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42 results for “Philopatry”
Data from: Two decades of genetic profiling yields first evidence of natal philopatry and long-term fidelity to parturition sites in sharks
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Data from: Natal foraging philopatry in eastern Pacific hawksbill turtles
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Data from: Beyond dispersal versus philopatry? Alternative behavioural tactics of juvenile roe deer in a heterogeneous landscape
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Data from: Natal and breeding philopatry of female Steller sea lions in southeastern Alaska
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Data for: From rivers to ocean basins: The role of ocean barriers and philopatry in the genetic structuring of a cosmopolitan coastal predator
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Data from: Strong maternal fidelity and natal philopatry shape genetic structure in North Pacfic humpback whales
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Data from: Genetic structure at three spatial scales is consistent with limited philopatry in Ricord’s Rock Iguanas (Cyclura ricordii)
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Data from: Sex-specific estimates of dispersal show female philopatry and male dispersal in a promiscuous amphibian, the alpine salamander (Salamandra atra)
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Data from: Growth affects dispersal success in social mole-rats, but not the duration of philopatry
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Data from: Dispersal, philopatry and population genetic structure of the mainland dibbler, Parantechinus apicalis
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Data from: Fine-scale spatiotemporal patterns of genetic variation reflect budding dispersal coupled with strong natal philopatry in a cooperatively breeding mammal
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Data from: Local population collapse of Ross's and lesser snow geese driven by failing recruitment and diminished philopatry
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Data from: Implications of fidelity and philopatry for the population structure of female black-tailed deer
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Data from: Spatial genetic structure in American black bears (Ursus americanus): female philopatry is variable and related to population history
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VCF from: Genetic evidence of female philopatry in a socially polyandrous shorebird
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Microsatellite genotypes and extraction plate positions from publication: Genetic structure across urban and agricultural landscapes reveals evidence of resource specialization and philopatry in the Eastern carpenter bee, Xylocopa virginica L.
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Data from: Direct genetic evidence for reproductive philopatry and associated fine-scale migrations in female blacktip reef sharks (Carcharhinus melanopterus) in French Polynesia.
Conservation of top predators has been emphasised as essential in an ecosystem due to their role in trophic chain regulation. Optimization of conservation strategies for these endangered marine top predators requires direct estimates of breeding patterns and connectivity, which are essential to understand their population dynamics. While there have been some attempts to investigate breeding patterns of reef sharks from litter reconstruction using molecular analyses, direct fine-scale migrations of female sharks for parturition as well as connectivity at a medium scale, such as between islands, remain mostly unknown. We used microsatellite DNA markers and a likelihood-based parentage analysis to determine breeding patterns of female blacktip reef sharks in Moorea (Society Islands, French Polynesia). Such an approach demonstrates that while most females gave birth at their home island, some migrated to specific nursery areas outside their home range, sometimes going to another island (up to 50 km across deep ocean). Analysis also revealed that females migrated to the same nursery on every birthing event. Many offspring showed a high level of inbreeding indicating an overall reduced population size, restricted movements and dispersal, or specific mating behaviour. Females represent the vectors that transport the genes at nursery grounds, and their fidelity should thus define reproductive units. As females seem to be philopatric, males could be the ones dispersing genes between metapopulations. These results highlight the need for conservation of coastal zones where female reef sharks seems to exhibit philopatry during the breeding season.
Data from: Individual dispersal decisions in a cooperative breeder: ecological constraints, the benefits of philopatry, and the social queue for dominance
1. Delayed dispersal is a key step in the evolution of familial animal societies and cooperative breeding. However, no consensus has been reached on the ecological and social circumstances driving delayed dispersal. 2. Here we test predictions from the ecological constraints and benefits of philopatry hypotheses as well as the recently-proposed dual benefits hypothesis to better understand the evolution of group-living and cooperative breeding. Furthermore, we consider how individual social circumstances within groups affect dispersal decisions. 3. We examine 11 years of life-history information on a wild population of cooperatively breeding southern pied babblers (Turdoides bicolor). We investigate the effects of ecological conditions, natal-group membership and individual social context on male and female dispersal delays, disperser survival and acquisition of dominance. 4. Female dispersal decisions are generally unconstrained by ecological or social circumstances. In contrast, males disperse in response to relaxed ecological constraints, decreases in nepotistic tolerance, or when low social rank in the queue for dominance decreases their likelihood of gaining a dominant breeding position. Early dispersal by end-of-queue males often leads to a head-of-queue subordinate position in a non-natal group, thereby increasing access to dominant breeding positions. However, males and females remaining in natal groups gain benefits of philopatry via increased survival and, for head-of-queue males, very high likelihood of acquisition of a breeding position. 5. Overall, predictions from the dual benefits hypothesis best describe these results, while some predictions from each of the ecological constraints and benefits of philopatry hypotheses were supported. The benefits of living and working together (collective action benefits) in large stable groups are of central importance in shaping dispersal delays in southern pied babbler societies. In addition, position in the subordinate social queue for dominance is key in determining access to reproduction, particularly for males. This research highlights the importance of considering the costs and benefits of individual social circumstances in dispersal decisions and illustrates how the dual benefits hypothesis offers new perspectives in understanding delayed dispersal.
Data from: Selection and sex-biased dispersal in a coastal shark: the influence of philopatry on adaptive variation
Sex-biased dispersal is expected to homogenize nuclear genetic variation relative to variation in genetic material inherited through the philopatric sex. When site fidelity occurs across a heterogeneous environment, local selective regimes may alter this pattern. We assessed spatial patterns of variation in nuclear-encoded, single nucleotide polymorphisms (SNPs) and sequences of the mitochondrial control region in bonnethead sharks (Sphyrna tiburo), a species thought to exhibit female philopatry, collected from summer habitats used for gestation. Geographic patterns of mtDNA haplotypes and putatively neutral SNPs confirmed female philopatry and male-mediated gene flow along the northeastern coast of the Gulf of Mexico. A total of 30 outlier SNP loci were identified; alleles at over half of these loci exhibited signatures of latitude-associated selection. Our results indicate that in species with sex-biased dispersal, philopatry can facilitate sorting of locally adaptive variation, with the dispersing sex facilitating movement of potentially adaptive variation among locations and environments.
Data from: Individual dispersal decisions in a cooperative breeder: ecological constraints, the benefits of philopatry, and the social queue for dominance
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