Sex biases in dispersal and philopatry: insights from a meta-analysis based on capture–mark–recapture studies of damselflies

Authors

  • Kirsten Beirinckx,

  • Hans Van Gossum,

  • Marc J. Lajeunesse,

  • Mark R. Forbes


K. Beirinckx, H. Van Gossum and M. R. Forbes, Dept of Biology, Carleton Univ., 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada (mforbes@ccs.carleton.ca). – H. Van Gossum, Univ. of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, Belgium. – M. J. Lajeunesse, Dept of Ecology and Evolutionary Biology, Corson Hall, Cornell Univ., Ithaca, NY 14853, USA.

Abstract

Sex-biased dispersal is well known for birds and mammals, typically by females and males, respectively. Little is known about general patterns of sex-biased dispersal in other animal taxa. We reviewed return rates for a model group of invertebrates (damselflies) and explored putative costs and benefits of dispersal by males and females. We used published capture–mark–recapture data and examined whether a sex bias existed in likelihood of recapture at least once, at both emergence and/or breeding sites. We assessed whether this metric of likelihood of recapture was indicative of dispersal or philopatry, and whether any emerging pattern(s) were consistent across damselfly families. Using a meta-analysis, we found a higher likelihood of recapture at least once for males than for females at both natal sites and breeding sites, which seemed attributable to higher female-biased dispersal, although female-biased mortality cannot be discounted particularly for some species. Sex biases in dispersal among damselflies may be understood based on sex differences in maturation rate and foraging behaviour, both of which should affect the costs and benefits of dispersing. This hypothesis may be useful for explaining patterns of dispersal in other animal taxa.

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