Hydroids (Cnidaria: Hydrozoa) from Tristan da Cunha and St. Helena

2015 ◽  
Vol 8 ◽  
Author(s):  
Horia R. Galea
Keyword(s):  
Shallow Water ◽  
New Records ◽  
Present Report ◽  
Tristan Da Cunha ◽  
Gough Island ◽  
The Common ◽  
St Helena ◽  
World Records ◽  
Second World

The present report provides the first account of the shallow water hydroids of St. Helena, which comprises 17 species, and adds nine new records to the hydrozoan fauna of the Tristan da Cunha group of islands, raising their number to 34. A total of 34 species, belonging to five families of Anthoathecata and eight families of Thecata, are discussed herein. Although distributional data are given for each species, brief diagnoses are provided for the lesser known or unidentifiable species, and the common taxa are occasionally accompanied by succinct remarks. Illustrations are provided for nearly all species in order to justify their identification and to facilitate identification by others.Fiordlandia protectaandFilellum bouvetensis,both from Gough Island, represent the second world records and extend their known area of distribution.

Notes on a small collection of thecate hydroids (Cnidaria: Hydrozoa)from Tristan da Cunha, south Atlantic

Zootaxa ◽  
2010 ◽  
Vol 2336 (1) ◽  
pp. 1 ◽  
Author(s):  
HORIA R. GALEA
Keyword(s):  
Shallow Water ◽  
Morphological Variation ◽  
New Records ◽  
Present Report ◽  
Species Level ◽  
Present Species ◽  
Pilot Survey ◽  
Tristan Da Cunha ◽  
Small Collection ◽  
First Time

A pilot survey of the shallow-water, thecate hydroid fauna of Tristan da Cunha archipelago, was undertaken for the first time. The examination of the collected material revealed the presence of at least sixteen hydroids, of which three could not be identified to species level in the absence of fertile specimens. Two sympatric morphotypes, provisionally assigned to Halecium delicatulum Coughtrey, 1876, are described, along with a discussion on the astonishingly wide morphological variation attributed to this taxon. All the present species are illustrated, and some of them are either described or accompanied by brief remarks. Only twelve hydroids were previously reported from the study area and the present report adds eleven new records to the list of known species, bringing their number to twenty-three.

scholarly journals Shallow-water scleractinian corals of Ascension Island, Central South Atlantic

2014 ◽  
Vol 97 (4) ◽  
pp. 713-725 ◽  
Author(s):  
Helmut Zibrowius ◽  
Peter Wirtz ◽  
Flavia L.D. Nunes ◽  
Bert W. Hoeksema ◽  
Francesca Benzoni
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
New Records ◽  
Nearest Neighbour ◽  
Western Atlantic ◽  
Previous Record ◽  
Ascension Island ◽  
The Family ◽  
St Helena ◽  
Central South

The presence of five shallow-water scleractinian species at Ascension Island is confirmed, i.e. Favia gravida, Madracis sp., Siderastrea radians, Polycyathus atlanticus and Rhizosmilia gerdae. The three former are zooxanthellate, the two latter azooxanthellate. A sixth species, Cladocora debilis (azooxanthellate), dredged from moderately deep water is also expected to occur in shallow water. Madracis sp. and P. atlanticus are new records for the island. A previous record of Astrangia solitaria at Ascension is now referred to as P. atlanticus. Favia gravida, S. radians and C. debilis are amphi-Atlantic. Rhizosmilia gerdae is currently known only from Ascension Island and the Western Atlantic. None of the species are endemic to Ascension Island. No member of the family Dendrophylliidae has as yet been found at Ascension, whereas that family is represented at its nearest neighbour, St Helena Island.

scholarly journals Introduced Fishmoths identified from South Atlantic Tristan da Cunha Island (Thysanura: Lepismatidae).

2009 ◽  
Vol 59 (2) ◽  
pp. 527-533
Author(s):  
Christine Hänel ◽  
John Irish
Keyword(s):  
South Atlantic ◽  
Tristan Da Cunha ◽  
Gough Island ◽  
St Helena

Zwei weltweit verbreitete Lepismatidae-Arten, die auf der Süd-Atlantischen Insel von Tristan da Cunha gesammelt wurden, sind identifiziert. Damit wird bestätigt das Vertreter der Ordnung Thysanura (Borstenschwänze) dorthin eingeschleppt worden sind. In der Fauna des Archipels Tristan da Cunhas und anderer, weiter südlich liegenden Inseln, sind einheimische Thysanura-Arten nicht bekannt. Im Gegensatz hierzu existieren einige Arten auf den Inseln St. Helena und Ascension. Deren geographische Lage sowie deren politische und soziale Verbindungen zu Tristan da Cunha stehen mit der Ausbreitung im Zusammenhang. Borstenschwänze werden hauptsächlich durch den Handel verbreitet. Im Falle von Tristan da Cunha verstärkt der zunehmende Tourismus die Einschleppung. Um weitere Probleme durch Import fremder Arten zu verhindern, wird der Aufbau eines Quarantänesystems vorgeschlagen, dass für den ankommenden Schiffsverkehr zuständig sein sollte.StichwörterThysanura, Lepismatidae, Lepisma, Ctenolepisma, Fishmoth, Silverfish, Tristan da Cunha, Gough Island, South Atlantic, introduction.

