scholarly journals RADseq analyses reveal concordant Indian Ocean biogeographic and phylogeographic boundaries in the reef fish Dascyllus trimaculatus

2019 ◽  
Vol 6 (5) ◽  
pp. 172413 ◽  
Author(s):  
E. M. Salas ◽  
G. Bernardi ◽  
M. L. Berumen ◽  
M. R. Gaither ◽  
L. A. Rocha
Keyword(s):  
Indian Ocean ◽  
Red Sea ◽  
Arabian Sea ◽  
Population Level ◽  
Western Indian Ocean ◽  
Genetic Connectivity ◽  
Nucleotide Polymorphisms ◽  
Population Genetic Analysis ◽  
Outlier Loci ◽  
Biogeographic Provinces

Population genetic analysis is an important tool for estimating the degree of evolutionary connectivity in marine organisms. Here, we investigate the population structure of the three-spot damselfish Dascyllus trimaculatus in the Red Sea, Arabian Sea and Western Indian Ocean, using 1174 single nucleotide polymorphisms (SNPs). Neutral loci revealed a signature of weak genetic differentiation between the Northwestern (Red Sea and Arabian Sea) and Western Indian Ocean biogeographic provinces. Loci potentially under selection (outlier loci) revealed a similar pattern but with a much stronger signal of genetic structure between regions. The Oman population appears to be genetically distinct from all other populations included in the analysis. While we could not clearly identify the mechanisms driving these patterns (isolation, adaptation or both), the datasets indicate that population-level divergences are largely concordant with biogeographic boundaries based on species composition. Our data can be used along with genetic connectivity of other species to identify the common genetic breaks that need to be considered for the conservation of biodiversity and evolutionary processes in the poorly studied Western Indian Ocean region.

Reassignments to the Genus Marmorofusus Snyder & Lyons, 2014 (Neogastropoda: Fasciolariidae: Fusininae) of species from the Red Sea, Indian Ocean, and southwestern Australia

Zootaxa ◽  
2019 ◽  
Vol 4714 (1) ◽  
pp. 1-64
Author(s):  
WILLIAM G. LYONS ◽  
MARTIN AVERY SNYDER
Keyword(s):  
Indian Ocean ◽  
Red Sea ◽  
Bay Of Bengal ◽  
Western Indian Ocean ◽  
Species Group ◽  
Junior Synonym ◽  
Southwestern Australia ◽  
Senior Synonym

Twelve species from the Bay of Bengal, the Red Sea, the western Indian Ocean, and southwestern Australia are reclassified in Marmorofusus. These include: Murex undulatus Gmelin, 1791, a senior synonym of Murex variegatus Perry, 1811 and Fusus laticostatus Deshayes, 1831, formerly regarded as a junior synonym of Marmorofusus nicobaricus (Röding, 1798); Murex verrucosus Gmelin, 1791 (synonyms Fusus tuberculatus Anton, 1839 non Lamarck, 1822, F. marmoratus Philippi, 1846 and F. rudicostatus G.B. Sowerby II, 1880); F. polygonoides Lamarck, 1822 (synonym F. biangulatus Deshayes, 1833); F. tuberculatus (Lamarck, 1822) (synonyms Fusus indicus Anton, 1839, F. maculiferus Tapparone Canefri, 1875, Fusinus t. priscai Bozzetti, 2013 and F. t. fuscobandatus Bozzetti, 2017); Fusus philippii Jonas in Philippi, 1846, an earlier name for Fusus tessellatus G.B. Sowerby II, 1880 (other probable synonyms Fusus exilis Menke, 1843, non Conrad, 1832 and Fusinus dampieri Finlay, 1930, replacement name for F. exilis Menke); Fusus oblitus (Reeve, 1847) (synonym Fusus turrispictus Hedley, 1918); F. leptorhynchus Tapparone Canefri, 1875 (synonym F. subquadratus G.B. Sowerby II, 1880), Fusinus vercoi Snyder, 2004; F. wellsi Snyder, 2004; F. brianoi Bozzetti, 2006; F. verbinneni Snyder, 2006; and F. bishopi Petuch & Berschauer, 2017. Fusus toreuma Deshayes, 1843, sometimes misidentified as M. tuberculatus, is a member of the Fusinus colus (Linnaeus, 1758) species group. 

First occurrence of the moray eel Gymnothorax prolatus Sasaki & Amaoka, 1991 (Teleostei: Anguilliformes: Muraenidae) from the northern Indian Ocean

2015 ◽  
Vol 8 ◽  
Author(s):  
Anil Mohapatra ◽  
Dipanjan Ray ◽  
David G. Smith
Keyword(s):  
Indian Ocean ◽  
Arabian Sea ◽  
Western Indian Ocean ◽  
Northern Indian Ocean ◽  
The North ◽  
First Occurrence ◽  
The Indian Ocean ◽  
First Time ◽  
North Western ◽  
Moray Eel

Gymnothorax prolatusis recorded for the first time from the Indian Ocean on the basis of four specimens collected in the Bay of Bengal off India and one from the Arabian Sea off Pakistan. These records extend the range of the species from Taiwan to the north-western Indian Ocean.

