Superoxide dismutase deficiency impairs olfactory sexual signalling and alters bioenergetic function in mice

Superoxide dismutase deficiency impairs olfactory sexual signalling and alters bioenergetic function in mice. (2014).  Michael Garratt, Nicolas Pichaud, Elias N. Glaros, Anthony John Kee, and Robert C. Brooks. Proceedings of the National Academy of Sciences USA. doi: 10.1073/pnas.132228211

 

Exposure to a novel male during late pregnancy influences subsequent growth of offspring during lactation.

T. Gale, A. B. Gibson, R. C. Brooks, M. Garratt
Journal of Evolutionary Biology. DOI: 10.1111/jeb.12192
Abstract
In mammals, allocation to reproduction can either be primed or suppressed in relation to cues from other individuals. Some conspecifics (e.g. potential mates) may enhance an individual’s ability to reproduce but others may have a detrimental effect on reproductive success. One widely studied response to conspecific cues, the ‘Bruce effect’, occurs when pregnant females abort their pregnancies after exposure to a novel male. It has been suggested that this response has evolved as a counter-tactic to the threat of infanticide posed by novel males. In some species, like mice, pregnancy termination will only occur if females are exposed to the unfamiliar male during a brief critical period early in pregnancy, which is surprising considering that an unfamiliar male threatens infanticide whenever present, and in particular near to birth. We demonstrate that female mice experiencing novel males during late pregnancy also alter their investment in progeny, but in a more subtle manner than previously observed. Females exposed to an unfamiliar male during late pregnancy give birth to offspring of a comparable weight to those produced by females exposed to the paternal male, but these offspring grow more slowly over lactation. As a consequence, offspring from these females weigh less at weaning. Modification of their growth trajectory, however, allows these offspring to catch up to normal weights by adulthood. Thus, cues of unfamiliar males, and possibly their associated threat of infanticide, can produce more wide-ranging effects on maternal investment than previously recognized.

National income inequality predicts women’s preferences for masculinized faces better than health does.

BROOKS, R., SCOTT, I.M., MAKLAKOV, A.A., KASUMOVIC, M.M., CLARK, A.P., PENTON-VOAK, I.S. National income inequality predicts women’s preferences for masculinized faces better than health does (Comment on paper by de Bruine et al). Proceedings of the Royal Society of London B.

See also: Blog Post | Article in The Economist

The price of protein: combining evolutionary and economic analysis to understand excessive energy consumption.

BROOKS, RC; SIMPSON, SJ; RAUBENHEIMER, D. 2010. The price of protein: combining evolutionary and economic analysis to understand excessive energy consumption.  Obesity Reviews 11: 887-894.

The Effects of Familiarity and Group Size On Mating Preferences in The Guppy, Poecilia reticulata.

MARIETTE, MM; ZAJITSCHEK, SRK; GARCIA, CM; et al. The Effects of Familiarity and Group Size On Mating Preferences in the Guppy, Poecilia reticulata. Journal of Evolutionary Biology Volume: 23 Issue: 8 Pages: 1772-1782 Published: Aug 2010