196,330 research outputs found
Genetic (RAPD) Diversity between Oleria onega agarista and Oleria onega ssp. ( Ithomiinae , Nymphalidae, Lepidoptera) in North-Eastern Peru
No full textOleria onega agarista Felder and Felder and Oleria onega ssp. nov. are two Ithomiinae subspecies from north-eastern Peru, that differ for some morphological and behavioural traits. Two contact zones are known near the town of Tarapoto: Ahuashiyacu, where both subspecies cohabit but do not seem to hybridise, and Estero (near the village of Shapaja), where they apparently hybridise. Genetic differences between the two subspecies and between populations were investigated with random amplified polymorphic DNA (RAPD) markers. Both Cluster and Principal Coordinates Analyses (CCoA and PCoA) performed using these data, provided a clear but weak discrimination between the two subspecies. Genetic diversity is much higher within the populations than between them. Moreover, the geographically more distant populations are grouped together by the genetic data. Morphological traits on the wing patterns of the hybrids are intermediary between the two butterflies subspecies, while RAPDs data place them closer to O. onega agarista than to O. onega ssp. The individuals of the Ahuashiyacu population are clearly separated into two groups, those of O. onega ssp. and O. onega agarista, by both morphology and RAPDs data. Moreover, none of those individuals show RAPD similarity with the hybrids, suggesting that hybridisation has not occurred in this populatio
(Table 1) Contents of clay minerals in their sum in size fraction <0.002 mm of surface bottom sediments from the Onega Bay, White Sea
No full text(Table 1) Contents of clay minerals in their sum in size fraction <0.002 mm of surface bottom sediments from the Onega Bay, White Se
(Table 3) Contents of total and organic carbon, total nitrogen, and calcium carbonate in surface bottom sediments of the Onega Bay, White Sea
No full text(Table 3) Contents of total and organic carbon, total nitrogen, and calcium carbonate in surface bottom sediments of the Onega Bay, White Se
Development of water protection of Lake Onega
No full textLake Onega is the second largest lake in Europe after Lake Ladoga. The lake is located in the Karelian Republic, in the Leningradskaya and Vologodskaya regions of the Russian Federation. The area of the lake is 9800 km2, its max depth is 127 m and the average depth about 30 m. The main cities situated on the shore of the lake are Petrozavodsk and Kondopoga. The lake is connected to the Baltic Sea via the River Svir, Lake Ladoga and the Neva River.
Russia is not joining the European Union (EU) in the near future. However, there is tendency to adopt the central principles of many EU directives also in Russia. Water Framework Directive (WFD) is a useful directive giving the main guidelines about how to organize water management.
The aim of the project was to make an investigation of the status of Lake Onega, to assess pressures and risks into the lake and make a general plan for water protection to guarantee a good chemical and ecological status of the lake, as expressed on the WFD. One purpose of this project was to transfer Finnish knowledge and results of Finnish investigations concerning the WFD to the area of Lake Onega.
In this study, many different steady-state and dynamic catchment and water quality models were used in assessing the effects of different loading scenarios. While Lake Onega preserves a good status of water as a whole, the problems with pollution and eutrophication exist in Petrozavodsk and Kondopoga Bays where anthropogenic loading is more pronounced.
