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Genetic structure of lions ( Panthera leo L.) in the Selous Game Reserve: implications for the evolution of sociality

2002; Oxford University Press; Volume: 15; Issue: 6 Linguagem: Inglês

10.1046/j.1420-9101.2002.00473.x

1420-9101

Göran Spong, John Stone, Scott Creel, Mats Björklund,

Genetic and phenotypic traits in livestock

Abstract We use 14 microsatellites to examine the genetic structure of a lion (Panthera leo L.) population in southern Tanzania. Heterozygosity levels were high (0.75 ± 0.08). Relatedness estimates showed that prides often had close relatives in neighbouring prides, whereas few relatives were found in prides not sharing a border. The drop-off in relatedness with distance was highly significant. Female pridemates exhibited a higher mean relatedness (0.26 ± 0.07) to one another than did pride males (0.11 ± 0.07). Mean relatedness among females was significantly higher in small prides than in large ones. Prides exhibited significant inbreeding avoidance (FIL: −0.11). Mating did not detectably differ from random across prides (FIT: −0.02 ns). In addition to being recognizable behavioural and demographic units, prides were statistically distinct genetic units (FLT: 0.07). Some neighbouring prides grouped together both geographically and genetically, forming ‘superprides’ in the population (FZT = 0.05). Thus, although individual prides were genetically distinct, there was an important genetic structure above the level of social groups.