Genetic connectivity and historical demography of the blue barred parrotfish (Scarus ghobban) in the western Indian Ocean

2010 ◽  
Vol 157 (7) ◽  
pp. 1475-1487 ◽  
Author(s):  
Shakil Visram ◽  
Ming-Che Yang ◽  
Ruby Moothien Pillay ◽  
Sadri Said ◽  
Oskar Henriksson ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
Historical Demography ◽  
Genetic Connectivity ◽  
Scarus Ghobban

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 Introduction to virtual issue on Red Sea and Western Indian Ocean biogeography

2017 ◽  
Vol 44 (9) ◽  
pp. 1923-1926 ◽  
Author(s):  
Michael L. Berumen ◽  
Joseph D. DiBattista ◽  
Luiz A. Rocha
Keyword(s):  
Indian Ocean ◽  
Red Sea ◽  
Western Indian Ocean

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.

The Archaeological Record of Indian Ocean Engagements in the Red Sea

2017 ◽  
Author(s):  
Eivind Heldaas Seland
Keyword(s):  
Indian Ocean ◽  
Red Sea ◽  
Natural Environment ◽  
Western Indian Ocean ◽  
Archaeological Research ◽  
Archaeological Record ◽  
Islamic Period ◽  
The Indian Ocean ◽  
The Mediterranean ◽  
The Relationship

This chapter reviews the evidence, nature, and development of maritime contacts in the Red Sea and from the Red Sea into the western Indian Ocean from the Neolithic until the start of the Islamic period, c. 4000 BCE–700 CE. In addition to summarizing and highlighting recent archaeological research and ongoing scholarly debates, emphasis is placed on identifying and explaining periods of intensified as well as reduced interaction, and on the relationship between internal Red Sea dynamics and contacts with the Mediterranean and the Indian Ocean worlds in light of climate, natural environment, hinterland interest, and a changing geopolitical situation.

A review of the Acanthopagrus bifasciatus species complex (Pisces: Sparidae) from the Indian Ocean, with redescriptions of A. bifasciatus (Forsskål 1775) and A. catenula (Lacepède 1801) YUKIO IWATSUKI (Japan) & PHILLIP C. HEEMSTRA (South Africa)

Zootaxa ◽  
2011 ◽  
Vol 3025 (1) ◽  
pp. 38 ◽  
Author(s):  
YUKIO IWATSUKI ◽  
PHILLIP C. HEEMSTRA
Keyword(s):  
South Africa ◽  
Indian Ocean ◽  
Red Sea ◽  
Western Indian Ocean ◽  
Valid Species ◽  
Nominal Species ◽  
Southern Population ◽  
Northern Population ◽  
Mascarene Islands ◽  
Colour Patterns

The Doublebar Seabream, Acanthopagrus bifasciatus (Forsskål 1775) with two conspicuous vertical black bars across the head has long been recognized as a distinctive species from the Red Sea and Western Indian Ocean. Two distinct colour patterns are associated with two allopatric populations except southern Oman and Somalia which appears to be a zone of overlap: a northern population (Red Sea, through Persian Gulf, to Pakistan) with dorsal and caudal fins immaculate yellow; and a southern population (east coast of Africa from the Horn of Africa to South Africa, Madagascar, and Mascarene Islands) having the dorsal fin with a wide black margin and caudal fin rear margin with a narrow black edge (and both black margins disappearing with growth in specimens over 30 cm SL). Both populations resulted in the two valid species: A. bifasciatus for the northern population and A. catenula (Lacepède 1801) for the southern population. Nominal species (junior synonyms) of the two species are discussed.

scholarly journals Marine Reservoir Correction for the Cocos (Keeling) Islands, Indian Ocean

Radiocarbon ◽  
2004 ◽  
Vol 46 (2) ◽  
pp. 603-610 ◽  
Author(s):  
Quan Hua ◽  
Colin D Woodroffe ◽  
Mike Barbetti ◽  
Scott G Smithers ◽  
Ugo Zoppi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Indian Ocean ◽  
Red Sea ◽  
Surface Waters ◽  
Accelerator Mass Spectrometry ◽  
Arabian Sea ◽  
Indonesian Throughflow ◽  
Gulf Of Aden ◽  
The Indian Ocean ◽  
Reservoir Age

Known-age corals from the Cocos (Keeling) Islands, Indian Ocean, have been analyzed by accelerator mass spectrometry (AMS) for radiocarbon to determine marine reservoir age corrections. The ΔR value for the Cocos (Keeling) Islands is 66 ± 12 yr based on the analyses undertaken for this study. When our AMS and previously published dates for Cocos are averaged, they yield a ΔR of 64 ± 15 yr. This is a significant revision of an earlier estimate of the ΔR value for the Cocos (Keeling) Islands of 186 ± 66 yr (Toggweiler et al. 1991). The (revised) lower ΔR for the Cocos (Keeling) Islands is consistent with GEOSECS 14C data for the Indian Ocean, and previously published bomb 14C data for the Red Sea, Gulf of Aden, and Cocos Islands. The revised ΔR is also close to values for the eastern Indian Ocean and adjacent seas. These suggest surface waters that reach the Cocos Islands might be partly derived from the far western Pacific, via the Indonesian throughflow, and might not be influenced by the southeast flow from the Arabian Sea.

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