distorted saccade dynamics when they are not free to rotate. This suggests that the halteres may be involved in saccade initiation, although the precise mechanisms are not clear. There is preliminary evidence suggesting that the haltere strokes may be actively modulated during flight
Getting a glimpse into the sensory worlds of animals [Elektronisk resurs] : the Editors’ and Readers’ Choice Awards 2024
No full textThe Editors’ and Readers’ Choice Awards were established in 2022 to celebrate some of the outstanding articles published every year in the Journal of Comparative Physiology A. The recipients of the 2024 Editors’ Choice Awards were selected based on votes cast by the Editorial Board on articles published in 2023. In the category Original Paper, this distinction goes to ‘Views from ‘crabworld’: the spatial distribution of light in a tropical mudflat’ by Jochen Zeil (J Comp Physiol A 209:859–876, 2023); and in the category Review Article to ‘Olfactory navigation in arthropods’ by Theresa J. Steele and colleagues (J Comp Physiol A 209:467–488, 2023). The winners of the 2024 Readers’ Choice Awards were determined by the number of online accesses of articles published in 2022. In the category Original Paper, the winner is ‘Broadband 75–85 MHz radiofrequency fields disrupt magnetic compass orientation in night‑migratory songbirds consistent with a flavin‑based radical pair magnetoreceptor’ by Bo Leberecht and colleagues (J Comp Physiol A 208:97–106, 2022). In the category Review Article, the winner is ‘Magnetic maps in animal navigation’ by Kenneth J. Lohmann and colleagues (J Comp Physiol A 208:41–67, 2022), which already won the Editors’ Choice Award in 2023
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