Scarab Beetles of the Genus Onthophagus Latreille North of Mexico (Coleoptera: Scarabaeidae)

Howden, Henry F.; Cartwright, Oscar Ling

doi:10.5479/si.00963801.114-3467.1

Cited by 87 publications

(76 citation statements)

References 2 publications

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“…First, a history of intense competition for ephemeral food resources may have favored specializing on novel dung sources (Hanski and Cambefort 1991;Davis and Sutton 1997), potentially leading to habitat isolation. Today, many Onthophagus species show strong and specific dung preferences, and extant species feed on a tremendous breadth of dung sources (e.g., deer, antelope, marmot, horse, monkey, tapir, agouti, elephant, packrat, kangaroo, prairie dog, sloth, toad); a few species have even colonized fruit, fungi, and carrion (Howden and Cartwright 1963;Howden and Young 1981;Davis and Sutton 1997).…”

Section: Natural History Of Onthophagus Beetlesmentioning

confidence: 99%

“…With more than 2000 species already described, Onthophagus is the largest genus of beetles, and one of the most species-rich genera of life on Earth (Howden and Cartwright 1963;Matthews 1972;Howden and Gill 1993). Onthophagus is considered by taxonomists to be a modern dung beetle genus that diversified in the Cenozoic, most likely in the Oligocene (approximately 23-33 million years ago) coincident with the expansion of grassland habitats and the radiation of mammals (Darlington 1957;Cambefort 1991b;Davis et al 2002).…”

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confidence: 99%

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Diversity in the Weapons of Sexual Selection: Horn Evolution in the Beetle Genus Onthophagus (Coleoptera: Scarabaeidae)

Emlen

Marangelo

Ball

et al. 2005

Evol

116

195

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Abstract. Both ornaments and weapons of sexual selection frequently exhibit prolific interspecific diversity of form. Yet, most studies of this diversity have focused on ornaments involved with female mate choice, rather than on the weapons of male competition. With few exceptions, the mechanisms of divergence in weapon morphology remain largely unexplored. Here, we characterize the evolutionary radiation of one type of weapon: beetle horns. We use partial sequences from four nuclear and three mitochondrial genes to develop a phylogenetic hypothesis for a worldwide sample of 48 species from the dung beetle genus Onthophagus (Coleoptera: Scarabaeidae). We then use these data to test for multiple evolutionary origins of horns and to characterize the evolutionary radiation of horns. Although our limited sampling of one of the world's most species-rich genera almost certainly underestimates the number of evolutionary events, our phylogeny reveals prolific evolutionary lability of these exaggerated sexually selected weapons (more than 25 separate gains and losses of five different horn types). We discuss these results in the context of the natural history of these beetles and explore ways that sexual selection and ecology may have interacted to generate this extraordinary diversity of weapon morphology.Key words. Adaptive radiation, beetle horns, character divergence, male competition, Onthophagus, phylogeny, sexual selection, weapons.Received October 18, 2004. Accepted January 23, 2005 The history of life has been accentuated by several spectacular evolutionary radiations (Darwin 1871;Simpson 1949;Rensch 1959), and character divergence within these radiations frequently involves the exaggerated structures of sexual selection (Darwin 1871; West Eberhard 1983; Andersson 1994). The Hawaiian radiation of drosophilid flies, for example, has resulted in more than 900 extant species that differ most conspicuously in the wing patterns and courtship displays of males (Carson 1979;Templeton 1979;Kaneshiro and Boake 1987;Hoy et al. 1988;Kaneshiro 1988;Kambysellis et al. 1995). Similarly, radiations of birds-of-paradise, pheasants, and African Great Lake cichlids all involve the ornaments and displays of males (Beebe 1953;Gilliard 1969;Dominey 1984;Diamond 1986;Turner 1994;Deutsch 1997;Prum 1997;Frith and Beehler 1998; van Oppen et al. 1998). In fact, for a great many animals, the exaggerated structures of sexual selection display an evolutionary lability far surpassing that of other, not sexually selected structures (Darwin 1871;Geist 1966Geist , 1978Gilliard 1969; West-Eberhard 1983; Andersson 1994).Diversification of the ornaments and displays of mate choice is understandable-even expected. Numerous studies suggest that female choice can drive rapid divergence among populations (Lande 1981; West Eberhard 1983;Kaneshiro and Boake 1987;Endler and Houde 1995; van Oppen et al. 1998; Boake 2000;Uy and Borgia 2000;Boughman 2001;Masta and Maddison 2002;Mendelson 2003;Coleman et al. 2004). Founder events, genetic drift, and minor...

