?Rigid? internal timing in the circadian rhythm of flight activity in a tropical bat

Oecologia ◽  
1977 ◽  
Vol 29 (4) ◽  
pp. 341-348 ◽  
Author(s):  
R. Subbaraj ◽  
M. K. Chandrashekaran
Keyword(s):  
Circadian Rhythm ◽  
Flight Activity

scholarly journals Modeling Migratory Flight in the Spruce Budworm: Circadian Rhythm

Forests ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 877 ◽  
Author(s):  
Régnière ◽  
Garcia ◽  
Saint-Amant
Keyword(s):  
Boundary Layer ◽  
Circadian Rhythm ◽  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Flight Activity ◽  
Boundary Layer Transition ◽  
Layer Transition ◽  
Migratory Flight ◽  
Temperature Conditions ◽  
Mass Migration

The crepuscular (evening) circadian rhythm of adult spruce budworm (Choristoneura fumiferana (Clem.)) flight activity under the influence of changing evening temperatures is described using a mathematical model. This description is intended for inclusion in a comprehensive model of spruce budworm flight activity leading to the simulation of mass migration events. The model for the temporal likelihood of moth emigration flight is calibrated using numerous observations of flight activity in the moth’s natural environment. Results indicate an accurate description of moth evening flight activity using a temporal function covering the period around sunset and modified by evening temperature conditions. The moth’s crepuscular flight activity is typically coincident with the evening transition of the atmospheric boundary layer from turbulent daytime to stable nocturnal conditions. The possible interactions between moth flight activity and the evening boundary layer transition, with favorable wind and temperature conditions leading to massive and potentially successful migration events, as well as the potential impact of climate change on this process, are discussed.

The Circadian Rhythm of Flight Activity of the Mosquito Anopheles Gambiae: The Light-Response Rhythm

1972 ◽  
Vol 57 (2) ◽  
pp. 337-346
Author(s):  
M. D. R. JONES ◽  
C. M. CUBBIN ◽  
D. MARSH
Keyword(s):  
Circadian Rhythm ◽  
Phase Response Curve ◽  
Light Response ◽  
Flight Activity ◽  
Phase Shifting ◽  
Apparent Effect ◽  
Maximum Phase ◽  
Activity Peak ◽  
Mosquito Anopheles Gambiae ◽  
Normal Light

1. In sugar-fed A. gambiae females, light may affect flight activity directly or by changing the phase of the circadian rhythm; both responses depend on the phase of the rhythm. 2. The phase-response curve (1 h, 70 lux, signals given in the first cycle in DD following LD 12:12) shows a sharp swing, at about 3 h after normal light-off, from a maximum phase-delay to a maximum phase-advance, each of about 2 h. When signals are given at this time, phase re-setting is very variable; cyclical activity continues but the individuals are out of phase. 3. Phase shifting appears to be a function of the energy of the signal. A 5 min, 70 lux signal has no apparent effect. The effect of a 1 h signal increases with intensity, up to at least 500 lux, but does not appear to be significant below 10 lux. 4. Light normally inhibits flight activity, but there is a burst of activity at light-on (light-on response) if it occurs during the active half of the cycle following the initial activity peak. A vigorous light-on response occurs even at the lowest intensity used (0.3 lux).

The Circadian Rhythm of Flight Activity in the Mosquito Aedes Aegypti (L.): The Phase-Setting Effects of Light-On and Light-Off

1969 ◽  
Vol 51 (1) ◽  
pp. 59-70
Author(s):  
B. TAYLOR ◽  
M. D. R. JONES
Keyword(s):  
Circadian Rhythm ◽  
Aedes Aegypti ◽  
Flight Activity ◽  
Endogenous Rhythm ◽  
Constant Light ◽  
Phase Setting ◽  
Constant Dark

1. The circadian flight-activity of individual, sugar-fed Aedes aegypti females has been studied, using the flight-sound as an indicator of activity. 2. The activity appears to be controlled by an endogenous rhythm with a period of 22-24 hr. in constant dark and about 26 hr. in constant light. 3. Both light-on and light-off have phase-setting effects. Under favourable conditions, peaks of activity occur 13-14 hr. after light-on and 22-23 hr. after light-off. Both these peaks persist in constant dark following an LD 4:20 regime. 4. The total amount of flight-activity is correlated with the duration of light (70 lux) in the 24 hr. period.

