scholarly journals Fine-scale genetic structuring in a group-living lizard, the gidgee skink (Egernia stokesii )

2020 ◽  
Vol 45 (4) ◽  
pp. 435-443
Author(s):  
Sarah K. Pearson ◽  
Gregory R. Johnston ◽  
C. Michael Bull ◽  
Aaron L. Fenner ◽  
Michael G. Gardner
Keyword(s):  
Group Living ◽  
Fine Scale ◽  
Genetic Structuring ◽  
Egernia Stokesii

Fine-scale genetic diversity and landscape-scale genetic structuring in three foundational bulrush species: implications for wetland revegetation

2018 ◽  
Vol 27 (2) ◽  
pp. 408-420 ◽  
Author(s):  
Karin M. Kettenring ◽  
Bret N. Mossman ◽  
Rebekah Downard ◽  
Karen E. Mock
Keyword(s):  
Genetic Diversity ◽  
Landscape Scale ◽  
Fine Scale ◽  
Genetic Structuring

Fine-scale population genetic structuring of bottlenose dolphins in Irish coastal waters

2011 ◽  
Vol 14 (4) ◽  
pp. 342-353 ◽  
Author(s):  
L. Mirimin ◽  
R. Miller ◽  
E. Dillane ◽  
S. D. Berrow ◽  
S. Ingram ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Population Genetic ◽  
Bottlenose Dolphins ◽  
Fine Scale ◽  
Genetic Structuring ◽  
Scale Population

Larger lizards live longer in the group-living Egernia stokesii

2016 ◽  
Vol 64 (3) ◽  
pp. 182 ◽  
Author(s):  
S. K. Pearson ◽  
S. S. Godfrey ◽  
C. M. Bull ◽  
M. G. Gardner
Keyword(s):  
Site Fidelity ◽  
Group Living ◽  
Space Use ◽  
Limited Attention ◽  
Field Surveys ◽  
Evolution Of Sociality ◽  
Short Period ◽  
Recent Attention ◽  
Egernia Stokesii

Animal space use has implications for gene flow, disease dynamics, mating systems and the evolution of sociality. Given recent attention to sociality in reptiles, lizards are an important group for expanding our understanding of animal space use. Lizard space use is commonly investigated within one population over a short period and limited attention has been given to potential predictors of site fidelity. This study evaluated site fidelity in three populations of group-living Egernia stokesii (gidgee skink) between two field surveys separated by almost a decade. Of 43 recaptured lizards, 28 (65%) occupied their original space, and 15 (36%) of those shared their space with the same other lizard or lizards in both surveys. This confirmed long-term site and social bond fidelity in E. stokesii. We found that larger lizards were more likely to be recaptured. Neither body size, individual genetic heterozygosity, nor the availability of refuges strongly predicted whether lizards were recaptured in the same or a different place. The reasons why some lizards stayed in the same space while others moved are yet to be resolved.

scholarly journals Genetic diversity of Nile tilapia (Oreochromis niloticus) throughout West Africa

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Curtis E. Lind ◽  
Seth K. Agyakwah ◽  
Felix Y. Attipoe ◽  
Christopher Nugent ◽  
Richard P. M. A. Crooijmans ◽  
...  
Keyword(s):  
Genetic Structure ◽  
West Africa ◽  
Genetic Resources ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Spatial Genetic Structure ◽  
River Basins ◽  
Fine Scale ◽  
Genetic Structuring ◽  
Volta Basin