The excessive phosphorus loading with Petrozavodsk wastewaters should be reduced considerably to prevent further eutrophication of Lake Onega. The existing treatment removes about 55-60% of total phosphorus from Petrozavodsk wastewaters. Modern technology permits to increase this figure up to 95%. In Kondopoga Bay anthropogenic impact is most severe, the pollution is heaviest at the head of the bay throughout the year, where Kondopoga PPM withdraws wastewaters for nearly 80 years (40 years without treatment). To improve environmental conditions in Kondopoga Bay the effectiveness of wastewater treatment process at Kondopoga PPM has to be enhanced and phosphorus loading has to be reduced
sj-docx-1-dsp-10.1177_20503245221112575 - Supplemental material for State naloxone co-prescribing laws show mixed effects on overdose mortality rates
No full textSupplemental material, sj-docx-1-dsp-10.1177_20503245221112575 for State naloxone co-prescribing laws show mixed effects on overdose mortality rates by MaryKate Duska, Jared M. Rhoads, Elizabeth C. Saunders and Tracy Onega in Drug Science, Policy and Law</p
External gravity oscillations in Lake Onega
No full textLake Onega is located in the southern part of
Karelia, in the north-west of Russia. We report data taken by various
limnigraphs and current meters and isolate, by spectral analysis, the most
conspicuous barotropic periods of these signals. The analysis that follows is
based on the linearized shallow-water equations, that are solved for the free
oscillations and thus identify the eigenperiods and corresponding mode
structures for this lake. Computational results are presented for a finite
difference representation for these surface-seiche equations applied to the
entire Lake Onega including its bays. The grid consists of quadratic elements of
1000 m side length corresponding to 9344 active cells. The emerging matrix
eigenvalue problem exceeds the storage and compuational capacity of standard PCs
or workstations and thus requires use of the approximate Lanczos procedure to
isolate the first ten eigenperiods and corresponding mode structures of the
barotropic seiches, lying between 12.1 and 2.2 h. Comparison of computational
results and inferences from the water level and current-meter records, disclose
satisfactory agreement between theory and observation
FIGURE 3 in A new species of Cottus from the Onega River drainage, White Sea basin (Actinopterygii: Scorpaeniformes: Cottidae)
No full textFIGURE 3. Photograph of Cottus gratzianowi sp.nov., holotype as in Fig. 2.Published as part of Sideleva, Valentina G., Naseka, Alexander M. & Zhidkov, Zakhar V., 2015, A new species of Cottus from the Onega River drainage, White Sea basin (Actinopterygii: Scorpaeniformes: Cottidae), pp. 419-430 in Zootaxa 3949 (3) on page 424, DOI: 10.11646/zootaxa.3949.3.7, http://zenodo.org/record/24367
Mineral and chemical composition of surface bottom sediments from the Onega Bay, White Sea
No full textThe distribution of temperature and salinity, current velocities, suspended particulate matter, bottom sediments, bottom morphology, and planktonic and benthic organisms during the summer period are studied in the estuary of the large Onega River and coastal areas of the Onega Bay (White Sea) influenced by interacting marine and riverine factors
3D modelling of the Onega Basin, northwestern Russia, from gravity and magnetic data and borehole information
No full textThe Palaeoproterozoic Onega Basin in northwestern Russia is an important geological archive for global events during oxygenation of Earth at 2.5–2.0 Ga. In this study, we make use of recent drilling results from the Fennoscandian Arctic Russia – Drilling Early Earth Project and the Onega Parametric Hole in combination with available gravity and magnetic data to illuminate the structure of the basin and its internal build-up. These drilling campaigns have provided new information on petrophysical properties (density, magnetic susceptibility) and stratigraphic thickness of the main horizons in the basin. We use this information in combination with gravity and magnetic data to construct a 3D crustal model of the basin with emphasis on its near-surface structure. Our near-surface structure is in agreement with previous findings and most of the gravity and magnetic anomalies are associated with known geological bodies. Modelling also suggests a lateral lithological subdivision of the upper Archaean crust into three parts. The central crust has a higher magnetic susceptibility of 0.12 (SI) and lower density of 2.7 g/cm3, while the surrounding upper crust in the western and eastern edge regions has a lower magnetic susceptibility of 0.075–0.1 (SI), but a slightly higher density of 2.75–2.8 g/cm3. One possible explanation for the differences is the presence of highly magnetised magmatic rocks in the centre of the Onega region caused by magmatic activity resulting in lava flows and comagmatic shallow intrusions during the early Palaeoproterozoic
Onega orphne Takiya & Cavichioli, 2004, sp. nov.
