scholarly journals New Echinoderm-Crab Epibiotic Associations from the Coastal Barents Sea

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 917
Author(s):  
Alexander G. Dvoretsky ◽  
Vladimir G. Dvoretsky
Keyword(s):  
Barents Sea ◽  
Strongylocentrotus Droebachiensis ◽  
Negative Effects ◽  
Research Project ◽  
The Barents Sea ◽  
Green Sea Urchin ◽  
Commercial Species ◽  
Associated Species ◽  
Cucumaria Frondosa ◽  
First Time

During diving surveys for a Russian research project that monitored introduced species, red king crabs (Paralithodes camtschaticus) were collected at a coastal site of the Barents Sea to study the structure and dynamics of this species. Sampling of the organisms colonizing the crabs was part of this research project. For the first time, the presence of relatively large specimens of the common starfish Asterias rubens as epibionts of P. camtschaticus was observed in July 2010, 2018, and 2019. In 2010 and 2019, we also found three other echinoderm species (the Atlantic sea cucumber Cucumaria frondosa, the green sea urchin Strongylocentrotus droebachiensis, and the brittle star Ophiura sarsii). These findings add to the current list of associated species on king crabs not only in the Barents Sea but also in native areas of this host. Red king crabs have been documented as predators for these echinoderm species, and our records show additional possible interactions between king crabs and echinoderms in this region. More likely, the epibiotic lifestyle allows these echinoderms to avoid predation from red king crabs. There are no potential disadvantages derived by red king crabs through their relationships with the echinoderm epibionts due to low occurrences of these associations. We suggest no negative effects for the local red king crab population and populations of other commercial species in the Barents Sea.

Aquaculture of green sea urchin in the Barents Sea: a brief review of Russian studies

2020 ◽  
Vol 12 (4) ◽  
pp. 2080-2090 ◽  
Author(s):  
Alexander G. Dvoretsky ◽  
Vladimir G. Dvoretsky
Keyword(s):  
Sea Urchin ◽  
Barents Sea ◽  
The Barents Sea ◽  
Green Sea Urchin

scholarly journals Features of the Distribution of Chlorophyll-a Concentration along the Western Coast of the Novaya Zemlya Archipelago in Spring

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3648
Author(s):  
Pavel R. Makarevich ◽  
Veronika V. Vodopianova ◽  
Aleksandra S. Bulavina ◽  
Pavel S. Vashchenko ◽  
Tatiana G. Ishkulova
Keyword(s):  
Chlorophyll A ◽  
Barents Sea ◽  
Western Coast ◽  
Novaya Zemlya Archipelago ◽  
Chlorophyll A Concentration ◽  
Novaya Zemlya ◽  
The Barents Sea ◽  
High Concentrations ◽  
First Time ◽  
Arctic Surface

In spring 2016, the thermohaline characteristics of water masses and the distribution of chlorophyll-a concentration in the pelagic zone of the eastern part of the Barents Sea were studied. For the first time, in the conditions of an abnormally warm year and the absence of ice cover, a complex of hydrobiological works was carried out on a section crossing the Barents Sea from south to north along the western coast of the Novaya Zemlya archipelago. High concentrations of chlorophyll-a > 1 ˂ 6 mg/m3 at all stations of the transect indicate a stage of spring bloom in the successional cycle of microalgae. Significant differences in the content of chlorophyll-a in waters of various origins were revealed. The highest concentrations of chlorophyll-a corresponded to Arctic surface water (5.56 mg/m3). Slightly lower values were observed in the transformed Atlantic waters of the Novozemelskoe and Kolguevo–Pechorskoe currents (3.53 ± 0.97–3.71 ± 1.04 mg/m3), and the lowest was in the Barents waters (1.24 ± 0.84–1.45 ± 1.13 mg/m3).

A review of the genus Anatoma in the Eurasian Arctic seas (Gastropoda: Vetigastropoda: Anatomidae)

2020 ◽  
Vol 29 (1) ◽  
pp. 128-137
Author(s):  
I.O. Nekhaev ◽  
E.N. Krol
Keyword(s):  
New Species ◽  
North Atlantic ◽  
Barents Sea ◽  
Junior Synonym ◽  
Northwestern Part ◽  
Arctic Seas ◽  
Taxonomic Review ◽  
The Barents Sea ◽  
First Time

A taxonomic review of the genus Anatoma Woodward, 1859 in the Eurasian Arctic seas is presented. The new species A. golikovi sp. nov. is described from the northwestern part of the Barents Sea. The species differs from all other Arctic and North Atlantic Anatoma in having a flat spire. We consider Anatoma schioettei Høisæter et Geiger, 2011, syn. nov., a junior synonym of A. crispata (Fleming, 1828). Anatoma schanderi Høisæter et Geiger, 2011 is recorded for the first time from the Siberian seas.

