Seasonal variation in the migration strategies of the green lacewing Chrysoperla carnea species complex

A - Papers appearing in refereed journals

Chapman, J. W., Reynolds, D. R., Brooks, S. J., Smith, A. D. and Woiwod, I. P. 2006. Seasonal variation in the migration strategies of the green lacewing Chrysoperla carnea species complex. Ecological Entomology. 31 (4), pp. 378-388.

AuthorsChapman, J. W., Reynolds, D. R., Brooks, S. J., Smith, A. D. and Woiwod, I. P.
Abstract

1. Insect migration strategies are generally poorly understood due to the propensity for high-altitude flight of many insect species, and the technical difficulties associated with observing these movements. While some progress has been made in the study of the migration of important insect pests, the migration strategies of insect natural enemies are often unknown. 2. Suction trapping, radar monitoring, and high-altitude aerial netting were used to characterise the seasonal migrations in the U.K. of an assemblage of aphid predators: three green lacewings in the Chrysoperla carnea species complex. 3. Chrysoperla carnea sens. str. was found to be very abundant at high altitudes during their summer migration, and some individuals were capable of migrating distances of approximate to 300 km during their pre-ovipositional period. In contrast, high-altitude flights were absent in the autumn migration period, probably due to a behavioural adaptation that increases the probability that migrants will encounter their over-wintering sites. The other two species in the complex, C. lucasina and C. pallida, were much rarer, making up approximate to 3% of the total airborne populations throughout the study period. 4. The summer migration of C. carnea sens. str. was not directly temporally associated with the summer migration of its cereal aphid prey, but lagged behind by about 4 weeks. There was also no evidence of spatial association between aphid and lacewing populations. 5. The results show that to understand the population ecology of highly mobile insect species, it is necessary to characterise fully all aspects of their migration behaviour, including the role of high-altitude flights.

KeywordsEntomology
Year of Publication2006
JournalEcological Entomology
Journal citation31 (4), pp. 378-388
Digital Object Identifier (DOI)doi:10.1111/j.1365-2311.2006.00797.x
Open accessPublished as non-open access
Funder project or code510
Radar studies on the high altitude movement of aphid predators
Agricultural implications of insect population dynamics and the conservation of biodiversity
Publisher's version
Copyright license
Publisher copyright
Output statusPublished
Publication dates
Online18 Jul 2006
Publication process dates
Accepted19 Dec 2005
PublisherWiley
ISSN0307-6946

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