Autogeny and endocrine involvement in the reproduction of tropical flesh flies (diptera: sarcophagidae)
1976
CHADHA, GURDEEP K. | Denlinger, David L.
Autogeny is highly developed among the Sarcophagidae in tropical Africa. Unlike their temperate region relatives, the tropical species examined can mature the first batch of eggs without an adult protein meal, and they do so without the long period of delay usually seen in autogenous species. Protein deprivation, however, does reduce the number of eggs matured by about one-third. The tropical and temperate flies appear to share a common endocrine mechanism controlling egg maturation. Removal of the medial neurosecretory cells of the pars intercerebralis prevents egg maturation. Reimplantation of clusters of MNC restores the ability to mature eggs. Extirpation of the corpora allata reduces the percentage of females that mature eggs to about 70%, and the females that do mature eggs produce fewer eggs. The significant difference between the tropical and temperate species centers on the trigger that sets the neuroendocrine system into action. For the tropical species, the brain is activated immediately and does not require the trigger of a protein meal.
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