@article {1814,
	title = {Dung pad residence time covaries with male morphology in the dung beetle Onthophagus taurus},
	journal = {Ecological Entomology},
	volume = {24},
	number = {2},
	year = {1999},
	note = {Using Smart Source ParsingArticleEnglish},
	pages = {174-180},
	abstract = {1. The immigration and emigration behaviours of Onthophagus taurus were investigated in a combination of field and laboratory experiments to examine patterns of dispersal in this species. 2. On average, the mean proportion of major males immigrating to baited pitfall traps decreased significantly with time. In contrast, the mean proportion of minor males and females did not change with time. 3. The time taken to emigrate from a dung pad differed significantly among major males, minor males, and females. This difference arose because major males spent a significantly shorter period of time residing within the dung pad. On average, more than 50\% of major males had emigrated from the dung pads after 30 h, some 4 h earlier than minor males and females. 4. When the effects of body size were controlled, major males with longer horns were shown to have longer wings. Because major males spend more time in flight, longer wings may be an adaptation to more frequent dispersal. Alternatively, longer wings in major males may compensate for the production of aerodynamically costly horns.},
	keywords = {Animalia-, Animals-, Arthropoda-, Arthropods-, Behavior-, Coleoptera-: Insecta-, dung-pad-residence-time, emigration-, immigration-, Insects-, Invertebrata-, Invertebrates-, male-, morphology-, Onthophagus-taurus [dung-beetle] (Coleoptera-): female-},
	author = {Hunt, John and Kotiaho, Janne S. and Tomkins, Joseph L.}
}
@article {1924,
	title = {An intercontinental comparison of dung beetle diversity between two mediterranean-climatic regions: Local versus regional and historical influences},
	journal = {Diversity and Distributions},
	volume = {5},
	number = {3},
	year = {1999},
	note = {Using Smart Source ParsingArticleEnglish},
	pages = {91-103},
	abstract = {The species richness of biological communities is influenced by both local ecological, regional ecological, and historical factors. The relative importance of these factors may be deduced by comparison between communities in climatically and ecologically equivalent, but geographically and historically separate regions of the world. This claim is based on the hypothesis that community processes driven by similar local ecological factors lead to convergence in species richness whereas those driven by differing regional or historical factors lead to divergence. An intercontinental comparison between the winter rainfall regions of South Africa and the Iberian Peninsula showed that overall species richness of dung beetles was dissimilar at local, subregional and regional scales in Scarabaeidae s. str. but similar at all scales in Aphodiinae. Removal of species widespread in the summer rainfall region of Africa or the temperate region of Europe (regional component) resulted in dissimilarit y in species richness of mediterranean endemics at all scales in both dung beetle taxa. However, the lines joining each set of species richness values were parallel which may indicate similarities in processes between different mediterranean climatic regions despite slight differences in latitudinal range. The dominant pattern of dissimilarity or non-convergence may be related primarily to intercontinental differences in regional biogeographical and evolutionary history (faunal dispersal, glaciation effects in relation to geographical barriers to dispersal, speciation history, long-term disturbance history). The limited pattern of similarity or convergence in overall species richness of Aphodiinae may be a chance result or primarily related to intercontinental similarities in local ecological factors.},
	keywords = {Animalia-, Animals-, Aphodiinae- (Coleoptera-), Arthropoda-, Arthropods-, Biodiversity-, Coleoptera-: Insecta-, dung-beetle (Coleoptera-), Iberian-Peninsula (Europe-, Insects-, Invertebrata-, Invertebrates-, Population-Studies, Scarabaeidae- (Coleoptera-)},
	author = {Lobo, Jorge M. and Davis, Adrian L. V.}
}
@article {2033,
	title = {Proximate determination of male horn dimorphism in the beetle Onthophagus taurus (Coleoptera: Scarabaeidae)},
	journal = {Journal of Evolutionary Biology},
	volume = {12},
	number = {1},
	year = {1999},
	note = {Jan., 1999ArticleEnglish},
	pages = {27-37},
	abstract = {The existence of discrete phenotypic variation within one sex poses interesting questions regarding how such intrasexual polymorphisms are produced and modified during the course of evolution. Approaching these kinds of questions requires insights into the genetic architecture underlying a polymorphism and an understanding of the proximate mechanisms determining phenotype expression. Here we explore the genetic underpinnings and proximate factors influencing the expression of beetle horns - a dramatic sexually selected trait exhibiting intramale dimorphism in many species. Two relatively discrete male morphs are present in natural populations of the dung beetle Onthophagus taurus (Scarabaeidae, Onthophagini). Males exceeding a critical body size develop a pair of long, curved horns on their heads, while those smaller than this critical body size remain essentially hornless. We present results from laboratory breeding experiments designed to assess the relative importance of inherited and environmental factors as determinants of male morphology. Using father-son regressions, our findings demonstrate that horn length and body size of male progeny are not predicted from paternal morphology. instead, natural variation in an environmental factor, the amount of food available to larvae, determined both the body sizes exhibited by males as adults and the presence or absence of horns. The nonlinear scaling relationship between the body size and horn length of males bred in the laboratory did not differ from the pattern of variation present in natural populations, suggesting that nutritional conditions account for variation in male morphology in natural populations as well. We discuss our results by extending ideas proposed to explain the evolution of conditional expression of alternative phenotypes in physically heterogeneous environments toward incorporating facultative expression of secondary sexual traits. We use this synthesis to begin characterizing the potential origin and subsequent evolution of facultative horn expression in onthophagine beetles.},
	keywords = {allometry-, Animalia-, Animals-, Arthropoda-, Arthropods-, body-size, Coleoptera-: Insecta-, Evolution-and-Adaptation, horn-dimorphism, Insects-, Invertebrata-, Invertebrates-, mor, Onthophagus-taurus [dung-beetle] (Coleoptera-): male-, Population-Studies},
	author = {Moczek, A. P. and Emlen, D. J.}
}
@article {2209,
	title = {Kleptoparasitism and phoresy in the diptera},
	journal = {Florida Entomologist},
	volume = {82},
	number = {2},
	year = {1999},
	note = {Using Smart Source ParsingLiterature ReviewEnglish},
	pages = {179-197},
	abstract = {Spiders, dung-feeding scarabs, social, and prey-storing insects provide predictable and concentrated sources of food for a variety of thief flies (kleptoparasites) and their larvae. Whenever waiting in the vicinity of the "host" for an opportunity to exploit its resources is more energy efficient and less dangerous than foraging among hosts, a number of intimate relationships between the fly and host may evolve. In extreme cases, flies may become long-term phoretic associates that travel with hosts even while the latter is in flight. The behaviors and ecologies of kleptoparasitic Diptera are reviewed with special attention paid to the adaptations of Sphaeroceridae phoretic upon Scarabaeidae. The mating systems of kleptoparasitic flies are influenced by the type of resource that is stolen; flies associated with predators are mostly female, while those found on scarabs are of both sexes. These differences are discussed in terms of mate location, sperm competition, and mate choice.},
	keywords = {Animalia-, Animals-, Arthropoda-, Arthropods-, Behavior-, Diptera- (Diptera-), Diptera-: Insecta-, Environmental-Sciences), Evolution-and-Adaptation, Insects-, Invertebrata-, Invertebrates-, kleptoparasitism-, m, mate-choice, Terrestrial-Ecology (Ecology-},
	author = {Sivinski, John and Marshall, Steve and Petersson, Erik}
}
