Size-biased dispersal prior to breeding in a damselfly

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Abstract

Dispersal is notoriously difficult to measure, so its potential population consequences are often unknown. If dispersal is density-dependent, it can act in population regulation. Adult damselflies Enallagma boreale (Zygoptera: Coenagrionidae) raised as larvae under a range of competitive regimes were individually measured and marked. Individuals that survived to reproductive maturity were either recovered at the natal pond or had dispersed to nearby water bodies. Dispersing individuals were heavier at emergence than those returning to the natal pond to breed. Therefore, an increased probability of dispersal does not appear to be a response to poor conditions in this species. © 1990 Springer-Verlag.

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Anholt, B. R. (1990). Size-biased dispersal prior to breeding in a damselfly. Oecologia, 83(3), 385–387. https://doi.org/10.1007/BF00317564

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