The Effect of Light Regimes on the Circadian Rhythm of Flight Activity in the Mosquito Aedes Taeniorhynchus

1971 ◽  
Vol 54 (3) ◽  
pp. 745-756
Author(s):  
J. K. NAYAR ◽  
D. M. SAUERMAN
Keyword(s):  
Circadian Rhythm ◽  
Developmental Stages ◽  
Activity Rhythm ◽  
Activity Patterns ◽  
Flight Activity ◽  
Activity Rhythms ◽  
Light Regimes ◽  
Aedes Taeniorhynchus ◽  
First Time ◽  
Pipiens Pallens

1. The flight activity patterns of groups and individuals of sugar-fed A. taeniorhynchus females have been studied under different light regimes, by recording of flight sound as an indicator of flight activity. 2. In an LD 12:12 regime, flight activity occurs both at light-off and light-on, forming a bimodal ‘alternans’ pattern. This basic pattern of flight activity persists with a periodicity of 23.5 h under continuous DD, but under continuous LL is masked over by irregular excessive outbursts of activity. 3. The flight activity rhythm originates for the first time in the adult stage, and it is not carried over from rhythms of developmental stages. 4. Flight activity rhythms can be entrained to a new light regime within 24-36 h which is rather fast. An early light-off does not reset the phase of the rhythm, but a delayed light-off does. 5. The flight activity rhythm can be entrained to 24 h light regimes other than LD 12:12. But a single stimulus of less than 12 h is not effective in initiating the bimodal circadian rhythm. 6. Frequency demultiplication within certain limits can entrain the flight activity rhythm to 24 h. 7. This flight activity rhythm of A. taeniorhynchus is compared with the activity rhythms of Aopheles gambiae and Culex pipiens pallens. 8. It is concluded that the basic bimodal alternans pattern of flight activity is a persistent property of the circadian oscillating system, which suggests that other activity rhythms involving flight are dependent on the same rhythm.

Effect of Lithium Chloride on the Circadian Rhythm in the Flight Activity of the Microchiropteran Bat, Taphozous melanopogon

1981 ◽  
Vol 36 (11-12) ◽  
pp. 1068-1071 ◽  
Author(s):  
Ramanujam Subbaraj
Keyword(s):  
Drinking Water ◽  
Circadian Rhythm ◽  
Lithium Chloride ◽  
Flight Activity ◽  
Period Length ◽  
Quantitative Change ◽  
Qualitative And Quantitative ◽  
The Face ◽  
Free Running ◽  
Phase Angles

Abstract We have performed experiments on the influence of Li+ offered through drinking water i) on the period length (τ) of the rhythm in the flight activity of bats under LL and ii) on phase angles during entrainment under LD cycles. Bats subject to entrainment exhibited no qualitative and quantitative change in Ψ values after Li+ treatment. In contrast the ingestion of Li ions by bats under free-running conditions shortens the τ of the bat rhythm by an amount that is a function of period length prior to ingestion, τ is, thus homeostatically conserved in the face of Li administra­ tion in bats.

The circadian rhythm of flight activity ofSpodoptera exiguamales in response to sex pheromone

2015 ◽  
Vol 154 (2) ◽  
pp. 154-160 ◽  
Author(s):  
Wen-Jie Cheng ◽  
Xia-Lin Zheng ◽  
Pan Wang ◽  
Li-Lin Zhou ◽  
Chao-Liang Lei ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Sex Pheromone ◽  
Flight Activity

A circadian rhythm in adult idiopathic epistaxis?

1998 ◽  
Vol 23 (3) ◽  
pp. 280-280 ◽  
Author(s):  
Mehanna ◽  
Robinson ◽  
Gatehouse ◽  
Mcgarry
Keyword(s):  
Circadian Rhythm ◽  
Idiopathic Epistaxis

Lights Beat Melatonin for Circadian Rhythm Shift

2005 ◽  
Vol 38 (10) ◽  
pp. 19
Author(s):  
SHERRY BOSCHERT
Keyword(s):  
Circadian Rhythm
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