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Striped mice -- the neighbors from hell

Date:
June 23, 2010
Source:
BioMed Central
Summary:
Fighting, paternity tests and infidelity. No, not a daytime talk show, but the results of new research examining why the fur will fly if a four-striped grass mouse (Rhabdomys pumilio) wanders into his neighbor's territory. Researchers investigated aggression in the mammalian species, finding that breeding males are much more concerned with repelling their neighbors than with defending their partners from complete strangers.

Rhabdomys pumilio (striped mouse).
Credit: Courtesy of Wikimedia Commons

Fighting, paternity tests and infidelity. No, not a daytime talk show, but the results of new research examining why the fur will fly if a four-striped grass mouse (Rhabdomys pumilio) wanders into his neighbour's territory.

Researchers writing in BioMed Central's open access journal Frontiers in Zoology investigated aggression in the mammalian species, finding that breeding males are much more concerned with repelling their neighbours than with defending their partners from complete strangers.

Carsten Schradin from the University of Zurich, Switzerland, worked with a team of researchers to stage encounters between wild mice in a specially created 'neutral' arena. He said, "We found that breeding males tested during the breeding season showed significantly more aggression towards their neighbours than towards strange breeding males not neighbouring them. Breeding males were significantly more aggressive than non-breeders."

This 'Nasty Neighbour' phenomenon has been seen in other animals and contrasts with the 'Dear Enemy' behavior in which the breeding male will preferably attack strangers. Both are ways of limiting the cost of territorial behavior. In this field study, the researchers were able to test the paternity of offspring conceived during the study period and found that neighbouring males were more likely than the wandering strangers to sire pups with another mouse's 'harem'.

According to Schradin, this may explain the animal's preference for neighbourly aggression, "We've found that the neighbours of breeding males pose a recognisable threat to the breeding male's confidence of paternity, and suggest that this explains the occurrence of the nasty neighbour phenomenon in striped mice."


Story Source:

The above story is based on materials provided by BioMed Central. Note: Materials may be edited for content and length.


Journal Reference:

  1. Carsten Schradin, Carola Schneider and Anna K Lindholm. The nasty neighbour in the striped mouse (Rhabdomys pumilio) steals paternity and elicits aggression. Frontiers in Zoology, 2010; (in press) [link]

Cite This Page:

BioMed Central. "Striped mice -- the neighbors from hell." ScienceDaily. ScienceDaily, 23 June 2010. <www.sciencedaily.com/releases/2010/06/100622191928.htm>.
BioMed Central. (2010, June 23). Striped mice -- the neighbors from hell. ScienceDaily. Retrieved August 22, 2014 from www.sciencedaily.com/releases/2010/06/100622191928.htm
BioMed Central. "Striped mice -- the neighbors from hell." ScienceDaily. www.sciencedaily.com/releases/2010/06/100622191928.htm (accessed August 22, 2014).

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