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- W2313472913 abstract "Toft (1989) established that males of the bee fly Lordotus pulchrissimus gather daily in aerial swarms on stabilized dunes on the north shore of Mono Lake, Mono Co., California, during August. This paper provides data on female demography and distribution, copulations, and habitat characteristics and evaluates the mating system of L. pulchrissimus. Females emerged four or five days later than males, on average, and emerged for ca. 20 d beginning the first week of August, more than half the season of adult activity (30 to 40 d). Females appeared to have a life expectancy of about 10 to 14 d, somewhat longer than males, and to mate only once, within three days of eclosion. At peak abundance, approximately when females stopped emerging, females occurred at a density of five per ha. Individual females ranged over an area of 60 to 100 m in diameter, on average, during a 10 to 14-d period. Although sizes overlapped considerably, females were on average smaller than males. Individuals found in copulation were larger than individuals in the general population; this difference was significant for males but not females. These data suggest intrasexual selection favoring large males, and in addition, there was weak tendency toward size-assortative mating. Copulations lasted up to 10 min and most occurred in a half-hour period around 1100 hours, Pacific Daylight Time, when the peak number of males occurred in the aerial swarms (Toft 1989). Swarms of male L. pulchrissimus did not occur where resources for females or their offspring were found in greater abundance than in the habitat at large, nor was there any obvious encounter convention such as attraction to hill tops. I conclude that L. pulchrissimus exhibits lek polygyny and fits the scenario proposed for the evolution of this mating system in insects." @default.
- W2313472913 created "2016-06-24" @default.
- W2313472913 creator A5011612471 @default.
- W2313472913 date "1989-03-01" @default.
- W2313472913 modified "2023-10-18" @default.
- W2313472913 title "Population Structure and Mating System of a Desert Bee Fly (Lordotus Pulchrissimus; Diptera: Bombyliidae). 2. Female Demography, Copulations and Characteristics of Swarm Sites" @default.
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- W2313472913 doi "https://doi.org/10.2307/3565297" @default.
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