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| Registros recuperados: 10 | |
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| Korovchinsky, N.M.; Sergeeva, N.G.. |
| The recently described Pseudopenilia bathyalis Sergeeva, 2004, found in the depths of the Black Sea and initially attributed to family Sididae (Crustacea: Cladocera: Ctenopoda), have after reinvestigation been placed in Pseudopenilidae, a new family of the cladoceran order Ctenopoda. The following set of the main diagnostic features characterize Pseudopenilidae: comparatively large antennules with long sensory seta and five aesthetascs; long and massive second antennae with two-segmented branches armed with long, one-segmented, needle-shaped setae without setules; maxillules without long setae; lack of second maxillae; closed brood pouch; six pairs of similar thoracic limbs without gnathobases and filtering setae; small epipodites present only on thoracic... |
| Tipo: Journal Contribution |
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| Ano: 2008 |
URL: http://10.0.0.194:8080/dspace/handle/99011/3878 |
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| Revkov, N.K.; Sergeeva, N.G.. |
| The analysis of current state of zoobenthos at the Crimean shores of the Black Sea is fulfilled. The general features of taxonomical structure, regional peculiarities of bottom fauna development and species number distribution pattern with depth are considered. The results obtained testify the absence of species number reduction at the Crimean coastal zone of the Black Sea over the 2nd half of the 20th century. Total number of the macrozoobenthos species registered in the Crimea water area exceeds 560. Filter-feeding mollusks (Chamelea gallina and Modiolula phaseolina first of all) became the most pronounced “evolutioning” species, determining the quantitative changes of the bottom fauna over the soft-bottoms of the southwestern Crimea during the period... |
| Tipo: Conference Material |
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| Ano: 2004 |
URL: http://10.0.0.194:8080/dspace/handle/99011/3880 |
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| Gulin, M.B.; Sergeeva, N.G.. |
| Meiobenthos densities and higher taxon composition were studied in an active gas seepage area at depths from 182 to 252 m in the submarine Dnieper Canyon located in the northwestern part of the Black Sea. The meiobenthos was represented by Ciliata, Foraminifera, Nematoda, Polychaeta, Bivalvia, Gastropoda, Amphipoda, and Acarina. Also present in the sediment samples were juvenile stages of Copepoda and Cladocera which may be of planktonic origin. Nematoda and Foraminifera were the dominant groups. The abundance of the meiobenthos varied between 2397 and 52,593 ind.m-2. Maximum densities of Nematoda and Foraminifera were recorded in the upper sediment layer of a permanent H2S zone at depths from 220 to 250 m. This dense concentration of meiobenthos was found... |
| Tipo: Journal Contribution |
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| Ano: 2007 |
URL: http://10.0.0.194:8080/dspace/handle/99011/3879 |
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| Sergeeva, N.G.. |
| The study examined bottom sediments collected at 40 stations from 400 to 2250-m depths of the Black Sea. Obtained results demonstrate the diversity of organisms specific for anaerobic zone of the sea. The deep-sea bottom dwellers are subdivided according to the origin as 1) species common on the Black Sea shelf, transferred down to the depth and adapted to the toxic environment, and 2) endemics of the permanent hydrogen sulphide zone. The endemic fauna considerably differs from fauna in oxic zone. Bathyal fauna of the Black Sea consists mostly of organisms with dimensional and ecological characteristics inherent in meiobenthos. The data of the investigation point out that the concept about “azoic or lifeless permanent hydrogen sulphide zone of the Black... |
| Tipo: Book Section |
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| Ano: 2003 |
URL: http://10.0.0.194:8080/dspace/handle/99011/3881 |
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| Sergeeva, N.G.. |
| New species and new genus of the cladocera from order Ctenopoda , family Sididae are described. New representative found in the deep-sea anaerobic environment (1900 and 2140 m depths) is considered to be the endemic in hydrogen-sulphide zone of the Black Sea. Data on new species are presented in the department of shelf ecosystems of the Institute of Biology of the Southern seas, NAS of Ukraine (Sevastopol). The representatives of the new genus are characterized by short antennules with five aesthetascs, massive swimming antennae with basipodite having a number of protuberances and two-segmented branches with featherless setae, six pairs of thoracic limbs of more or less uniform structure, and wide post abdomen with large cone-shaped terminal claws and... |
| Tipo: Conference Material |
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| Ano: 2004 |
URL: http://10.0.0.194:8080/dspace/handle/99011/3882 |
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| Registros recuperados: 10 | |
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