Han et al 2010 BMC Evolutionary Biology

Size-assortative mating and sexual size dimorphism are predictable from simple mechanics of mate-grasping behavior

A major challenge in evolutionary biology is to understand the typically complex interactions between diverse counter-balancing factors of Darwinian selection for size-assortative mating and sexual size dimorphism. It appears that rarely a simple mechanism could provide a major explanation of these phenomena. Mechanics of behaviors can predict animal morphology, such like adaptations to locomotion in animals from various of taxa, but its potential to predict size-assortative mating and its evolutionary consequences has been less explored. Mate-grasping by males, using specialized adaptive morphologies of their forelegs, midlegs or even antennae wrapped around female body at specific locations, is a general mating strategy of many animals, but the contribution of the mechanics of this wide-spread behavior to the evolution of mating behavior and sexual size dimorphism has been largely ignored.
  Here, we explore the consequences of a simple, and previously ignored, fact that in a grasping posture the position of the male's grasping appendages relative to the female's body is often a function of body size difference between the sexes. Using an approach taken from robot mechanics we model coercive grasping of females by water strider Gerris gracilicornis males during mating initiation struggles. We determine that the male optimal size (relative to the female size), which gives the males the highest grasping force, properly predicts the experimentally measured highest mating success. Through field sampling and simulation modeling of a natural population we determine that the simple mechanical model, which ignores most of the other hypothetical counter-balancing selection pressures on body size, is sufficient to account for size-assortative mating pattern as well as species-specific sexual dimorphism in body size of G. gracilicornis.
  The results indicate how a simple and previously overlooked physical mechanism common in many taxa is sufficient to account for, or importantly contribute to, size-assortative mating and its consequences for the evolution of sexual size dimorphism.


Han CS, Jablonski PG, Kim B & Park FC. 2010. Size-assortative mating and sexual size dimorphism are predictable from simple kinematics of mate-grasping behavior. BMC Evolutionary Biology 10:359.



by Chang | 2010/11/20 21:37 | PUBLICATIONS | 트랙백(1) | 덧글(4)

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제목 : natural garcinia cambogia

Commented by here at 2014/03/18 12:11
전 제 사촌이 웹 사이트를 제안했다. 이 게시물이 다른 아무도 내 문제에 대한 이러한 http://seobacklinkservice.org/ 세부를 알고 그에 의해 작성되어 있는지 모르겠습니다. 당신은 정말 놀라워요! 감사합니다!
Commented by show to si at 2014/06/21 10:46
나는 예쁜이 사이트를 발견 할 기쁘게 생각하고 있습니다. 이 특히 훌륭한 읽기 위해 시간 내 주셔서 감사합니다! 확실히 진짜의 모든 비트를 좋아하고 또한 귀하의 http://pencilsketches.org/ 웹 사이트에 새로운 물건을 볼 표시된 도서를 갖추고 있습니다.
Commented by at 2014/10/15 09:16
여러분으로 입력에 대한 감사의
Commented by 西門 at 2014/12/19 16:25
이 포럼은 정말 좋은 정보입니다!

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