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Harlequins on a Wall, late 2010

Observed: 8th November 2010 By: grant burleighgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebrates
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Description:

This is not a systematic study but the strong impression is of fewer Harlequins and sycamore aphids compared with 2009 (see previous post).
It is tempting to invoke a Lotka-Volterra type mechanism whereby depletion of aphid prey by the Harlequins in one year results in fewer Harlequins the following year. However, there are other predators around and the weather was very dry in Spring 2010.
Sycamore leaf image: 25/10/2010

Identifications
Species interactions

No interactions present.

Species with which Harlequin Ladybird (Harmonia axyridis) interacts

Comments

grant burleigh's picture

Harlequins on a wall

This Spring has so far also been quite dry, so if the Harlequin population goes up again, that might favour Lotka-Volterra. I hope to keep an eye on this, subject to other interests in the site.