[Influence of sexual maturation on cardiac activity and reactivity of Calliphora vomitoria. I. -- Cardiac activity (author's transl)].
1. Calliphora cardiac rhythm shows a regular alternation of retrograde beating phases with high frequency (fast phases) and of anterograde beating phases with low frequency (slow phases). 2. Male cardiac activity exhibits only small variations during sexual maturation. 3. In females, the ovarian development induces a decrease of slow phase duration and a variation of anterograde beat frequency (it decreases the first five days and then increases). 4. Cardiac characteristics of allatectomized or ovariectomized animals are similar to those of young females with small ovaries. 5. These results reveal an important correlation between ovarian development and many cardiac characteristics. The most important physiological factor seems to be the increase in ovary size and/or its consequences (abdominal distention).
D000818:Animals; D004175:Diptera / Q000502:physiology*; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D008297:Male; D010057:Oviducts; D010058:Oviposition; D012737:Sex Factors; D012741:Sexual Maturation
Influence de la maturité sexuelle sur l'activité et la réactivité cardiaques de Calliphora vomitoria (Diptère, calliphoridae) I. -- Contrôle de l'activité cardiaque