Limits...
Can persistence hunting signal male quality? A test considering digit ratio in endurance athletes.

Longman D, Wells JC, Stock JT - PLoS ONE (2015)

Bottom Line: Various theories have been posed to explain the fitness payoffs of hunting success among hunter-gatherers. 'Having' theories refer to the acquisition of resources, and include the direct provisioning hypothesis.Digit ratio was significantly and positively correlated with half-marathon time in males (right hand: r = 0.45, p<0.001; left hand: r = 0.42, p<0.001) and females (right hand: r = 0.26, p<0.01; left hand: r = 0.23, p = 0.02).However, further work is required to establish whether and how females respond to this signalling for fitness.

View Article: PubMed Central - PubMed

Affiliation: Department of Archaeology and Anthropology, University of Cambridge, Cambridge, United Kingdom.

ABSTRACT
Various theories have been posed to explain the fitness payoffs of hunting success among hunter-gatherers. 'Having' theories refer to the acquisition of resources, and include the direct provisioning hypothesis. In contrast, 'getting' theories concern the signalling of male resourcefulness and other desirable traits, such as athleticism and intelligence, via hunting prowess. We investigated the association between androgenisation and endurance running ability as a potential signalling mechanism, whereby running prowess, vital for persistence hunting, might be used as a reliable signal of male reproductive fitness by females. Digit ratio (2D:4D) was used as a proxy for prenatal androgenisation in 439 males and 103 females, while a half marathon race (21km), representing a distance/duration comparable with that of persistence hunting, was used to assess running ability. Digit ratio was significantly and positively correlated with half-marathon time in males (right hand: r = 0.45, p<0.001; left hand: r = 0.42, p<0.001) and females (right hand: r = 0.26, p<0.01; left hand: r = 0.23, p = 0.02). Sex-interaction analysis showed that this correlation was significantly stronger in males than females, suggesting that androgenisation may have experienced stronger selective pressure from endurance running in males. As digit ratio has previously been shown to predict reproductive success, our results are consistent with the hypothesis that endurance running ability may signal reproductive potential in males, through its association with prenatal androgen exposure. However, further work is required to establish whether and how females respond to this signalling for fitness.

No MeSH data available.


Related in: MedlinePlus

Scatter plot of male and female right hand 2D:4D ratio versus half marathon performance (s).The steeper male gradient is visible.
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pone.0121560.g001: Scatter plot of male and female right hand 2D:4D ratio versus half marathon performance (s).The steeper male gradient is visible.

Mentions: Among the male subsample there was a significant positive correlation between right and left hand 2D:4D ratio and half-marathon time (right r = 0.45, p < 0.001; left r = 0.42, p < 0.001). When age was controlled for the correlation strengthened (right r = 0.47, p < 0.001; left r = 0.43, p < 0.001). The same was true among the female subsample (right hand r = 0.26, p < 0.01; left hand r = 0.23, p = 0.02), with the correlation strengthening when age was controlled for (right r = 0.29, p < 0.01; left r = 0.26, p < 0.01). These positive correlations can be seen below in Fig. 1. Note the steeper regression line in the male subsample compared to the female subsample.


Can persistence hunting signal male quality? A test considering digit ratio in endurance athletes.

Longman D, Wells JC, Stock JT - PLoS ONE (2015)

Scatter plot of male and female right hand 2D:4D ratio versus half marathon performance (s).The steeper male gradient is visible.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4390232&req=5

pone.0121560.g001: Scatter plot of male and female right hand 2D:4D ratio versus half marathon performance (s).The steeper male gradient is visible.
Mentions: Among the male subsample there was a significant positive correlation between right and left hand 2D:4D ratio and half-marathon time (right r = 0.45, p < 0.001; left r = 0.42, p < 0.001). When age was controlled for the correlation strengthened (right r = 0.47, p < 0.001; left r = 0.43, p < 0.001). The same was true among the female subsample (right hand r = 0.26, p < 0.01; left hand r = 0.23, p = 0.02), with the correlation strengthening when age was controlled for (right r = 0.29, p < 0.01; left r = 0.26, p < 0.01). These positive correlations can be seen below in Fig. 1. Note the steeper regression line in the male subsample compared to the female subsample.

Bottom Line: Various theories have been posed to explain the fitness payoffs of hunting success among hunter-gatherers. 'Having' theories refer to the acquisition of resources, and include the direct provisioning hypothesis.Digit ratio was significantly and positively correlated with half-marathon time in males (right hand: r = 0.45, p<0.001; left hand: r = 0.42, p<0.001) and females (right hand: r = 0.26, p<0.01; left hand: r = 0.23, p = 0.02).However, further work is required to establish whether and how females respond to this signalling for fitness.

View Article: PubMed Central - PubMed

Affiliation: Department of Archaeology and Anthropology, University of Cambridge, Cambridge, United Kingdom.

ABSTRACT
Various theories have been posed to explain the fitness payoffs of hunting success among hunter-gatherers. 'Having' theories refer to the acquisition of resources, and include the direct provisioning hypothesis. In contrast, 'getting' theories concern the signalling of male resourcefulness and other desirable traits, such as athleticism and intelligence, via hunting prowess. We investigated the association between androgenisation and endurance running ability as a potential signalling mechanism, whereby running prowess, vital for persistence hunting, might be used as a reliable signal of male reproductive fitness by females. Digit ratio (2D:4D) was used as a proxy for prenatal androgenisation in 439 males and 103 females, while a half marathon race (21km), representing a distance/duration comparable with that of persistence hunting, was used to assess running ability. Digit ratio was significantly and positively correlated with half-marathon time in males (right hand: r = 0.45, p<0.001; left hand: r = 0.42, p<0.001) and females (right hand: r = 0.26, p<0.01; left hand: r = 0.23, p = 0.02). Sex-interaction analysis showed that this correlation was significantly stronger in males than females, suggesting that androgenisation may have experienced stronger selective pressure from endurance running in males. As digit ratio has previously been shown to predict reproductive success, our results are consistent with the hypothesis that endurance running ability may signal reproductive potential in males, through its association with prenatal androgen exposure. However, further work is required to establish whether and how females respond to this signalling for fitness.

No MeSH data available.


Related in: MedlinePlus