Pigeon homing: new airbag experiments to assess the role of olfactory information for pigeon navigation

1991 ◽  
Vol 29 (1) ◽  
pp. 69-75 ◽  
Author(s):  
J�rg U. Ganzhorn ◽  
Joachim F. Burkhardt
Keyword(s):  
Pigeon Homing ◽  
Olfactory Information ◽  
Pigeon Navigation

The Role of Visual Familiarity with the Landscape in Pigeon Homing

Ethology ◽  
2010 ◽  
Vol 97 (1-2) ◽  
pp. 1-25 ◽  
Author(s):  
Hans G. Wallraff ◽  
Jakob Kiepenheuer ◽  
Andrea Streng
Keyword(s):  
Pigeon Homing

Some Chemical Signals in the Spawning Behavior of Rainbow Trout (Salmo gairdneri)

1973 ◽  
Vol 30 (7) ◽  
pp. 995-997 ◽  
Author(s):  
C. Newcombe ◽  
G. Hartman
Keyword(s):  
Rainbow Trout ◽  
Chemical Signals ◽  
Salmo Gairdneri ◽  
Auditory Stimuli ◽  
Spawning Behavior ◽  
Olfactory Information ◽  
Males And Females ◽  
Chemical Stimuli

In a two-choice maze ripe rainbow trout (Salmo gairdneri) of both sexes showed positive responses to chemical (probably olfactory) information. The possibility that visual or auditory stimuli influenced choice of channel in the maze was ruled out. Both males and females were strongly attracted to water taken from behind fish that were spawning and weakly attracted to the holding water of ripe fish that were not spawning. Brief speculation is offered about the role of chemical stimuli in the behavior of prespawning and spawning trout.

Modulation of Olfactory Information Processing in the Antennal Lobe ofManduca sextaby Serotonin

2008 ◽  
Vol 99 (5) ◽  
pp. 2077-2085 ◽  
Author(s):  
A. M. Dacks ◽  
T. A. Christensen ◽  
J. G. Hildebrand
Keyword(s):  
Information Processing ◽  
Antennal Lobe ◽  
Response Duration ◽  
Olfactory Information ◽  
Olfactory Acuity ◽  
Bath Application ◽  
Olfactory Stimuli ◽  
Response Thresholds ◽  
Dose Response Function

The nervous system copes with variability in the external and internal environment by using neuromodulators to adjust the efficacy of neural circuits. The role of serotonin (5HT) as a neuromodulator of olfactory information processing in the antennal lobe (AL) of Manduca sexta was examined using multichannel extracellular electrodes to record the responses of ensembles of AL neurons to olfactory stimuli. In one experiment, the effects of 5HT on the concentration-response functions for two essential plant oils across a range of stimulus intensities were examined. In a second experiment, the effect of 5HT on the ability of ensembles to discriminate odorants from different chemical classes was examined. Bath application of 5HT enhanced AL unit responses by increasing response duration and firing rate, which in turn increased the amount of spike time cross-correlation and -covariance between pairs of units. 5HT had the greatest effect on overall ensemble activation at higher odorant concentrations, resulting in an increase in the gain of the dose-response function of individual units. Additionally, response thresholds shifted to lower odorant concentrations for some units, suggesting that 5HT increased their sensitivity. Serotonin enhanced ensemble discrimination of different concentrations of individual odorants as well as discrimination of structurally dissimilar odors at the same concentration. Given the known circadian fluctuations of 5HT in the AL of this species, these findings support the hypothesis that 5HT periodically enhances sensitivity and responsiveness in the AL of Manduca to maximize efficiency when the requirement for olfactory acuity is the greatest.

The role of the Drosophila lateral horn in olfactory information processing and behavioral response

2017 ◽  
Vol 98 ◽  
pp. 29-37 ◽  
Author(s):  
Janna N. Schultzhaus ◽  
Sehresh Saleem ◽  
Hina Iftikhar ◽  
Ginger E. Carney
Keyword(s):  
Information Processing ◽  
Behavioral Response ◽  
Lateral Horn ◽  
Olfactory Information

Pigeon Homing: The Navigational Map Developed in Adulthood is Based on Olfactory Information

Ethology ◽  
2008 ◽  
Vol 114 (1) ◽  
pp. 95-102 ◽  
Author(s):  
Paolo Ioalè ◽  
Maria Savini ◽  
Anna Gagliardo
Keyword(s):  
Pigeon Homing ◽  
Navigational Map ◽  
Olfactory Information
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