- 1.
Corpora cardiaca(CC)from immature and adult Blaberus discoidalis Serville of both sexes contained approximately equal amounts of activity for the cytochromogenic hormone (CGH), a neurohormone which stimulates cytohaem synthesis in fat body mitochondria on day 4 of adult life.
- 2.
CGH activity remained at a constant level in the CC of males during days 0 and 1 of adult life, decreased during days 2 and 3, and then returned to the original level by day 4. Female CC followed a similar pattern except that the period of low CGH activity occurred 1 day later.
- 3.
Variations in early adult feeding patterns or in daily photoperiod did not change the secretory pattern of CGH. However, injections of juvenile hormone III stimulated a precocious release of CGH on days 0–1. Thus, CGH and juvenile hormone may function in this insect as a coordinated endocrine sequence directing metabolic maturation of the fat body during early adult life.
Applications open for Workshop on vertebrate gut physiology
(update)-GutWorkshop2.jpg?versionId=4320)
Applications are now open for Inside Out: New Frontiers in the Comparative Physiology of the Vertebrate Gut, a Workshop organised by Carol Bucking and Chris M. Wood that will examine the function of the vertebrate gastro-intestinal tract. Funded places are available for early-career researchers.
In the field: an interview with Marie Dacke
-Conversation.png?versionId=4320)
Professor Marie Dacke talks about her earliest experiences of working with dung beetles in South Africa, establishing a new field site in Sardinia, Italy, and the pivotal experiments that confirmed that dung beetles can navigate by star light.
Waterproofing prevents antlion jaws from getting clogged
-Antlions.jpg?versionId=4320)
Self-cleaning waterproof coating prevents ambushing antlion mouthparts from getting clogged with sand.
Finding the right thermal limit
-Review.png?versionId=4320)
In this Review, Michael Ørsted, Lisa Bjerregaard Jørgensen and Johannes Overgaard present a framework to reconcile methodological measurements and mechanisms related to the physiology of heat stress tolerance limits, thermal injury and repair in ectotherms.
Resources for early-career researchers
Social media
