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Diet alters male horn allometry in the beetle Onthophagus acuminatus (Coleoptera: Scarabaeidae)

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dc.contributor.author Emlen, Douglas J. en
dc.date.accessioned 2012-04-12T18:51:47Z
dc.date.available 2012-04-12T18:51:47Z
dc.date.issued 1997
dc.identifier.citation Emlen, Douglas J. 1997. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F18297">Diet alters male horn allometry in the beetle Onthophagus acuminatus (Coleoptera: Scarabaeidae)</a>." <em>Proceedings of the Royal Society B: Biological Sciences</em>. 264 (1381):567&ndash;574. en
dc.identifier.issn 0962-8452
dc.identifier.uri http://hdl.handle.net/10088/18297
dc.description.abstract Darwin considered the horns of male beetles to be among the most striking examples of sexual selection. As with antlers in deer or elk, beetle horns scale positively with male body size, with the result that large males have disproportionately longer horns than small males. It is generally assumed that such scaling relationships (&#39;static allometries&#39;) are insensitive to short-term changes in the environment, and for this reason they are regularly used as diagnostic attributes of populations or species. Here I report breeding experiments on horned beetles that demonstrate that the scaling relationship between male horn length and body size changes when larval nutrition changes. Males reared on a low-quality diet had longer horn lengths at any given body size than sibling males reared on a high-quality diet. Such &#39;allometry plasticity&#39; may explain seasonal changes observed in this same scaling relationship in a natural population. These experiments demonstrate that scaling relationships of sexually selected traits can respond facultatively to variation in the environment, thereby revealing a new mechanism by which males regulate the production of exaggerated secondary sexual traits. en
dc.relation.ispartof Proceedings of the Royal Society B: Biological Sciences en
dc.title Diet alters male horn allometry in the beetle Onthophagus acuminatus (Coleoptera: Scarabaeidae) en
dc.type Journal Article en
dc.identifier.srbnumber 103007
rft.jtitle Proceedings of the Royal Society B: Biological Sciences
rft.volume 264
rft.issue 1381
rft.spage 567
rft.epage 574
dc.description.SIUnit STRI en
dc.citation.spage 567
dc.citation.epage 574


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