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Egg-chamber development in the ovarioles of the fleshfly, Sarcophaga tibialis Macquart (Diptera: Sarcophagidae), during the first reproductive cycle

Published online by Cambridge University Press:  19 September 2011

Elizabeth D. Kokwaro
Elizabeth D. Kokwaro
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya
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Abstract

A polytrophic ovariole of the fleshfly, Sarcophaga tibialis Macquart, is composed of two successively maturing egg chambers, each consisting of an oocyte, an interconnected cluster of 15 nurse cells, and an enveloping layer of follicle cells. The oocyte is established at the posterior end of the egg chamber. Nurse cell differentiation is characterized by nucleolar multiplication. At 25°C the first egg generation took approximately 8 days to develop. During this period, the growth rate of the egg chamber increased with time. A dramatic increase occurred during days 4–6, and was associated with the formation of large intercellular spaces between the follicle cells as well as an accumulation of numerous yolk globules. Completion of egg-chamber development was marked by the degeneration of the cluster of nurse cells and that of follicle cells.

Keywords

Ovariesegg chamberdifferentiationdevelopmentfleshflySarcophaga tibialisoocytenurse cellsfollicle cellsyolk
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 4 , Issue 3 , September 1983 , pp. 247 - 252
Copyright
Copyright © ICIPE 1983

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