TitleAbstractYear(sorted ascending)
delayed dispersal as a route to breeding: territorial inheritance, safe havens, and ecological constraints.the relative roles of ecological constraints, the benefits of philopatry, and the role of life history continue to be debated in the evolution of natal philopatry and cooperative breeding. we compare three routes to breeding: departing to search for territories as a floater, staying and queuing to inherit the natal territory, or queuing and eventually shifting to a neighboring vacancy. our model assumed a dominance-structured population. it quantifies the benefits of philopatry for varying-rank ...200218707523
isolation and cross-species amplification of microsatellite loci in the siberian jay (perisoreus infaustus). 200212627843
why offspring delay dispersal: experimental evidence for a role of parental tolerance.approximately 3% of all bird species live in families based on a prolonged parent-offspring association. formation of family groups often appears to be associated with various constraints on the possibilities of independent reproduction for the offspring. however, delayed dispersal is not the only alternative for offspring that defer reproduction. to account for the formation of a family group it is also necessary to explain why non-dispersing offspring forego the alternative options to join oth ...200212204132
reduced mortality selects for family cohesion in a social species.delayed dispersal is the key to family formation in most kin-societies. previous explanations for the evolution of families have focused on dispersal constraints. recently, an alternative explanation was proposed, emphasizing the benefits gained through philopatry. empirical data have confirmed that parents provide their philopatric offspring with preferential treatment through enhanced access to food and predator protection. yet it remains unclear to what extent such benefits translate into fit ...200616822747
predation risk induces changes in nest-site selection and clutch size in the siberian theory predicts that an individual should reduce its reproductive efforts by laying a smaller clutch size when high risk of nest predation reduces the value of current reproduction. evidence in favour of this 'nest predation hypothesis', however, is scarce and based largely on correlative analyses. here, we manipulated perceived risk of nest predation in the siberian jay perisoreus infaustus using playback involving a mixture of calls by corvid nest predators in the vicinity of nest ...200616608689
impact of forestry practices on fitness correlates and population productivity in an open-nesting bird the boreal forests of fennoscandia, over 99% of forest area has been altered by forestry practices, which has created forest with age structures and stand characteristics that differ from primary forest stands. although many researchers have investigated how forestry affects species abundance, few have assessed how forestry practices affect fitness correlates of species living in altered habitats, and this has negatively affected management efforts. we experimentally addressed the effect of s ...200717531054
phylogeographic patterns in widespread corvid birds.intraspecific genetic diversity and phylogeography of corvus corone was investigated using the mitochondrial (mt) control region as a molecular marker. a split into two distinct mt lineages was observed. one represents individuals from a wide geographic range spanning from england to the russian far east (kamchatka), while the other one was found in the primorye and khabarovsk regions (southern parts of russian far east) as well as japan. for comparison, we investigated several widespread palear ...200717920300
seventy new microsatellites for the pied flycatcher, ficedula hypoleuca and amplification in other passerine birds.the pied flycatcher (ficedula hypoleuca) is a small migratory passerine bird commonly distributed across europe which has been the focus of considerable ecological and evolutionary research. here, we present details of 70 microsatellite markers for the species adding to the six which are currently available. sixty-six markers were also polymorphic in the closely related collared flycatcher (ficedula albicollis), while 54 were polymorphic in another related passerine, the bluethroat (luscinia sve ...200821585917
isolation and characterization of 100 polymorphic microsatellite loci for the siberian jay (perisoreus infaustus).we describe primers and polymerase chain reaction conditions to amplify 100 microsatellite loci from the siberian jay (perisoreus infaustus). the primers were tested on two geographically separated finnish populations. the developed primer pairs yielded an average of 4.72 alleles per locus (range one to 17) and an average observed heterozygosity of 0.55 (range 0.04 to 1).200821586079
a bayesian framework for comparative quantitative genetics.bayesian approaches have been extensively used in animal breeding sciences, but similar approaches in the context of evolutionary quantitative genetics have been rare. we compared the performance of bayesian and frequentist approaches in estimation of quantitative genetic parameters (viz. matrices of additive and dominance variances) in datasets typical of evolutionary studies and traits differing in their genetic architecture. our results illustrate that it is difficult to disentangle the relat ...200818211881
referential calls signal predator behavior in a group-living bird species.predation is a powerful agent of natural selection, driving the evolution of antipredator calls [1]. these calls have been shown to communicate predator category [2-4] and/or predator distance to conspecifics [5-7]. however, the risk posed by predators depends also on predator behavior [8], and the ability of prey to communicate predator behavior to conspecifics would be a selective advantage reducing their predation risk. i tested this idea in siberian jays (perisoreus infaustus), a group-livin ...200818177716
