Fine-scale spatiotemporal patterns of genetic variation reflect budding dispersal coupled with strong natal philopatry in a cooperatively breeding mammal

2012 ◽  
Vol 21 (21) ◽  
pp. 5348-5362 ◽  
Author(s):  
Hazel J. Nichols ◽  
Neil R. Jordan ◽  
Gabriel A. Jamie ◽  
Michael A. Cant ◽  
Joseph I. Hoffman
Keyword(s):  
Genetic Variation ◽  
Spatiotemporal Patterns ◽  
Fine Scale ◽  
Natal Philopatry ◽  
Cooperatively Breeding

Plasticity in sexual size dimorphism and Rensch’s rule in Mediterranean blennies (Blenniidae)

2008 ◽  
Vol 86 (10) ◽  
pp. 1173-1178 ◽  
Author(s):  
W. Lengkeek ◽  
K. Didderen ◽  
I. M. Côté ◽  
E. M. van der Zee ◽  
R. C. Snoek ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Sexual Size Dimorphism ◽  
Fine Scale ◽  
Evolutionary Patterns ◽  
Rensch’S Rule ◽  
Size Dimorphism ◽  
Rensch's Rule ◽  
Close Proximity ◽  
Species Comparisons ◽  
Aidablennius Sphynx

Comparative analyses of sexual size dimorphism (SSD) across species have led to the discovery of Rensch’s rule. This rule states that SSD increases with body size when males are the largest sex, but decreases with increasing size when females are larger. Within-species comparisons of SSD in fish are rare, yet these may be a valuable tool to investigate evolutionary patterns on a fine scale. This study compares SSD among closely related populations of three species of Mediterranean blennies (Blenniidae): Microlipophrys canevae (Vinciguerra, 1880), Parablennius incognitus (Bath 1968), and Aidablennius sphynx (Valenciennes, 1836). SSD varied more among populations than among species and Rensch’s rule was confirmed within two species. It is not likely that the variation among populations in SSD mirrors genetic variation, as many of the populations were in close proximity of one another, with a high potential for genetic exchange. This study complements larger scale analyses of other taxa and demonstrates the fine scale on which evolutionary processes responsible for Rensch’s rule may be operating.

scholarly journals Fine-Scale Population Structure but Limited Genetic Differentiation in a Cooperatively Breeding Paper Wasp

2020 ◽  
Vol 12 (5) ◽  
pp. 701-714 ◽  
Author(s):  
Sarah E Bluher ◽  
Sara E Miller ◽  
Michael J Sheehan
Keyword(s):  
Population Structure ◽  
Genetic Differentiation ◽  
Cooperative Breeding ◽  
Isolation By Distance ◽  
Spatial Scales ◽  
Paper Wasp ◽  
Paper Wasps ◽  
Natal Philopatry ◽  
Continental Scale ◽  
Cooperatively Breeding

Abstract Relatively little is known about the processes shaping population structure in cooperatively breeding insect species, despite the long-hypothesized importance of population structure in shaping patterns of cooperative breeding. Polistes paper wasps are primitively eusocial insects, with a cooperative breeding system in which females often found nests in cooperative associations. Prior mark-recapture studies of Polistes have documented extreme female philopatry, although genetic studies frequently fail to detect the strong population structure expected for highly philopatric species. Together these findings have led to lack of consensus on the degree of dispersal and population structure in these species. This study assessed population structure of female Polistes fuscatus wasps at three scales: within a single site, throughout Central New York, and across the Northeastern United States. Patterns of spatial genetic clustering and isolation by distance were observed in nuclear and mitochondrial genomes at the continental scale. Remarkably, population structure was evident even at fine spatial scales within a single collection site. However, P. fuscatus had low levels of genetic differentiation across long distances. These results suggest that P. fuscatus wasps may employ multiple dispersal strategies, including extreme natal philopatry as well as longer-distance dispersal. We observed greater genetic differentiation in mitochondrial genes than in the nuclear genome, indicative of increased dispersal distances in males. Our findings support the hypothesis that limited female dispersal contributes toward population structure in paper wasps.

scholarly journals Fine-scale genetic structure and dispersal in cooperatively breeding apostlebirds

2006 ◽  
Vol 15 (11) ◽  
pp. 3139-3146 ◽  
Author(s):  
IAIN A. WOXVOLD ◽  
GREG J. ADCOCK ◽  
RAOUL A. MULDER
Keyword(s):  
Genetic Structure ◽  
Fine Scale ◽  
Cooperatively Breeding

scholarly journals Prolactin and the regulation of parental care and helping behavior in cooperatively breeding white-browed sparrow weaver societies

2021 ◽  
Author(s):  
Lindsay A Walker ◽  
Linda Tschirren ◽  
Jennifer E York ◽  
Peter J Sharp ◽  
Simone L Meddle ◽  
...  
Keyword(s):  
Parental Care ◽  
Cooperative Breeding ◽  
Natural Variation ◽  
Underlying Mechanism ◽  
Helping Behavior ◽  
Fine Scale ◽  
Physiological Mechanisms ◽  
Nestling Provisioning ◽  
Cooperatively Breeding ◽  
Nestling Feeding