scholarly journals A juvenile Tristan albatross (Diomedea dabbenena) on land at the Crozet Islands

Polar Biology ◽  
2020 ◽  
Author(s):  
Alexander L. Bond ◽  
Christopher Taylor ◽  
David Kinchin-Smith ◽  
Derren Fox ◽  
Emma Witcutt ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Cytochrome B ◽  
Adult Male ◽  
Mitochondrial Gene ◽  
Small Population ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Tristan Da Cunha ◽  
Gough Island ◽  
Dispersal Events

AbstractAlbatrosses and other seabirds are generally highly philopatric, returning to natal colonies when they achieve breeding age. This is not universal, however, and cases of extraordinary vagrancy are rare. The Tristan Albatross (Diomedea dabbenena) breeds on Gough Island in the South Atlantic Ocean, with a small population on Inaccessible Island, Tristan da Cunha, ca 380 km away. In 2015, we observed an adult male albatross in Gonydale, Gough Island, which had been ringed on Ile de la Possession, Crozet Islands in 2009 when it was assumed to be an immature Wandering Albatross (D. exulans). We sequenced 1109 bp of the cytochrome b mitochondrial gene from this bird, and confirmed it to be a Tristan Albatross, meaning its presence on Crozet 6 years previous, and nearly 5000 km away, was a case of prospecting behaviour in a heterospecific colony. Given the challenges in identifying immature Diomedea albatrosses, such dispersal events may be more common than thought previously.

scholarly journals Contrasting Histories of Three Gene Regions Associated With In(3L)Payne of Drosophila melanogaster

Genetics ◽  
1996 ◽  
Vol 144 (4) ◽  
pp. 1565-1575 ◽  
Author(s):  
Esteban Hasson ◽  
Walter F Eanes
Keyword(s):  
Drosophila Melanogaster ◽  
Sequence Variation ◽  
Present Report ◽  
Genetic Exchange ◽  
Nucleotide Variation ◽  
Distal Breakpoint ◽  
Esterase 6 ◽  
The Common ◽  
Neutrality Tests ◽  
Hsp83 Gene

In the present report, we studied nucleotide variation in three gene regions of Drosophila melanogaster, spanning >5 kb and showing different degrees of association with the cosmopolitan inversion In(3-L)Payne. The analysis of sequence variation in the regions surrounding the breakpoints and the heat shock 83 (Hsp83) gene locus, located close to the distal breakpoint, revealed the absence of shared polymorphisms and the presence of a number of fixed differences between arrangements, indicating absence of genetic exchange. In contrast, for the esterase-6 gene region, located in the center of the inversion, we observed the presence of shared polymorphisms between arrangements suggesting genetic exchange. In the regions close to the breakpoints, the common St arrangement is 10 times more polymorphic than inverted chromosomes. We propose that the lack of recombination between arrangements in these regions coupled with genetic hitchhiking is the best explanation for the low heterozygosity observed in inverted lines. Using the data for the breakpoints, we estimate that this inversion polymorphism is around 0.36 million yr old. Although it is widely accepted that inversions are examples of balanced polymorphisms, none of the current neutrality tests including our Monte Carlo simulations showed significant departure from neutral expectations.

New records of the mites Geckobia bataviensis Vitzthum, 1926 and Pterygosoma dracoensis Jack, 1962 (Trombidiformes: Pterygosomatidae) from Timor-Leste

2021 ◽  
Vol 3 ◽  
pp. ec03041
Author(s):  
Fernando de C. Jacinavicius ◽  
Ricardo Bassini-Silva ◽  
Fabrício H. Oda ◽  
Hinrich Kaiser
Keyword(s):  
New Records ◽  
Timor Leste ◽  
The Common ◽  
Hemidactylus Frenatus ◽  
Common House

We report on the presence of scale mites (Trombidiformes: Pterygosomatidae) parasitizing three species of lizards in Timor-Leste. Geckobia bataviensis Vitzthum, 1926 was found associated with the Common House Gecko, Hemidactylus frenatus Duméril & Bibron, 1836, and the Indopacific Tree Gecko, Hemiphyllodactylus typus Bleeker, 1860, whereas Pterygosoma dracoensis Jack, 1962 was found on the patagia of a Timor Flying Dragon, Draco timoriensis Kuhl, 1820. The association of G. bataviensis with H. frenatus was well documented previously, but this is the first properly documented record of this mite for Timor-Leste. Our report of G. bataviensis on H. typus is the first association of this mite with this gecko. This is the second report of P. dracoensis on D. timoriensis and the first for Timor-Leste.

