Kin in space: social viscosity in a spatially and genetically substructured network

Wolf JBW, Trillmich F (2008)
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 275(1647): 2063-2069.

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Abstract
Population substructuring is a fundamental aspect of animal societies. A growing number of theoretical studies recognize that who-meets-whom is not random, but rather determined by spatial relationships or illustrated by social networks. Structural properties of large highly dynamic social systems are notoriously difficult to unravel. Network approaches provide powerful ways to analyse the intricate relationships between social behaviour, dispersal strategies and genetic structure. Applying network analytical tools to a colony of the highly gregarious Galapagos sea lion (Zalophus wollebaeki), we find several genetic clusters that correspond to spatially determined 'network communities'. Overall relatedness was low, and genetic structure in the network can be interpreted as an emergent property of philopatry and seems not to be primarily driven by targeted interactions among highly related individuals in family groups. Nevertheless, social relationships between directly adjacent individuals in the network were stronger among genetically more similar individuals. Taken together, these results suggest that even small differences in the degree of relatedness can influence behavioural decisions. This raises the fascinating prospect that kin selection may also apply to low levels of relatedness within densely packed animal groups where less obvious co-operative interactions such as increased tolerance and stress reduction are important.
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Wolf JBW, Trillmich F. Kin in space: social viscosity in a spatially and genetically substructured network. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES. 2008;275(1647):2063-2069.
Wolf, J. B. W., & Trillmich, F. (2008). Kin in space: social viscosity in a spatially and genetically substructured network. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 275(1647), 2063-2069.
Wolf, J. B. W., and Trillmich, F. (2008). Kin in space: social viscosity in a spatially and genetically substructured network. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 275, 2063-2069.
Wolf, J.B.W., & Trillmich, F., 2008. Kin in space: social viscosity in a spatially and genetically substructured network. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, 275(1647), p 2063-2069.
J.B.W. Wolf and F. Trillmich, “Kin in space: social viscosity in a spatially and genetically substructured network”, PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES, vol. 275, 2008, pp. 2063-2069.
Wolf, J.B.W., Trillmich, F.: Kin in space: social viscosity in a spatially and genetically substructured network. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES. 275, 2063-2069 (2008).
Wolf, Jochen B. W., and Trillmich, Fritz. “Kin in space: social viscosity in a spatially and genetically substructured network”. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 275.1647 (2008): 2063-2069.
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Strength of social tie predicts cooperative investment in a human social network.
Harrison F, Sciberras J, James R., PLoS ONE 6(3), 2011
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Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galapagos sea lion populations.
Wolf JB, Harrod C, Brunner S, Salazar S, Trillmich F, Tautz D., BMC Evol. Biol. 8(), 2008
PMID: 18485220

53 References

Data provided by Europe PubMed Central.

Social structure in a colonial mammal: unravelling hidden structural layers and their foundations by network analysis
Wolf J.B.W, Mawdsley D, Trillmich F, James R., 2007
Galápagos and Californian sea lions are separate species: genetic analysis of the genus and its implications for conservation management
Wolf J.B.W, Tautz D, Trillmich F., 2007
Tracing early stages of species differentiation: ecological, morphological and genetic divergence of Galapagos sea lion populations.
Wolf JB, Harrod C, Brunner S, Salazar S, Trillmich F, Tautz D., BMC Evol. Biol. 8(), 2008
PMID: 18485220

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