Summary
We conducted daily censuses on a marked population of the damselflyCalopteryx maculata for two complete breeding seasons to document the reproductive tactics of individual males. Overall, 78% of the 600 males studied defended territories and 14% of those territorial males were also observed engaged in sneaking behaviour on some days. When sneaking, males did not defend territories but attempted to steal females from other males' territories. Sneakers were usually previously successful territorial males who emerged early in the season and began sneaking relatively late in their lives (Fig. 2). Thus the adoption of sneaking was conditional and related to both male age and population density. We suggest that sneaking, in this species, is a “make the best of a bad situation” tactic adopted when intense male-male competition forced older males to abandon territoriality. Thus, sneaking allowed males with declining resource holding potential to prolong their reproductive careers after they were no longer able to hold a territory.
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Forsyth, A., Montgomerie, R.D. Alternative reproductive tactics in the territorial damselflyCalopteryx maculata: sneaking by older males. Behav Ecol Sociobiol 21, 73–81 (1987). https://doi.org/10.1007/PL00020230
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DOI: https://doi.org/10.1007/PL00020230