Hermania indistincta comb. nov. (Gastropoda: Opisthobranchia: Cephalaspidea) from the Barents Sea – new species and genus for the fauna of the Russian Seas

2015 ◽  
Vol 24 (2) ◽  
pp. 148-154 ◽  
Author(s):  
E.M. Chaban ◽  
I.O. Nekhaev ◽  
P.A. Lubin
Keyword(s):  
New Species ◽  
Barents Sea ◽  
Taxonomic Significance ◽  
Marine Fauna ◽  
The Barents Sea ◽  
First Time ◽  
Shell Sculpture

Hermania indistincta (Ohnheiser et Malaquias, 2013) comb. nov. is recorded for the first time for the Barents Sea and the Russian marine fauna. Based on the morphology of the studied specimens the diagnosis of the genus Hermania Monterosato, 1884 is emended. The taxonomic significance of the spiral shell sculpture in the genus Hermania is discussed.

Age variability in the shell of Scaphander punctostriatus (Mighels et C.B. Adams, 1842) (Gastropoda: Heterobranchia: Cephalaspidea) as revealed by specimens from the Russian part of the Barents Sea

2013 ◽  
Vol 22 (2) ◽  
pp. 165-171 ◽  
Author(s):  
E.M. Chaban ◽  
I.O. Nekhaev
Keyword(s):  
Barents Sea ◽  
Shell Morphology ◽  
Russian Part ◽  
The Barents Sea ◽  
First Time ◽  
Shell Sculpture

The shell sculpture and morphology of the radula and gizzard plates of juvenile specimens of Scaphander punctostriatus from the Russian part of the Barents Sea is described for the first time and compared with those of adult specimens; the shell morphology is discussed and illustrated for the first time.

scholarly journals Fusulinid zonation of the Upper Carboniferous Kap Jungersen and Foldedal Formations, southern Amdrup Land, eastern North Greenland

2001 ◽  
Vol 48 ◽  
pp. 31-77
Author(s):  
V.I. Davydov ◽  
I. Nilsson ◽  
L. Stemmerik
Keyword(s):  
Barents Sea ◽  
Russian Platform ◽  
Ural Mountains ◽  
Upper Carboniferous ◽  
The Barents Sea ◽  
First Time ◽  
North Greenland

New fusulinid data from the Kap Jungersen and Foldedal Formations in southern Amdrup Land, eastern North Greenland allow the establishment of a detailed fusulinid-based zonation of the Upper Carboniferous succession in the Wandel Sea Basin. The fusulinid fauna is quite similar to that of the Russian Platform, the Ural Mountains, Spitsbergen, Bjørnøya, and the offshore areas of the Barents Sea, and therefore the Greenland strata are confidently correlated to the these regions. The Kap Jungersen Formation and the lower part of the Foldedal Formation are dated as late early Moscovian to latest Moscovian in age. The locally more than 450 m thick Moscovian part of the succession comprises four fusulinid zones: the Profusulinella prisca – Neostaffella subquadrata Zone and the Citrinoides paraozawai Zone of early Moscovian age, and the Fusulinella bocki – Pseduofusulinella pulchra Zone and the Protriticites ovatus Zone of late Moscovian age. Lower and middle Kasimovian deposits, characterized by two fusulinid assemblages of the Obsoletes obsoletus – Protriticites pseudomontiparus Zone and the Montiparus paramontiparus Zone, are recognised for the first time in Amdrup Land. The thin lower Gzelian succession is represented by two fusulinid assemblages that definine the Rugosofusulina flexuosa Zone and the Daixina crispa – Rauserites stuckenbergi Zone. The youngest Carboniferous strata, belonging to the Orenburgian part of the Gzelian are characterised by an assemblage of the Schellwienia ulukensis Zone.

scholarly journals New records of molluscs of the families Eulimidae and Pyramidellidae (Gastropoda) from the Barents Sea and adjacent Polar Basin

2017 ◽  
Vol 27 (2) ◽  
pp. 59-63
Author(s):  
Ivan O. Nekhaev
Keyword(s):  
Arctic Ocean ◽  
Coastal Waters ◽  
Barents Sea ◽  
New Records ◽  
The Arctic ◽  
Gastropod Species ◽  
The Barents Sea ◽  
New Findings ◽  
The Arctic Ocean ◽  
First Time

New findings of four gastropod species: Melanella laurae, Hemiaclis ventrosa (family Eulimidae), Chrysallida sublustris and Odostomia acuta (family Pyramidellidae) are described. O. acuta was previously confused by Russian authors with H. ventrosa, distribution of both species in the Barents Sea is limited to the coastal waters of Finmark and Murman. M. laurae and C. sublustris were found for the first time in the adjacent to the Barents Sea parts of the Arctic Ocean.

