Kin selection in Columbian ground squirrels (
 Urocitellus columbianus
 ): littermate kin provide individual fitness benefits

Viblanc, Vincent A.; Arnaud, Coline M.; Dobson, F. Stephen; Murie, Jan O.

doi:10.1098/rspb.2009.1960

Cited by 42 publications

(92 citation statements)

References 47 publications

(61 reference statements)

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“…2004). We chose the latter to make adjustments for changes in population size (after Viblanc et al. 2010).…”

Section: Methodsmentioning

confidence: 99%

“…We recently took an alternative approach of testing for fitness differences among individuals that did and did not share time and space with close kin (Viblanc et al. 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Our study (Viblanc et al. 2010) used matrix models to estimate the individual fitness (after McGraw & Caswell 1996; Oli & Armitage 2008; but see Brommer et al.…”

Section: Introductionmentioning

confidence: 99%

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Kin selection in Columbian ground squirrels: direct and indirect fitness benefits

et al. 2011

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Empirical and theoretical studies have supported kin selection by demonstrating nepotism or modelling its conditions and consequences. As an alternative, we previously found that female Columbian ground squirrels had greater direct fitness when more close kin were present. Extending those results, we used population matrix methods to calculate minimum estimates of individual fitness, estimated direct and indirect components of fitness, estimated inclusive fitness by adding the direct fitness (stripped of estimated influences of the social environment) and indirect fitness components together, and finally looked for inclusive fitness benefits of associations with close kin who seem to be 'genial neighbours'. We examined the estimated fitness of a sample of 35 females for which complete lifetimes were known for themselves, their mothers and their littermate sisters. Six of these females had no cosurviving adult close kin, and their direct fitness was significantly lower than 29 females with such kin (λ = 0.66 vs. λ = 1.23). The net fitness benefit of the presence of close kin was thus 0.57. The estimated indirect component of fitness through benefits to the direct fitness of close kin was 0.43. Thus, estimated inclusive fitness for females with cosurviving close kin (λ = 1.09) was significantly greater than that for females without surviving close kin (viz., λ = 0.66). The presence of closely related and philopatric female kin appeared to result in considerable fitness benefits for female ground squirrels, perhaps through the behavioural mechanisms of lowered aggression and other forms of behavioural cooperation.

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“…2004). We chose the latter to make adjustments for changes in population size (after Viblanc et al. 2010).…”

Section: Methodsmentioning

confidence: 99%

“…We recently took an alternative approach of testing for fitness differences among individuals that did and did not share time and space with close kin (Viblanc et al. 2010).…”

Section: Introductionmentioning

confidence: 99%

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Kin selection in Columbian ground squirrels: direct and indirect fitness benefits

et al. 2011

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“…This study shows that L. caissara show delayed dispersal related to the species' cooperative breeding system and low population density, which hinders the formation of new breeding pairs. The spatial association of close kin is the basis for cooperation and the evolution of the social behaviour [Dobson et al, 1998;Goldizen, 2003;Hatchwell, 2009;Viblanc et al, 2010;Dobson et al, 2012] characteristic of the lion tamarins and all of the callitrichids studied to date [Rylands, 1996]. The turning point determining philopatry or emigration in L. caissara may be group stability and changes in breeding positions associated with kin competition that motivate dispersal.…”

Section: Discussionmentioning

confidence: 99%

Dispersal, Group Formation and Kinship in the Black-Faced Lion Tamarin (Leontopithecus caissara)

Nascimento¹,

Nali²,

Fonseca³

2014

Folia Primatol

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We report on (i) new group formation, (ii) sex differences in dispersal and (iii) dispersal distance over 6 years for 3 social groups of the black-faced lion tamarin (Leontopithecus caissara) in the vicinity of Ariri, São Paulo state, Brazil. The groups were: Bina (monitored for 74 months), BM5 (52 months) and Teca (13 months). Each group was censused once a week and monitored for 3 days each month. Mating opportunities were found to be the incentive for young adult black-faced lion tamarins to either disperse or remain in their kin group. Young adults show delayed dispersal that is related to the cooperative breeding system characteristic of the Callitrichidae and to a low population density which hinders the formation of new breeding pairs. Our findings suggest that in L. caissara (i) both sexes disperse, (ii) successful immigration is related to breeding opportunities in an existing group, (iii) female immigration motivates male emigration and the formation of new groups, and (iv) emigrants tend to form new groups close to their natal groups. These patterns of dispersal and formation of new groups are efficient because the species has been able to avoid loss of genetic diversity despite their small population size.

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“…We calculated individual fitness as the dominant eigenvalue using the ''popbio'' package in R (Stubben and Milligan 2007). We did not adjust for changes in population size (e.g., Viblanc et al 2010, Dobson et al 2012, because brown bears have a slow life history with low birth rates and natural mortality of adults (Schwartz et al 2003, Bischof et al 2009). Brown bear populations are thus expected to be stable from year to year and to not show the substantial population fluctuations often observed in small mammals and some ungulates (e.g., Coulson et al 2001, Hoffmann et al 2003.…”

Section: Discussionmentioning

confidence: 99%

Determinants of lifetime reproduction in female brown bears: early body mass, longevity, and hunting regulations

Zedrosser

Pelletier

Bischof

et al. 2013

Ecology

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Abstract. In iteroparous mammals, conditions experienced early in life may have longlasting effects on lifetime reproductive success. Human-induced mortality is also an important demographic factor in many populations of large mammals and may influence lifetime reproductive success. Here, we explore the effects of early development, population density, and human hunting on survival and lifetime reproductive success in brown bear (Ursus arctos) females, using a 25-year database of individually marked bears in two populations in Sweden. Survival of yearlings to 2 years was not affected by population density or body mass. Yearlings that remained with their mother had higher survival than independent yearlings, partly because regulations prohibit the harvest of bears in family groups. Although mass as a yearling did not affect juvenile survival, it was positively associated with measures of lifetime reproductive success and individual fitness. The majority of adult female brown bear mortality (72%) in our study was due to human causes, mainly hunting, and many females were killed before they reproduced. Therefore, factors allowing females to survive several hunting seasons had a strong positive effect on lifetime reproductive success. We suggest that, in many hunted populations of large mammals, sport harvest is an important influence on both population dynamics and life histories.

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Kin selection in Columbian ground squirrels ( Urocitellus columbianus ): littermate kin provide individual fitness benefits

Cited by 42 publications

References 47 publications

Kin selection in Columbian ground squirrels: direct and indirect fitness benefits

Kin selection in Columbian ground squirrels: direct and indirect fitness benefits

Dispersal, Group Formation and Kinship in the Black-Faced Lion Tamarin <b><i>(Leontopithecus caissara)</i></b>

Determinants of lifetime reproduction in female brown bears: early body mass, longevity, and hunting regulations

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