Rodent Societies: An Ecological & Evolutionary Perspective

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E O. Wilson (1975)defines sociality as “the com- bined properties and processes of social existence.” Only a definition this bro ...

ing ground squirrel sociality, in an attempt to: (1) summa- rize the ecological factors underlying the appearance and maintenanc ...

directly with body size, seasonality, or reproductive effort, but was highly correlated with age of first reproduction, such tha ...

species; Blumstein and Armitage 1997b) and between so- cial complexity and ground squirrel life-history tactics, in- cluding: th ...

Armitage (1988) noted that large patches of suitable habitat support yellow-bellied marmot colonies composed of mul- tiple matri ...

Columbian ground squirrels (S. columbianus;King 1989a, 1989b). Similarly, kin-differential behavior and the spatial aggregation ...

primary focus in such social endeavors is amply illustrated by the occurrence of infanticide among close kin in black- tailed pr ...

als may place themselves at greater risk of predation in warning fellow group members of the presence of a pred- ator (Sherman 1 ...

hibernation, delayed dispersal) as attempted by Blumstein and Armitage (1997b, 1998) onto those phylogenies may ultimately provi ...

direct descendents, increasing sociality may involve the re- laxation of restrictions on interactions among group mem- bers, res ...

tive experiments to clarify the role kinship plays in influenc- ing social behavior. We also suggest that insight into the evolu ...

I t is now generally agreedthat sociality, that is, group living, has both costs and benefits. Among the benefits are increased ...

(Armitage and Downhower 1974; Armitage 1991). How- ever, some males achieve polygymy by expanding their home ranges to include t ...

ality in this genus evolve, and (2) why are there diverse so- cial systems? The attempt to answer these questions re- quires und ...

productions, and M. baibacina, M. caligata, M. camtschat- ica, M. caudata, M. menzbieri,andM. vancouverensisoften skip 2 or more ...

that, coupled with a metabolic rate lower than that predicted from body mass (metabolism equations and a tis- sue growth effici ...

mates are more closely related than a random sample of the population. Burrow-mates in M. olympuson average are related by 0.41 ...

Benefits of Group Living Delayed dispersal in marmots with a family social structure is associated with increased survivorship. ...

nates, and infants were present (Arnold 1990b). Interest- ingly, less-related subordinates lost less mass when hiber- nating in ...