scholarly journals Genetic connectivity and population structure of African savanna elephants ( Loxodonta africana ) in Tanzania

2020 ◽  
Vol 10 (20) ◽  
pp. 11069-11089
Author(s):  
George G. Lohay ◽  
Thomas Casey Weathers ◽  
Anna B. Estes ◽  
Barbara C. McGrath ◽  
Douglas R. Cavener
Keyword(s):  
Population Structure ◽  
Loxodonta Africana ◽  
Genetic Connectivity ◽  
African Savanna

FATAL ENCEPHALOMYOCARDITIS VIRUS INFECTION IN AN AFRICAN SAVANNA ELEPHANT (LOXODONTA AFRICANA) IN A FRENCH ZOO

2015 ◽  
Vol 46 (2) ◽  
pp. 393-396 ◽  
Author(s):  
Benjamin Lamglait ◽  
Antoine Joris ◽  
Aurore Romey ◽  
Labib Bakkali-Kassimi ◽  
Karin Lemberger
Keyword(s):  
Virus Infection ◽  
Loxodonta Africana ◽  
Encephalomyocarditis Virus ◽  
African Savanna ◽  
Savanna Elephant

scholarly journals Ixodid ticks (Acari: Ixodidae) collected from African savanna elephants (Loxodonta africana) and African forest elephants (Loxodonta cyclotis)

2019 ◽  
Vol 86 (1) ◽  
Author(s):  
Edward Kariuki ◽  
Hellen Kutima ◽  
Michael Kock ◽  
Ivan G. Horak ◽  
Roaland Jooste ◽  
...  
Keyword(s):  
Loxodonta Africana ◽  
Ixodid Ticks ◽  
African Savanna ◽  
Forest Elephants ◽  
Loxodonta Cyclotis

scholarly journals Structure and phylogeography of two tropical predators, spinner ( Stenella longirostris ) and pantropical spotted ( S. attenuata ) dolphins, from SNP data

2018 ◽  
Vol 5 (4) ◽  
pp. 171615 ◽  
Author(s):  
Matthew S. Leslie ◽  
Phillip A. Morin
Keyword(s):  
Population Structure ◽  
Pacific Ocean ◽  
Nuclear Dna ◽  
Population Level ◽  
Genetic Connectivity ◽  
Nucleotide Polymorphisms ◽  
Stenella Longirostris ◽  
Spinner Dolphin ◽  
Spinner Dolphins ◽  
Almost All

Little is known about global patterns of genetic connectivity in pelagic dolphins, including how circumtropical pelagic dolphins spread globally following the rapid and recent radiation of the subfamily delphininae. In this study, we tested phylogeographic hypotheses for two circumtropical species, the spinner dolphin ( Stenella longirostris ) and the pantropical spotted dolphin ( Stenella attenuata ), using more than 3000 nuclear DNA single nucleotide polymorphisms (SNPs) in each species. Analyses for population structure indicated significant genetic differentiation between almost all subspecies and populations in both species. Bayesian phylogeographic analyses of spinner dolphins showed deep divergence between Indo-Pacific, Atlantic and eastern tropical Pacific Ocean (ETP) lineages. Despite high morphological variation, our results show very close relationships between endemic ETP spinner subspecies in relation to global diversity. The dwarf spinner dolphin is a monophyletic subspecies nested within a major clade of pantropical spinner dolphins from the Indian and western Pacific Ocean populations. Population-level division among the dwarf spinner dolphins was detected—with the northern Australia population being very different from that in Indonesia. In contrast to spinner dolphins, the major boundary for spotted dolphins is between offshore and coastal habitats in the ETP, supporting the current subspecies-level taxonomy. Comparing these species underscores the different scale at which population structure can arise, even in species that are similar in habitat (i.e. pelagic) and distribution.

scholarly journals Genome Assembly of the Roundjaw Bonefish (Albula glossodonta), a Vulnerable Circumtropical Sportfish

