Density-dependent behaviour in Aeshna cyanea (Müller) males at the mating place (Anisoptera: Aeshnidae)
Odonatologica , Volume 17 - Issue 3 p. 205- 212
Marking experiments showed that under high male density conditions the behaviour of A. cyanea males is strongly territorial; when male density is low, long-range patrol flights without territorial attachment are observed. It is suggested that this variable behaviour is an adaptation to fluctuations in male density which maximizes mating chance.
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