DIFFERENCES IN SITE FIDELITY AMONG TERRITORIAL MALES OF THE CARPENTER BEE XYLOCOPA VARIPUNCTA (HYMENOPTERA: ANTHOPHORIDAE) by JOHN ALCOCK1) (Department of Zoology, Arizona State University, Tempe, AZ 85287-1501, USA) (With 5 Figures) (Acc. 20-V-1993) Summary Lekking males of the carpenter bee Xylocopa (Neoxylocopa) varipuncta compete for landmark territories, where they are occasionally visited by receptive females. In a study conducted over three flight seasons, less than 10% of marked males qualified as long-term residents (i.e. bees that held the same hovering station for 90 min or more on at least two afternoons). However, among the small minority of long-term residents were some bees that returned to the same landmark for up to 3 hr every afternoon for several weeks. These males defeated many intruders in aerial combat during each afternoon. The hypothesis that site-faithful males were individuals of unusual resource-holding power is not supported. Long-term residents were not larger on average than short-term territory holders. Moreover, the frequency of mating by long-term residents was very similar to that of males in the general population, suggesting that long-term residents did not hold territories that were exceptionally attractive to females. Thus, the basis for site fidelity in this species remains elusive.
Behaviour – Brill
Published: Jan 1, 1993
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