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Oösorption in Nasonia vitripennis (Hymenoptera: Pteromalidae)
Author(s) -
King P. E.,
Richards J. G.
Publication year - 1968
Publication title -
journal of zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0952-8369
DOI - 10.1111/j.1469-7998.1968.tb01682.x
Subject(s) - biology , sorption , pteromalidae , nasonia vitripennis , follicle , insect , longevity , fat body , medicine , hymenoptera , endocrinology , zoology , larva , ecology , parasitoid , genetics , adsorption , chemistry , organic chemistry
The process of oösorption is described. Leucine amino peptidase and esterase produced by the follicle cells remove the chorion and vitelline membrane. The oölemma grows into the oöcyte and islands of degeneration are formed. The follicle is the entity of oösorption and is isolated from adjoining follicles. Under conditions of host deprivation oösorption begins earlier in older individuals than younger ones whose fat body is still large before egg production reaches its peak. The time of onset may be correlated with the reduction in the size of the fat body following the peak of egg production. This suggestion is supported by the reduced longevity of starved older individuals compared with younger ones. Age has no effect on the rate of oösorption.