AbstractNile tilapia (Oreochromis niloticus) is a globally significant aquaculture species rapidly gaining status as a farmed commodity. In West Africa, wild Nile tilapia genetic resources are abundant yet knowledge of fine-scale population structure and patterns of natural genetic variation are limited. Coinciding with this is a burgeoning growth in tilapia aquaculture in Ghana and other countries within the region underpinned by locally available genetic resources. Using 192 single nucleotide polymorphism (SNP) markers this study conducted a genetic survey of Nile tilapia throughout West Africa, sampling 23 wild populations across eight countries (Benin, Burkina Faso, Côte d’Ivoire, Ghana, Togo, Mali, Gambia and Senegal), representing the major catchments of the Volta, Niger, Senegal and Gambia River basins. A pattern of isolation-by-distance and significant spatial genetic structure was identified throughout West Africa (Global FST = 0.144), which largely corresponds to major river basins and, to a lesser extent, sub-basins. Two populations from the Gambia River (Kudang and Walekounda), one from the western Niger River (Lake Sélingué) and one from the upper Red Volta River (Kongoussi) showed markedly lower levels of diversity and high genetic differentiation compared to all other populations, suggesting genetically isolated populations occurring across the region. Genetic structure within the Volta Basin did not always follow the pattern expected for sub-river basins. This study identifies clear genetic structuring and differentiation amongst West African Nile tilapia populations, which concur with broad patterns found in previous studies. In addition, we provide new evidence for fine-scale genetic structuring within the Volta Basin and previously unidentified genetic differences of populations in Gambia. The 192 SNP marker suite used in this study is a useful tool for differentiating tilapia populations and we recommend incorporating this marker suite into future population screening of O. niloticus. Our results form the basis of a solid platform for future research on wild tilapia genetic resources in West Africa, and the identification of potentially valuable germplasm for use in ongoing breeding programs for aquaculture.

RAD genotyping reveals fine-scale genetic structuring and provides powerful population assignment in a widely distributed marine species, the American lobster (Homarus americanus)

2015 ◽  
Vol 24 (13) ◽  
pp. 3299-3315 ◽  
Author(s):  
Laura Benestan ◽  
Thierry Gosselin ◽  
Charles Perrier ◽  
Bernard Sainte-Marie ◽  
Rémy Rochette ◽  
...  
Keyword(s):  
Marine Species ◽  
Homarus Americanus ◽  
American Lobster ◽  
Fine Scale ◽  
Population Assignment ◽  
Genetic Structuring

Fine-scale genetic structuring on Manacus manacus leks

Nature ◽  
2000 ◽  
Vol 408 (6810) ◽  
pp. 352-353 ◽  
Author(s):  
Lisa Shorey ◽  
Stuart Piertney ◽  
Jon Stone ◽  
Jacob Höglund
Keyword(s):  
Fine Scale ◽  
Genetic Structuring ◽  
Manacus Manacus

High levels of genetic monogamy in the group-living Australian lizard Egernia stokesii

2002 ◽  
Vol 11 (9) ◽  
pp. 1787-1794 ◽  
Author(s):  
M. G. Gardner ◽  
C. M. Bull ◽  
S. J. B. Cooper
Keyword(s):  
Group Living ◽  
Genetic Monogamy ◽  
Egernia Stokesii

Fine-scale spatial structuring as an inbreeding avoidance mechanism in the social skink Egernia stokesii

2012 ◽  
Vol 60 (4) ◽  
pp. 272 ◽  
Author(s):  
M. G. Gardner ◽  
S. S. Godfrey ◽  
A. L. Fenner ◽  
S. C. Donnellan ◽  
C. M. Bull
Keyword(s):  
Group Living ◽  
South Australia ◽  
Inbreeding Avoidance ◽  
Genotype Data ◽  
Flinders Ranges ◽  
The Social ◽  
Opposite Sex ◽  
Living Species ◽  
Behavioural Mechanism ◽  
Egernia Stokesii

Egernia stokesii is a monogamous and group-living species of Australian scincid lizard. We used genotype data from 10 microsatellite loci to examine evidence for sex-biased dispersal and kin-based discrimination as mechanisms for inbreeding avoidance of E. stokesii within seven rocky outcrops in the southern Flinders Ranges of South Australia. We also examined the relatedness of individuals observed using the same crevice within groups. We found no evidence for sex-biased dispersal at these sites, but found that adult lizards of the opposite sex observed using the same crevice were less related to each other than expected by chance. Our results suggest a behavioural mechanism for minimising inbreeding in large related aggregations of this species.

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