Reproductive Success, Phenology and Biogeography of Burying Beetles (Silphidae, Nicrophorus)

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Abstract
Burying beetles locate and bury small vertebrate carcasses which they form into brood balls for young. The ability of burying beetles to outcompete vertebrate scavengers and other carrion-feeding invertebrates for carcasses was investigated by placing dead mice on the forest floor in the North Carolina [USA] piedmont. From May to September (1984-1985), beetles discovered only about 25% of carasses on the 1st night. During midsummer of 1984, less than one-half of the carasses that beetles managed to bury produced broods. Although three species of burying beetles (Nicrophorus orbicollis Say, N. tomentosus Weber and N. pustulatus Herschel) were caught in pitfall traps baited with a large quantity of carrion, only the first two were active on mouse carasses. Compared with earlier studies in northern habitats of North America, burying beetles are less abundant, less diverse and not as successful in southeastern woodlands. Temperature-dependent competion is hypothesized to be an important determinant of burying beetle success.

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