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Seasonal changes in fat content, form, state of gonads and length of adult life in the sycamore aphid, Drepanosiphum platanoides (Schr.)
Author(s) -
DIXON A. F. G.
Publication year - 1975
Publication title -
transactions of the royal entomological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0035-8894
DOI - 10.1111/j.1365-2311.1975.tb00558.x
Subject(s) - biology , diapause , aphid , nymph , first generation , reproduction , crowding , zoology , botany , ecology , population , demography , larva , neuroscience , sociology
SUMMARY1 Even when reared under similar conditions of crowding and nutrition, first and second generation adult sycamore aphids differ in their morphology and physiology. Second generation adults have a smaller abdomen, a longer gut, greater fat reserves, less developed gonads, a longer reproductive diapause and live longer than first generation aphids. 2 Second generation nymphs reared in isolation develop into adults which have less well‐developed gonads but a reproductive delay similar to that of first generation adults. 3 Crowding of second generation adults prolongs the reproductive diapause.