ArticleEcology and evolution2026
Male-Biased Dispersal Leads to Expansion After Decline: The Hokkaido Brown Bear (
Article in Ecology and evolution, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sex-biased dispersal potentially underpins the genetic structural mismatch in genetic structure between differently inherited genetic loci, but accurately evaluating the effect of sex-biased dispersal is challenging due to other sex-biased traits and limitations in usable data. Brown bears exhibit extreme male-biased dispersal, with significant genetic differences between maternally and paternally inherited loci. This study aims to investigate how the characteristic genetic structure in Hokkaido, Japan has been shaped and to evaluate the influence of male-biased dispersal and environmental barriers on this process. We conducted a reduced-representation genome sequencing, ddRAD-seq, and combined it with mitochondrial DNA and Y chromosomal haplotype data. Genetic differences between the southern subpopulations and the other subpopulations were observed, which may reflect restricted gene flow, particularly among female bears, as a consequence of lowland barriers. The ratio of genetic differentiation between the X-chromosome and autosomes suggests a significant effect of male-biased dispersal within the Hokkaido population, with slight variation in this effect among subpopulations. Species distribution modeling estimated that suitable habitat decreased during the Last Glacial Period, and demographic simulation inferred a historical population decline during this period, followed by population expansion. These results suggest that the Hokkaido population had contracted and isolated in spite of the appearance of the land bridge and has expanded after that while being limited by the lowlands. Male-biased dispersal likely contributed to population recolonization after significant population decline and habitat reduction due to climate changes.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.