scholarly journals Temperature Dependency of Wing-Beat Frequency in Intact and Deafferented Locusts

1992 ◽  
Vol 162 (1) ◽  
pp. 295-312
Author(s):  
JANE A. FOSTER ◽  
R. MELDRUM ROBERTSON
Keyword(s):  
Ambient Temperature ◽  
Locusta Migratoria ◽  
Beat Frequency ◽  
Effect Of Temperature ◽  
Wing Beat ◽  
Neural Basis ◽  
Wing Beat Frequency ◽  
Thoracic Temperature ◽  
Different Temperatures ◽  
Made In

Locusts do not regulate thoracic temperature during flight and as a result the thoracic temperature of a flying locust generally exceeds ambient temperature by 5–8 °C. Elevated thoracic temperatures were shown to affect wing-beat frequency in intact and deafferented Locusta migratoria. Tethered locusts were flown in a wind tunnel. Temperature was elevated by increasing the ambient temperature of the apparatus and by exposing flying animals to heat pulses. Electromyographic (EMG) recordings were made in deafferented locusts perfused with salines at different temperatures. Wing-beat frequency was shown to vary with thoracic temperature in both the intact and the deafferented situation. The slope of the rise in wing-beat frequency with experimental increases in thoracic temperature was similar in intact and deafferented animals. These experiments demonstrate an effect of temperature on the central flight circuitry. Further intracellular investigationsare needed to determine the neural basis of these effects.

scholarly journals Relationship of Wing Beat Frequency and Temperature During Take-Off Flight in Temperate-Zone Beetles

1989 ◽  
Vol 145 (1) ◽  
pp. 321-338 ◽  
Author(s):  
J. J. OERTLI
Keyword(s):  
Temperature Sensitivity ◽  
Beat Frequency ◽  
Temperate Zone ◽  
Wing Beat ◽  
Large Variability ◽  
Ambient Temperatures ◽  
Wing Beat Frequency ◽  
Thoracic Temperature ◽  
Before And After ◽  
Q10 Values

In 24 species of temperate-zone beetles thoracic temperatures (Tth), and wing beat frequency (n) were measured over a range of ambient temperatures (Ta) during take-off flight. The sensitivity of wing beat frequency to thoracic temperature varied greatly in different species: Q10 values ranged from 0.8 to 1.3. The wing beat frequency of beetles with higher average n was more sensitive to thoracic temperature. It is suggested that the temperature sensitivity of wing beat frequency results from temperature-dependent changes in the resonant properties of the beetle flight system rather than from changes in the temperature sensitivity of the muscle or nervous system. There was large variability in thermoregulatory precision. Beetles with higher n tended to thermoregulate more precisely than beetles with lower n. Measurements of thoracic temperature before and after flight indicated endothermic heat production during pre-flight activity, but not during the brief take-off flights.

Changes in the wing-beat frequency of bees and wasps depending on environmental conditions: a study with optical sensors

Apidologie ◽  
2021 ◽  
Author(s):  
Antonio R. S. Parmezan ◽  
Vinicius M. A. Souza ◽  
Indrė Žliobaitė ◽  
Gustavo E. A. P. A. Batista
Keyword(s):  
Optical Sensors ◽  
Environmental Conditions ◽  
Beat Frequency ◽  
Wing Beat ◽  
Wing Beat Frequency

scholarly journals Evolution of the wave: aerodynamic and aposematic functions of butterfly wing motion

2007 ◽  
Vol 274 (1612) ◽  
pp. 913-917 ◽  
Author(s):  
Robert B Srygley
Keyword(s):  
Beat Frequency ◽  
Warning Signal ◽  
Colour Pattern ◽  
Butterfly Species ◽  
Wing Beat ◽  
Butterfly Wing ◽  
Motion Cues ◽  
Wing Beat Frequency ◽  
Wing Motion ◽  
Heliconius Cydno

Many unpalatable butterfly species use coloration to signal their distastefulness to birds, but motion cues may also be crucial to ward off predatory attacks. In previous research, captive passion-vine butterflies Heliconius mimetic in colour pattern were also mimetic in motion. Here, I investigate whether wing motion changes with the flight demands of different behaviours. If birds select for wing motion as a warning signal, aposematic butterflies should maintain wing motion independently of behavioural context. Members of one mimicry group ( Heliconius cydno and Heliconius sapho ) beat their wings more slowly and their wing strokes were more asymmetric than their sister-species ( Heliconius melpomene and Heliconius erato , respectively), which were members of another mimicry group having a quick and steady wing motion. Within mimicry groups, wing beat frequency declined as its role in generating lift also declined in different behavioural contexts. In contrast, asymmetry of the stroke was not associated with wing beat frequency or behavioural context—strong indication that birds process and store the Fourier motion energy of butterfly wings. Although direct evidence that birds respond to subtle differences in butterfly wing motion is lacking, birds appear to generalize a motion pattern as much as they encounter members of a mimicry group in different behavioural contexts.

Automated electronic approaches for detecting disease vectors mosquitoes through the wing-beat frequency

2019 ◽  
Vol 217 ◽  
pp. 767-775 ◽  
Author(s):  
Diego A.A. Santos ◽  
Joel J.P.C. Rodrigues ◽  
Vasco Furtado ◽  
Kashif Saleem ◽  
Valery Korotaev
Keyword(s):  
Beat Frequency ◽  
Disease Vectors ◽  
Wing Beat ◽  
Wing Beat Frequency

scholarly journals Insect wing-beat frequency automatic extraction and experimental verification with a Ku-band insect radar system

2019 ◽  
Vol 2019 (21) ◽  
pp. 7973-7976
Author(s):  
Tianran Zhang ◽  
XiangRong Liu ◽  
Cheng Hu ◽  
Rui Wang ◽  
Changjiang Liu ◽  
...  
Keyword(s):  
Experimental Verification ◽  
Beat Frequency ◽  
Radar System ◽  
Automatic Extraction ◽  
Wing Beat ◽  
Insect Wing ◽  
Wing Beat Frequency ◽  
Ku Band
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