Heritability of male mandible length in the stag beetle Cyclommatus metallifer
Version of Record online: 11 JUN 2012
© 2012 The Entomological Society of Japan
Volume 15, Issue 4, pages 430–433, October 2012
How to Cite
GOTOH, H., FUKAYA, K. and MIURA, T. (2012), Heritability of male mandible length in the stag beetle Cyclommatus metallifer. Entomological Science, 15: 430–433. doi: 10.1111/j.1479-8298.2012.00527.x
- Issue online: 4 OCT 2012
- Version of Record online: 11 JUN 2012
- Received 17 November 2011; accepted 29 March 2012.
- exaggerated morphology;
- static allometry;
- weapon trait
Numerous coleopteran species express male-specific “weapon traits” that often show size variations among males, even within a single population. Many empirical studies have demonstrated that environmental conditions during development affect absolute weapon size. However, relatively few studies in horned beetles support the hypothesis that the relationship between weapon size and body size, also referred to as a “scaling relationship” or “static allometry”, is largely determined by genetic factors. In this study, the heritability of absolute mandible length and static allometry between mandible length and body size were estimated in the stag beetle Cyclommatus metallifer. While no significant heritable variation was observed in absolute mandible length, high heritability (h2 = 0.57 ± 0.25) was detected in the static allometry between mandible length and body size. This is the first report on the genetic effect on male mandible size in Lucanidae, suggesting that absolute mandible size is largely determined by environmental conditions while the static allometry between weapon size and body size is primarily determined by genetic factors.