By C. Scholtz, A. Davis, U. Kryger
For a comparatively small workforce of bugs, dung beetles have attracted an inordinate volume of medical curiosity through the years. This all started with the paintings of the well-known French naturalist Jean-Henri Fabre approximately a hundred years in the past, however it the paintings of Gonzalo Halffter of Mexico, and his colleagues, who first put dung beetles at the clinical map by means of the book of 2 vital man made works. the 1st was once released in 1966 ("Natural History") and this was once by way of one other in 1982 ("Nesting and Breeding Behaviour"). A multi-authored publication on dung beetle ecology, edited through Ilkka Hanski and Yves Cambefort, was once released in 1991. those volumes are lengthy out of print and commonly unavailable. within the 18 years because the final ebook used to be released there was a gentle circulation of analysis released on dung beetle phylogeny, biogeography, physiological ecology and conservation, fields that weren't, or slightly handled within the earlier books. the present paintings synthesises and updates many of the significant components lined in these reviews, yet introduces a number of novel sections in a phylogenetic method of the common background of dung beetles. The features lined, in 5 sections, are the subsequent: evolution and ecological luck of dung beetles; physiological and behavioural ecology of dung beetles; phylogeny of the Scarabaeinae; historic biogeography of the Scarabaeinae and its actual and biotic drivers; and, conservation of dung beetles. The content material of the e-book is balanced in one of these approach that the knowledge contained in it may be of curiosity to basic entomologists, learn experts on dung beetle normal background, bugs systematists, scholars of entomology, agricultural scientists and bug conservationists.
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Additional info for Evolutionary Biology and Conservation of Dung Beetles
5) also determine nesting patterns and success. Doube et al. (1988) and Giller and Doube (1989) experimentally studied intra- and interspecific competition among 12 (eight Coprini, four Onitini) crepuscular / nocturnal tunnellers which co-exist in similar sandy soil regions of Natal, South Africa. They recorded two distinct patterns of dung burial. The coprines buried dung within 24 – 48 hours of arrival at the pat, while the onitines buried the dung over a period of 12 days. At high densities, Catharsius tricornutus, Copris elphenor and Onitis alexis removed 70-80% of the experimental pats.
This large resource was utilised most successfully by the Scarabaeinae (with about 5000 species world wide), especially in tropical regions, but also by Geotrupidae (about 150 species), exclusively in temperate regions, and Aphodiinae (with about 1000 species of dung feeders), mostly also in cooler regions, although many species have successfully invaded tropical areas and co-exist with Scarabaeinae. Some temperate and tropical groups of another unrelated beetle family, Hydrophilidae, have also exploited the dung niche, and as with the Scarabaeoidea discussed above, its members feed on the same small dung particles in wet dung in much the same way as the latter (Holter 2004).
Box-Whisker-Plots from medians (□) of relative abundance (percentages) of guilds, with 25%/75% quartiles (rectangle), minimum/maximum values (bar), outliers (o) and extremes (*). Endo=endocoprids, KleptoT= kleptoparasites of telecoprids. KleptoP=kleptoparasites of paracoprids. Tele= telecoprids. Para=paracoprids. (Redrawn from Krell et al. 2003). 52 EVOLUTIONARY BIOLOGY AND CONSERVATION OF DUNG BEETLES termined by effects of the habitat itself. Furthermore, the spatial separation of competitively inferior guilds from more superior ones may be driven by energetic constraints that enable them to persist sympatrically, with the hierarchy of competitive superiority of dwellers < tunnellers < rollers determined by increasing energetic costs and decreasing ecological tolerance.