In many cooperatively breeding societies non-breeding individuals help to rear the offspring of breeders. The physiological mechanisms that regulate such cooperative helping behavior are poorly understood, but may have been co-opted, during the evolution of cooperative breeding, from pre-existing mechanisms that regulated parental care. Key among these may be a role for prolactin. Here we investigate whether natural variation in circulating prolactin levels predicts both parental and helper contributions to nestling provisioning in cooperatively breeding white-browed sparrow weavers, Plocepasser mahali. In sparrow weaver groups, a single dominant pair monopolize reproduction and non-breeding subordinates help with nestling feeding. We show that: (i) among parents, dominant females feed nestlings at higher rates, make longer provisioning visits and have higher prolactin levels than dominant males; and (ii) among subordinates, engaged in cooperative helping behavior, those within their natal groups feed nestlings at higher rates and have higher prolactin levels than immigrants. Moreover, continuous variation in prolactin levels positively predicts nestling-provisioning rates and mean provisioning visit durations when all bird classes are combined. These relationships are principally driven by differences among bird classes in both circulating prolactin levels and provisioning traits; the more limited within-class variation in prolactin and provisioning traits were not evidently correlated, highlighting a likely role for additional mechanisms in the fine-scale regulation of care. Our findings broadly support the hypothesis that parental care and cooperative helping behavior are regulated by a common underlying mechanism and highlight the need for experimentation to now establish the causality of any role for prolactin.

scholarly journals Fine-scale genetic structure and helping decisions in a cooperatively breeding bird

2018 ◽  
Vol 27 (7) ◽  
pp. 1714-1726 ◽  
Author(s):  
Amy E. Leedale ◽  
Stuart P. Sharp ◽  
Michelle Simeoni ◽  
Elva J. H. Robinson ◽  
Ben J. Hatchwell
Keyword(s):  
Genetic Structure ◽  
Fine Scale ◽  
Breeding Bird ◽  
Cooperatively Breeding

scholarly journals Linked-read sequencing of gametes allows efficient genome-wide analysis of meiotic recombination

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Hequan Sun ◽  
Beth A. Rowan ◽  
Pádraic J. Flood ◽  
Ronny Brandt ◽  
Janina Fuss ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Chromosome Segregation ◽  
Meiotic Recombination ◽  
Whole Genome ◽  
Fine Scale ◽  
Simultaneous Generation ◽  
Genome Wide Analysis ◽  
Recombinant Plant ◽  
Genome Wide ◽  
Large Populations

Abstract Meiotic crossovers (COs) ensure proper chromosome segregation and redistribute the genetic variation that is transmitted to the next generation. Large populations and the demand for genome-wide, fine-scale resolution challenge existing methods for CO identification. Taking advantage of linked-read sequencing, we develop a highly efficient method for genome-wide identification of COs at kilobase resolution in pooled recombinants. We first test this method using a pool of Arabidopsis F2 recombinants, and recapitulate results obtained from the same plants using individual whole-genome sequencing. By applying this method to a pool of pollen DNA from an F1 plant, we establish a highly accurate CO landscape without generating or sequencing a single recombinant plant. The simplicity of this approach enables the simultaneous generation and analysis of multiple CO landscapes, accelerating the pace at which mechanisms for the regulation of recombination can be elucidated through efficient comparisons of genotypic and environmental effects on recombination.

High levels of local inter- and intra-host genetic variation of West Nile virus and evidence of fine-scale evolutionary pressures

2017 ◽  
Vol 51 ◽  
pp. 219-226 ◽  
Author(s):  
Dylan J. Ehrbar ◽  
Kiet A. Ngo ◽  
Scott R. Campbell ◽  
Laura D. Kramer ◽  
Alexander T. Ciota
Keyword(s):  
Genetic Variation ◽  
West Nile Virus ◽  
Fine Scale ◽  
West Nile ◽  
Host Genetic

scholarly journals Fine-scale genetic variation and evolution of West Nile Virus in a transmission “hot spot” in suburban Chicago, USA

Virology ◽  
2008 ◽  
Vol 374 (2) ◽  
pp. 381-389 ◽  
Author(s):  
Luigi Bertolotti ◽  
Uriel D. Kitron ◽  
Edward D. Walker ◽  
Marilyn O. Ruiz ◽  
Jeffrey D. Brawn ◽  
...  
Keyword(s):  
Genetic Variation ◽  
West Nile Virus ◽  
Hot Spot ◽  
Fine Scale ◽  
West Nile

Fine-scale ecological and genetic variation in a Chorthippus grasshopper hybrid zone

2002 ◽  
Vol 27 (4) ◽  
pp. 499-504 ◽  
Author(s):  
Jon R. Bridle ◽  
John Vass-De-Zomba ◽  
Roger K. Butlin
Keyword(s):  
Genetic Variation ◽  
Hybrid Zone ◽  
Fine Scale

scholarly journals Inclusive-fitness logic of cooperative breeding with benefits of natal philopatry

2014 ◽  
Vol 369 (1642) ◽  
pp. 20130361 ◽  
Author(s):  
Geoff Wild ◽  
Cody Koykka
Keyword(s):  
Computer Simulation ◽  
Life History ◽  
Cooperative Breeding ◽  
Inclusive Fitness ◽  
Social Groups ◽  
Reproductive Skew ◽  
Natal Philopatry ◽  
Evolutionary Transition ◽  
Model Predictions ◽  
Cooperatively Breeding

In cooperatively breeding species, individuals help to raise offspring that are not their own. We use two inclusive-fitness models to study the advantage of this kind of helpful behaviour in social groups with high reproductive skew. Our first model does not allow for competition among relatives to occur but our second model does. Specifically, our second model assumes a competitive hierarchy among nest-mates, with non-breeding helpers ranked higher than their newborn siblings. For each model, we obtain an expression for the change in inclusive fitness experienced by a helpful individual in a selfish population. The prediction suggested by each expression is confirmed with computer simulation. When model predictions are compared to one another, we find that helping emerges under a broader range of conditions in the second model. Although competition among kin occurs in our second model, we conclude that the life-history features associated with this competition also act to promote the evolutionary transition from solitary to cooperative breeding.

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