Articles written in Proceedings – Animal Sciences
Volume 94 Issue 1 January 1985 pp 1-9
Extirpation of pars intercerebralis neurosecretory cells (PINSC) of female
Volume 94 Issue 3 June 1985 pp 207-217
Circadian rhythmicity in the timing of secretion and release of many of the neurohormones appears to be a common phenomenon in insects. Involvement of hormonal components in the locomotor activity rhythm in cockroaches, crickets etc. has not yet been proved unequivocally eventhough some of the findings along these lines support this. Many of the physiological events in insects occur only once in each individual’s life-time-gated events. Release of eclosion hormone in insects is determined both by a circadian clock and by the developmental competence of the insect. Periodic release of
Volume 96 Issue 3 May 1987 pp 185-193
In acridids during feeding, the central nervous system receives information through sensilla which in turn integrated incoming information giving the appropriate motor output. Hormones and haemolyph factors like osmotic pressure also limit meal size. In the red cotton bug,
Reproduction involving vitellogenesis, spermatogenesis, oviposition, accessory glands activity and mating behaviour is also under the regulatory control of several hormonal principles such as juvenile hormone, ecdysone, oostatic hormone etc. However, a detailed analysis of the literature available on the topic reveals that these regulatory mechanisms are tissue and species dependent.