Annual Review of Entomology (1977) 22, 431-450

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T.M. Peters and P. Barbosa (1977)
Influence of population density on size, fecundity, and developmental rate of insects in culture
Annual Review of Entomology 22, 431-450
Abstract: This is a general review of the effects of population density on the size, fecundity and rate of development of laboratory insect populations. Larger but fewer larvae are produced by crowded female Locusta migratoria migratorioides compared to isolated females. Grasshopper fertility is inversely proportional to the number of pairs per cage. However, isolated females of L. m. migratorioides which had been crowded as larvae showed a higher fecundity than other females, and the progeny of crowded parents were more fertile and lived longer than those of uncrowded parents. This effect can continue into a third generation, and a relationship between parental/grandparental crowding and ovariole number has been demonstrated. Crowding grasshoppers results in reduced longevity and fecundity. The percentage hatch in L. m. migratorioides is greatest in eggs from isolated females. The "group effect" on developmental rate in locusts and crickets has been demonstrated. The fatty acids and methyl esters which are present in Gryllodes sigillatus and Acheta domesticus and affect their growth are different in isolated and crowded individuals.
(The abstract is excluded from the Creative Commons licence and has been copied from Acridological Abstracts with permission by NRI, Univ. of Greenwich at Medway.)
Link to article at publishers website


Research topic(s) for pests/diseases/weeds:
rearing/culturing/mass production
general biology - morphology - evolution


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Locusta migratoria
Acheta domesticus
Gryllodes sigillatus