Brazilian historiography on the participation of the USSR in the Second World War

2021 ◽  
pp. 97
Author(s):  
Boris Martynov
Keyword(s):  
Soviet Union ◽  
Second World War ◽  
World War ◽  
Correct Treatment ◽  
The Soviet Union ◽  
The People ◽  
International Authority ◽  
The Common ◽  
The Baltic ◽  
Second World

The article deals with the evolution of views of the Brazilian authors on the role, played by the Soviet Union in the WWII and its contribution to the victory of the anti-Hitlerian coalition. It contains a historiographical review of the works, written by the Brazilian authors on the theme, beginning from 2004. One follows the process of their growing interest towards clarifying the real contribution of the Soviet part to the common victory, along with the rise of the international authority of Brazil and strengthening of the Russo – Brazilian ties. One reveals the modern attitude of Brazilian authors towards such dubious or scarcely known themes as the Molotov – Ribbentrop pact, the battles for Smolensk and Rhzev, town–bound fights in Stalingrad, liberation of the Baltic republics, the Soviet war with Japan, etc. The author comes to conclusion, that in spite of the Western efforts to infuse the people`s conscience with the elements of the “post – truth” in this respect, the correct treatment of those events acquires priority even in such a far off from Russia state, as Brazil.

Amphipod biodiversity of shallow water in the Taranto seas (north-western Ionian Sea)

2005 ◽  
Vol 85 (2) ◽  
pp. 333-338 ◽  
Author(s):  
E. Prato ◽  
F. Biandolino
Keyword(s):  
Shallow Water ◽  
Dominant Species ◽  
New Records ◽  
Maximum Depth ◽  
Ionian Sea ◽  
Number Of Species ◽  
Gammarus Aequicauda ◽  
Different Depths ◽  
North Western

This study was carried out to determine the amphipod fauna in Mar Piccolo, Mar Grande and the Gulf of Taranto. Material in this study was obtained from 96 stations at different depths (maximum depth: −50 m) using various methods depending on the substrata. A total of 65 species was determined and 25 species are new records in the seas of Taranto. Microdeutopus gryllotalpa, Ericthonius brasiliensis, Monocorophium insidiosum, Elasmopus rapax, Gammarus aequicauda, Gammarus insensibilis, Leucothoe spinicarpa, Lysianassa costae and Pseudoprotella phasma were the dominant species and have been found in all areas considered. The comparison of the data shows that the area examined presents a high difference regarding biocenotic index. The highest number of species was collected in the Gulf with 1944 individuals, belonging to 58 species and 19 families, followed by Mar Grande with 1448 individuals belonging to 36 species and 11 families; finally Mar Piccolo with 698 individuals, 12 species and 6 families, in the First Inlet and 546 individuals, 18 species and 6 families, in the Second Inlet.

scholarly journals Anchialine biodiversity in the Turks and Caicos Islands: New discoveries and current faunal composition

2020 ◽  
Vol 49 (2) ◽  
pp. 71-86
Author(s):  
Brett Gonzalez ◽  
◽  
Alejandro Martínez ◽  
Jørgen Olesen ◽  
Sarit Truskey ◽  
...  
Keyword(s):  
New Species ◽  
Shallow Water ◽  
New Records ◽  
Invertebrate Fauna ◽  
Faunal Composition ◽  
Turks And Caicos Islands ◽  
New Findings ◽  
Faunal List ◽  
A New Species ◽  
Blue Holes

Lying at the southernmost point of the Lucayan Archipelago, the Turks and Caicos Islands are amongst the better studied localities for anchialine cave biodiversity. For nearly five decades, novel invertebrate fauna, comprised primarily of crustaceans, have been collected from these tidally influenced pools – but new findings are always on the horizon. Herein we present new records of crustaceans and annelids from anchialine blue holes and horizontal caves of the Turks and Caicos. These findings include two potentially new species of meiofaunal annelids and a new species of remipede collected from a shallow water cave pool. Our 2019 expedition additionally expands known faunal distributions for several taxa across the Caicos islands, and raises the biodiversity of the region to 35 species, 13 of them considered endemic. This is the first comprehensive faunal list for the anchialine systems in the Caicos Bank.

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