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Katriina Tiira Anssi Laurila Katja Enberg Jorma Piironen Sami Aikio Esa Ranta Craig R. R. Primmer 《Behavioral ecology and sociobiology》2006,59(5):657-665
A key question of evolutionary importance is what factors influence who becomes dominant. Individual genetic variation has been found to be associated with several fitness traits, including behaviour. Could it also be a factor influencing social dominance? We investigated the association between social status and the amount of intra-individual genetic variation in juvenile brown trout (Salmo trutta). Genetic variation was estimated using 12 microsatellite loci. Dominant individuals had higher mean heterozygosity than subordinates in populations with the longest hatchery background. Heterozygosity–heterozygosity correlations did not find any evidence of inbreeding; however, single-locus analysis revealed four loci that each individually differed significantly between dominant and subordinate fish, thus giving more support to local than general effect as the mechanism behind the observed association between genetic diversity and a fitness-associated trait. We did not find any significant relation between mean d 2 and social status, or internal relatedness and social status. Our results suggest that individual genetic variation can influence dominance relations, but manifestation of this phenomenon may depend on the genetic background of the population. 相似文献
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A test of male mating and hunting success in the kestrel: the advantages of smallness? 总被引:2,自引:0,他引:2
H. Hakkarainen E. Huhta Katriina Lahti Päivi Lundvall Tapio Mappes Pasi Tolonen Jürgen Wiehn 《Behavioral ecology and sociobiology》1996,39(6):375-380
We tested female choice for male wing and tarsus length and body mass in the kestrel (Falco tinnunculus), a species in which males average about 10% smaller than females. We also studied how male characters are related to their
hunting success. In the laboratory, females preferred lighter males with shorter tarsi as mates, if the difference in those
characters between competing males was larger than average. Lighter and shorter-winged males seemed to be better hunters than
heavier and longer-winged males. Field observations in a year in which voles were scarce suggested that shorter-winged males
were also better food providers in courtship feeding than longer-winged males,although in good vole years such a relationship
was not found. We argue that females may prefer to pair with smaller males, because they have higher flight performance and
better hunting success than heavier males. By doing so, females may gain direct breeding advantages. We conclude that both
female choosiness and the hunting efficiency of males well contribute to reversed sexual size dimorphism (RSD, females larger
than males) in the kestrel.
Received: 18 July 1995/Accepted after revision: 17 August 1996 相似文献
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