mobbing calls signal predator category in a kin group-living bird species.many prey species gather together to approach and harass their predators despite the associated risks. while mobbing, prey usually utter calls and previous experiments have demonstrated that mobbing calls can convey information about risk to conspecifics. however, the risk posed by predators also differs between predator categories. the ability to communicate predator category would be adaptive because it would allow other mobbers to adjust their risk taking. i tested this idea in siberian jays ...200919474047
a first-generation microsatellite-based genetic linkage map of the siberian jay (perisoreus infaustus): insights into avian genome evolution.genomic resources for the majority of free-living vertebrates of ecological and evolutionary importance are scarce. therefore, linkage maps with high-density genome coverage are needed for progress in genomics of wild species. the siberian jay (perisoreus infaustus; corvidae) is a passerine bird which has been subject to lots of research in the areas of ecology and evolutionary biology. knowledge of its genome structure and organization is required to advance our understanding of the genetic bas ...200919121221
habitat-specific demography and source-sink dynamics in a population of siberian jays.1. there are a number of models describing population structure, many of which have the capacity to incorporate spatial habitat effects. one such model is the source-sink model, that describes a system where some habitats have a natality that is higher than mortality (source) and others have a mortality that exceeds natality (sink). a source can be maintained in the absence of migration, whereas a sink will go extinct. 2. however, the interaction between population dynamics and habitat quality i ...201019840174
avian z-specific microsatellites map to pseudoautosomal or autosomal chromosomes in the siberian jay (perisoreus infaustus): insights into avian genome evolution from cross-species amplification tests. 201020861574
genetic evidence for male-biased dispersal in the siberian jay (perisoreus infaustus) based on autosomal and z-chromosomal in natal dispersal patterns can have important genetic and evolutionary consequences; however, reliable information about sex-biased dispersal can be difficult to obtain with observational methods. we analysed the sex-specific patterns of genetic differentiation among three siberian jay (perisoreus infaustus) populations, using 11 autosomal and six z-chromosomal microsatellite markers. irrespective of marker-type and indices used (viz. f(st), average pairwise relatedness and effective n ...201020977509
high fidelity--no evidence for extra-pair paternity in siberian jays (perisoreus infaustus).extra-pair paternity (epp) in birds is related to a number of ecological and social factors. for example, it has been found to be positively related with breeding density, negatively with the amount of paternal care and especially high rates have been observed in group-living species. siberian jays (perisoreous infaustus) breed at low densities and have extended parental care, which leads to the expectation of low rates of epp. on the other hand, siberian jays live in groups which can include al ...201020711255
sex-specific population structure, natural selection, and linkage disequilibrium in a wild bird population as revealed by genome-wide microsatellite analyses.sexual dimorphism in ecologically important traits is widespread, yet the differences in the genomic architecture between the two sexes are largely unexplored. we employed a genome-wide multilocus approach to examine the sexual differences in population subdivision, natural selection and linkage disequilibrium (ld) in a wild siberian jay (perisoreus infaustus) population, using genotypes at a total of 107 autosomal and z-chromosomal microsatellites.201020211004
genetic and environmental effects on a condition-dependent trait: feather growth in siberian jays.condition, defined as the amount of 'internal resources' an individual can freely allocate, is often assumed to be environmentally determined and to reflect an individual's health and nutritional status. however, an additive genetic component of condition is possible if it 'captures' the genetic variance of many underlying traits as many fitness-related traits appear to do. yet, the heritability of condition can be low if selection has eroded much of its additive genetic variance, or if the envi ...201020210831
extensive linkage disequilibrium in a wild bird population.knowledge about the extent and patterns of linkage disequilibrium (ld) can provide important insights into demographic processes and strategies to identify the genetic basis of complex phenotypes in wild populations. however, data on the extent and patterns of ld from non-model vertebrate species from the wild are still scarce. we conducted so far the most extensive and detailed examination of ld in a pedigreed wild bird population using genotypes from 97 autosomal and 6 gonosomal microsatellite ...201019888292
population differences in levels of linkage disequilibrium in the wild.information about the levels of linkage disequilibrium (ld) in wild animal populations is still limited, and this is true particularly with respect to possible interpopulation variation in the levels of ld. we compared the levels and extent of ld at the genome-wide scale in three siberian jay (perisoreus infaustus) populations, two of which (kuusamo and ylläs) represented outbred populations within the main distribution area of the species, whereas the third (suupohja) was a semi-isolated, parti ...201121672068
