Abstract
Since the time of Kopéc [19,20] when the idea of activation hormone was produced by the neurosecretory cells of insects, the insect endocrinologists had taken much pains in exploring the various events of development and growth in insect life. The ubiquity of neurosecretion and significance of endocrine structure in metabolism of insect are now very well established. A few events of insect physiology such as moulting, tanning, excretion and maturation of gonads are well explored and understood, but the endocrine regulation of haemogram is an occult of insect physiology which needs profound investigations. Surprisingly insect endocrinologists have not developed much interest to reveal this problem. However, a great deal of data has been accumulated to explain the qualitative and quantitative changes in the haemocyte population of various species of insects during growth and development. Much has been written about the effects of injury or trauma, starvation, sex, diapause, infection or injection of particulate and nonparticulate materials on the total and differential haemocyte counts. The humoral control of insect blood cell populations was reviewed by Crossley [5]. He assumed that the changed numbers of circulating haemocytes are the result of a dynamic balance between four factors: (a) mitosis of circulating haemocytes, (b) death or fragmentation of circulating haemocytes, (c) release or retention of haemocytes at haemocytic reservoirs and (d) release of sessile haemocytes from haemocytopoietic tissues. These postulations are very convincing but we could not gather much evidence to prove the interrelationship between endocrine and the above factors.
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© 1986 Springer-Verlag Berlin Heidelberg
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Pathak, J.P.N. (1986). Haemogram and Its Endocrine Control in Insects. In: Brehélin, M. (eds) Immunity in Invertebrates. Proceedings in Life Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-70768-1_5
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DOI: https://doi.org/10.1007/978-3-642-70768-1_5
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