Effects of feeding on the circadian rhythm of Ceratophyllus s. sciurorum (Siphonaptera: Ceratophyllidae).
Circadian rhythm in newly emerged blood-fed individuals of the flea Ceratophyllus s. sciurorum was studied in a constant environment, using an insect activity monitor. The results of trials run continuously over seven days confirmed the finding that C. s. sciurorum has a self-sustaining clock. Statistical tests confirm that feeding weakens the rhythm but does not eliminate it. There was a significant difference in the mean activity between the fed and unfed fleas, reflecting the difference in the number of hours over which this activity took place. A possible commercial application for the monitor and also for the method of analysis is discussed.
Clark
F
F
Department of Biology, University of Leicester, UK.
Deadman
D
D
Greenwood
M
M
Larsen
K
K
Pudney
S
S
D000818:Animals; D002940:Circadian Rhythm; D005247:Feeding Behavior; D005260:Female; D051381:Rats; D005423:Siphonaptera / Q000502:physiology*