causes of ring-related leg injuries in birds - evidence and recommendations from four field of the main techniques for recognizing individuals in avian field research is marking birds with plastic and metal leg rings. however, in some species individuals may react negatively to rings, causing leg injuries and, in extreme cases, the loss of a foot or limb. here, we report problems that arise from ringing and illustrate solutions based on field data from brown thornbills (acanthiza pusilla) (2 populations), siberian jays (perisoreus infaustus) and purple-crowned fairy-wrens (malurus ...201223300574
do warning calls boost survival of signal recipients? evidence from a field experiment in a group-living bird species.warning calls are a widespread anti-predator adaptation, which can signal unprofitability to predators or alert other potential targets of the predator. although it is tacitly assumed that the recipients of warning calls experience a reduction in predation risk, this crucial assumption remains untested. here i tested this hypothesis with a field experiment in the group-living siberian jay, perisoreus infaustus. i exposed male or female breeding adults that were foraging together with a non-breed ...201323941356
disentangling plastic and genetic changes in body mass of siberian jays.spatial and temporal phenotypic differentiation in mean body size is of commonplace occurrence, but the underlying causes remain often unclear: both genetic differentiation in response to selection (or drift) and environmentally induced plasticity can create similar phenotypic patterns. studying changes in body mass in siberian jays (perisoreus infaustus) over three decades, we discovered that mean body mass declined drastically (ca. 10%) over the first two decades, but increased markedly therea ...201424930732
fine-scale kin recognition in the absence of social familiarity in the siberian jay, a monogamous bird species.kin recognition is a critical element to kin cooperation, and in vertebrates, it is primarily based on associative learning. recognition of socially unfamiliar kin occurs rarely, and it is reported only in vertebrate species where promiscuity prevents recognition of first-order relatives. however, it is unknown whether the recognition of socially unfamiliar kin can evolve in monogamous species. here, we investigate whether genetic relatedness modulates aggression among group members in siberian ...201526460512
[peculiarities of the contour feather microstructure in the corvidae family].the results of comparative electron microscope study of the fine structure of the definitive contour feathers often crows species (perisoreus infaustus, garrulus glandarius, cyanopica cyanus, pica pica, podoceus panderi, nucifraga caryocatactes, corvus monedula, c. frugilegus, c. cornix, c. corax) are presented. the results of the research allowed us to conclude that crows, along with the traditional elements of feather architectonics, have a number of species-specific microstructure characteris ...201621870493
naive juveniles are more likely to become breeders after witnessing predator mobbing.responding appropriately during the first predatory attack in life is often critical for survival. in many social species, naive juveniles acquire this skill from conspecifics, but its fitness consequences remain virtually unknown. here we experimentally demonstrate how naive juvenile siberian jays (perisoreus infaustus) derive a long-term fitness benefit from witnessing knowledgeable adults mobbing their principal predator, the goshawk (accipiter gentilis). siberian jays live in family groups o ...201728035889
reproductive trade-offs in a long-lived bird species: condition-dependent reproductive allocation maintains female survival and offspring history theory is an essential framework to understand the evolution of reproductive allocation. it predicts that individuals of long-lived species favour their own survival over current reproduction, leading individuals to refrain from reproducing under harsh conditions. here we test this prediction in a long-lived bird species, the siberian jay perisoreus infaustus. long-term data revealed that females rarely refrain from breeding, but lay smaller clutches in unfavourable years. neither o ...201728135017
the interacting effects of forestry and climate change on the demography of a group-living bird population.anthropogenic degradation of natural habitats is a global driver of wildlife population declines. local population responses to such environmental perturbations are generally well understood, but in socially structured populations, interactions between environmental and social factors may influence population responses. thus, understanding how habitat degradation affects the dynamics of these populations requires simultaneous consideration of social and environmental mechanisms underlying demogr ...201829492692
remotely sensed forest understory density and nest predator occurrence interact to predict suitable breeding habitat and the occurrence of a resident boreal bird species.habitat suitability models (hsm) based on remotely sensed data are useful tools in conservation work. however, they typically use species occurrence data rather than robust demographic variables, and their predictive power is rarely evaluated. these shortcomings can result in misleading guidance for conservation. here, we develop and evaluate a hsm based on correlates of long-term breeding success of an open nest building boreal forest bird, the siberian jay. in our study site in northern sweden ...202032128152
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