Marsh vegetation in the north-east of Malozemelskaya tundra

2011 ◽  
pp. 45-69 ◽  
Author(s):  
N. V. Matveyeva ◽  
O. V. Lavrinenko
Keyword(s):  
Barents Sea ◽  
European Part ◽  
Russian Arctic ◽  
Marsh Vegetation ◽  
North East ◽  
The North ◽  
The Barents Sea ◽  
First Time ◽  
Different Levels

For the first time on the north-east of Malozemelskaya tundra at the coast of the Barents Sea the following 5 associations — Puccinellietum phryganodis Hadač 1946 (with subassociations inops Thannheiser, Willers 1988 ex Hofmann 1969 and caricetosum subspatheceае Thannheiser, Willers 1988 nom. nud).; Caricetum subspathaceae Hadač 1946 with subass. Inops Molenaar 1974 and arctanthemetosum hultenii subass. nov. (with variants inops var. nov. and typicum var. nov.); Caricetum glareosae Molenaar 1974 (as a geographical vicariant Calamagrostis deschampsioides vic. nov.) (with subassociations typicum and festucetosum rubrae); Scirpeto—Hippuridetum tetraphyllae Nordh. 1954 (inops subass. nov.), and the Dupontia psilosantha com. type that belong to the three alliance of the Glauco-Puccinellietalia order of the Juncetea maritime class are described with the Braun-Blanquet approach. A provisional ass. Parnassio palustris—Salicetum reptantis ass. nov. prov. represented the transitional vegetation between marshes and tundras belongs to the Scheuchzerio—Caricetea fuscae class. This shows that syntaxa of different levels known previously for various territories outside of the Russian Arctic are rather common at least in its European part. The comparison of the classification units of both Braun-Blanquet and Russian dominant systems (used by A. I. Leskov in the same region in the first half of the last century) has demonstrated a large correspondence in between and the absence of the insuperable barrier between two approaches.

scholarly journals Epifauna associated with an introduced crab in the Barents Sea: a 5-year study

2009 ◽  
Vol 67 (2) ◽  
pp. 204-214 ◽  
Author(s):  
Alexander G. Dvoretsky ◽  
Vladimir G. Dvoretsky
Keyword(s):  
Native Species ◽  
Barents Sea ◽  
Common Species ◽  
Red King Crab ◽  
Paralithodes Camtschaticus ◽  
Male And Female ◽  
King Crab ◽  
The Barents Sea ◽  
The Common ◽  
Associated Species

Abstract Dvoretsky, A. G., and Dvoretsky, V. G. 2010. Epifauna associated with an introduced crab in the Barents Sea: a 5-year study. – ICES Journal of Marine Science, 67: 204–214. Species composition, prevalence, intensity, and spatial distribution of macro-invertebrates colonizing the invasive red king crab (Paralithodes camtschaticus) in a typical bay of the Barents Sea, Dalnezelenetskaya Bay (depths 5–40 m), and adjacent deeper water (120–180 m) were examined in the summers of 2004–2008. In all, 43 associated species were found on the crabs. The most common epibionts were Mytilus edulis (Bivalvia), Obelia spp. (Hydrozoa), and Circeis armoricana (Polychaeta). Symbiotic species included Ischyrocerus commensalis and Ischyrocerus anguipes (Amphipoda), Harmothoe imbricata (Polychaeta), and Johanssonia arctica (Hirudinea). There were no significant differences in the prevalence of infestation between male and female crabs. The prevalence of most of the common species was greater in crabs with old shells than in crabs with new shells. Infestation levels of J. arctica were higher in deeper than in shallow water, and M. edulis was less abundant in deep water. All species found on the crabs appear to be native to the Barents Sea. However, I. commensalis amphipods were not found at the site examined before the introduction of the red king crab, indicating that their distribution may have changed after association with this host species. Introduced hosts may well influence the distribution of rare native species.

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