2021 ◽  
Author(s):  
Brandon D. Pickett ◽  
Sheena Talma ◽  
Jessica R. Glass ◽  
Daniel Ence ◽  
Paul D. Cowley ◽  
...  
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Indian Ocean ◽  
Genome Assembly ◽  
Anthropogenic Activities ◽  
Western Indian Ocean ◽  
Genetic Connectivity ◽  
High Quality ◽  
Widespread Species ◽  
High Quality Genome

ABSTRACTBackgroundBonefishes are cryptic species indiscriminately targeted by subsistence and recreational fisheries worldwide. The roundjaw bonefish, Albula glossodonta is the most widespread bonefish species in the Indo-Pacific and is listed as vulnerable to extinction by the IUCN’s Red List due to anthropogenic activities. Whole-genome datasets allow for improved population and species delimitation, which – prior to this study – were lacking for Albula species.ResultsWe generated a high-quality genome assembly of an A. glossodonta individual from Hawai‘i, USA. The assembled contigs had an NG50 of 4.75 Mbp and a maximum length of 28.2 Mbp. Scaffolding yielded an NG50 of 14.49 Mbp, with the longest scaffold reaching 42.29 Mbp. Half the genome was contained in 20 scaffolds. The genome was annotated with 28.3 K protein-coding genes. We then analyzed 66 A. glossodonta individuals and 38,355 SNP loci to evaluate population genetic connectivity between six atolls in Seychelles and Mauritius in the Western Indian Ocean. We observed genetic homogeneity between atolls in Seychelles and evidence of reduced gene flow between Seychelles and Mauritius. The South Equatorial Current could be one mechanism limiting gene flow of A. glossodonta populations between Seychelles and Mauritius.ConclusionsQuantifying the spatial population structure of widespread fishery species such as bonefishes is necessary for effective transboundary management and conservation. This population genomic dataset mapped to a high-quality genome assembly allowed us to discern shallow population structure in a widespread species in the Western Indian Ocean. The genome assembly will be useful for addressing the taxonomic uncertainties of bonefishes globally.

scholarly journals Strong horizontal and vertical connectivity in the coral Pocillopora verrucosa from Ludao, Taiwan, a small oceanic island

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0258181
Author(s):  
Stéphane de Palmas ◽  
Derek Soto ◽  
Ming-Jay Ho ◽  
Vianney Denis ◽  
Chaolun Allen Chen
Keyword(s):  
Population Structure ◽  
Larval Dispersal ◽  
Oceanic Island ◽  
Genetic Connectivity ◽  
Eastern Coast ◽  
Genetic Clustering ◽  
The Right ◽  
Depth Ranges ◽  
Pocillopora Verrucosa ◽  
F Statistics

Mesophotic habitats could be sheltered from natural and anthropogenic disturbances and act as reproductive refuges, providing propagules to replenish shallower populations. Molecular markers can be used as proxies evaluating the connectivity and inferring population structure and larval dispersal. This study characterizes population structure as well as horizontal and vertical genetic connectivity of the broadcasting coral Pocillopora verrucosa from Ludao, a small oceanic island off the eastern coast of Taiwan. We genotyped 75 P. verrucosa specimens from three sites (Gongguan, Dabaisha, and Guiwan) at three depth ranges (Shallow: 7–15 m, Mid-depth: 23–30 m, and Deep: 38–45 m), spanning shallow to upper mesophotic coral reefs, with eight microsatellite markers. F-statistics showed a moderate differentiation (FST = 0.106, p<0.05) between two adjacent locations (Dabaisha 23–30 and Dabaisha 38–45 m), but no differentiation elsewhere, suggesting high levels of connectivity among sites and depths. STRUCTURE analysis showed no genetic clustering among sites or depths, indicating that all Pocillopora individuals could be drawn from a single panmictic population. Simulations of recent migration assigned 30 individuals (40%) to a different location from where they were collected. Among them, 1/3 were assigned to deeper locations, 1/3 to shallower populations and 1/3 were assigned to the right depth but a different site. These results suggest high levels of vertical and horizontal connectivity, which could enhance the recovery of P. verrucosa following disturbances around Ludao, a feature that agrees with demographic studies portraying this species as an opportunistic scleractinian.

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