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Section: Natural History Of Onthophagus Beetlesmentioning

confidence: 99%

mentioning

confidence: 99%

Diversity in the Weapons of Sexual Selection: Horn Evolution in the Beetle Genus Onthophagus (Coleoptera: Scarabaeidae)

Emlen

Marangelo

Ball

et al. 2005

Evol

116

195

View full text Add to dashboard Cite

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“…Adults of this species have been recorded on cattle and horse dung (Howden and Cartwright, 1963). Like many related Onthophagus species, O. nuchicornis is a dung tunneler (MacQueen and Beirne, 1975), creating a burrow near or under a fecal source.…”

Section: Life Historymentioning

confidence: 99%

A support vector machine approach to identification of proteins relevant to learning in a mouse model of Down Syndrome

Eicher

Sinha

2017

2017 International Joint Conference on Neural Networks (IJCNN)

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“…The effects caused by brood parasites in our study areas and in other studies (e.g. Rougon and Rougon 1981), together with the occurrence of this interaction in a wide range of habitats, from northern temperate to tropical ecosystems (Howden 1955;Howden and Cartwright 1963;Hammond 1976;Klemperer 1980;Cambefort and Walter 1991;Martín-Piera and Lobo 1993), and the extent of kleptoparasites in the composition of local communities, involving as many as 10% of the species (Cambefort 1991), suggest that brood parasitism may constitute an important interaction in dung beetle assemblages. Therefore, the study of brood parasitism may open new perspectives in our understanding of population dynamics and community structure in dung beetles, as well as in diverse assemblages of insects and vertebrate animals.…”

Section: Parasite-host Interaction: Effects On Host Reproductive Successmentioning

confidence: 96%

Effects of brood parasitism on host reproductive success: evidence from larval interactions among dung beetles

González‐Megías

Sánchez‐Piñero

2003

Oecologia

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This paper investigates the effect of brood parasitism in a dung beetle assemblage in an arid region of Spain. The study was conducted during the spring season (March-May 1994-1998) using mesh cylinders buried into the ground, filled with sand and with sheep dung on top. We quantified the proportion of nests containing larvae of parasitic beetles and their effect on host larvae survival. Experiments on the effect of parasitic larvae on host-larvae survival were conducted by placing scarab brood masses (raised from captive scarabs in the laboratory) in containers with and without aphodiid larvae. During the spring, dung desiccation is rapid, preventing aphodiids nesting in the dung, and forcing these species to adopt brood parasitism as a nesting strategy. Parasitic aphodiids were found in 12-47% of scarab nests of three species. The incidence of brood parasitization was positively related with the number of brood masses contained in the nests, being also higher in the most abundant species. Field data and experiments showed that brood parasites significantly reduced host larvae survival from 74.8% in non-parasitized nests to 8.8% in parasitized nests. Because different rates of nest parasitization and mortality were caused by parasites, brood parasitism had a differential effect on different host species. Thus, brood parasitism constitutes an important mortality factor reducing the reproductive success of the host species and potentially affecting the beetle abundance in the area.

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Scarab Beetles of the Genus Onthophagus Latreille North of Mexico (Coleoptera: Scarabaeidae)

Cited by 87 publications

References 2 publications

Diversity in the Weapons of Sexual Selection: Horn Evolution in the Beetle Genus Onthophagus (Coleoptera: Scarabaeidae)

Diversity in the Weapons of Sexual Selection: Horn Evolution in the Beetle Genus Onthophagus (Coleoptera: Scarabaeidae)

A support vector machine approach to identification of proteins relevant to learning in a mouse model of Down Syndrome

Effects of brood parasitism on host reproductive success: evidence from larval interactions among dung beetles

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