No full text<i>Onega orphne</i> sp. nov. <p>(Figs 1 F, 4)</p> <p> <b>Length.</b> males 12.4–12.9 mm and females 12.7–13.3 mm.</p> <p> <b>External morphology.</b> Crown (Fig. 1 F) with median length slightly more than 6/10 interocular and 4/10 transocular width; apical and lateral concave areas on crown not confluent. Frons mostly concave. Pronotum (Fig. 1 F) with posterior margin very slightly concave. Forewings (Fig. 1 F) mostly opaque; membrane extending only over first apical cell; most of corium with plexus of veins, this absent on apical and brachial cells; clavus with crossveins between claval veins and between inner claval and claval margin. Hindlegs with femoral setal formula 2:1:1; first tarsomeres with length approximately equal to combined length of distal ones. Other external characters as in generic description (Young 1977: 285).</p> <p> <b>Male genitalia.</b> Pygofer (Fig. 4 A) moderately produced; posterior margin serrate; without processes; microsetae on basiventral region; macrosetae dispersed throughout posterior 1/3. Subgenital plates (Figs 4 A, B) extending nearly to apex of pygofer; not fused basally; with uniseriate macrosetae, Styles (Fig. 4 C) extending posteriorly beyond apex of connective; apex broad and foot­shaped. Connective (Fig. 4 C) approximately Vshaped; dorsal keel strong and elongate, extending anteriorly. Aedeagus (Figs 4 D, E, F) with shaft elongate; lateral flanges on basal portion in ventral view short and acute (Fig. 4 F, males from Pichincha Province) or more elongate and round (Fig. 4 E, as in holotype and additional male from Bolívar Province); dorsal robust elongate process extending from base posteriorly beyond apex of shaft; apical spine­like process arising from left (Fig. 4 E, as in holotype) or right (Fig. 4 F) ventrolateral sclerotized margin; basal apodemes sclerotized. Paraphysis (Fig. 4 D) present as median sclerite.</p> <p> <b>Female genitalia.</b> Sternite VII with posterior margin broadly round (Fig. 4 G); disc with fine transverse striations. Pygofer (Fig. 4 I) with macrosetae distributed along posteroventral margin. Gonoplacs (Fig. 4 I) with apex narrowly round. Second valvulae (similar to Fig. 5 D) bearing 43 non­contiguous teeth; ventral prominence slightly conspicuous. Other invariant generic characters as described above.</p> <p> <b>Coloration.</b> Head and proepimeron pale orange to pale red (Fig. 1 F); crown with apices of antennal ledges and median square on posterior margin dark brown; tan areas on external sides of ocelli. Pronotum and mesonotum tan (Fig. 1 F); pair of maculae on anterolateral margin of pronotum behind eyes, anterior angles of mesoscutum, and apex of mesoscutellum, black; lateral margins of pronotum and pair of C­shaped lines on disc of pronotum continuous to black maculae on anterior margin, castaneous. Forewings (Fig. 1 F) dark brown to black; clavus with basal half with band along anal margin (continuous basally with small region of corium) and small transverse transcommissural stripe crossing apex, translucent white or tan; specimens from Pichincha Province (Ecuador) with additional translucent stripe on corium along apical portion of claval suture; claval venation over translucent area castaneous; membrane light brown. Thoracic pleura dark­brown to black, sometimes with irregular tan areas. Legs mostly dark brown to black; bases of femora tan. Abdomen dark brown to black; sternites thinly tan posteriorly.</p> <p> <b>Notes.</b> <i>Onega orphne</i> <b>sp. nov.</b> (Fig. 1 F) is very similar in general coloration to <i>O. sanguinicollis</i>, known only from a single female (Fig. 1 G). Although forewings of the former species are mostly dark brown to black, and the latter’s are mostly dark red, both species have an oblique translucent area on the basal half of the clavus, where brochosomes tend to accumulate. Additional characteristics of females, such as adult body size and shape of the posterior margin of the sternite VII (Figs 4 G, 5A), can further differentiate both species. The male genitalia of <i>O. orphne</i> resemble most closely those of <i>O. fassli</i>, sharing with the latter the presence of a paraphysis (also present in <i>O. krameri</i> <b>sp. nov.</b>) and the dorsal median process of the aedeagus. Furthermore, <i>O. orphne</i> <b>sp. nov.</b> can easily be separated from other <i>Onega</i> species by the extensively serrate posterior margin of the male pygofer and ventrolateral apical process of aedeagal shaft.</p> <p> <b>Etymology.</b> The specific epithet refers to its dark coloration, unique for <i>Onega</i> species (Gr. <i>orphne</i> = the darkness of the night). Dr. Kramer also studied the USNM male specimen from Chiriboga and labeled it “ <i>Onega tristis</i> n. sp. ”. It is very amusing to imagine that this name was due to the color pattern of the crown and pronotum, which when looked at creatively, does reveal a portrait of a sad person: ocelli as the eyes, oblique convexities on crown as eyebrows, posterior margin of crown as downcast mouth, and C­shaped lines on pronotum as the outlines of the neck (see Fig. 1 F).</p> <p> <b>Habitat.</b> Montane rainforests above 1,900 m.</p> <p> <b>Material examined.</b> Holotype: male, “ ECUADOR. Bolivar \ Guaranda (23km NE) \ elev. 7400 ft. [2,255 m] \ 20 June 1975 \ Langley and Cohen”, “Ecuador­Peace­Corps­ \ Smithsonian Institution \ Aquatic Insect Survey”, USNM. Paratypes: male and 3 females, same data as holotype, USNM; male, “ ECUADOR: \ Chiriboga, \ Pichincha Prov. \ 30 March 1958 \ R. W. Hodges \ Elev. 6500 Ft. [1,981 m]”, USNM; male, “ ECUADOR: Prov. \ Pichincha, 1900 m. \ Road Aloag­S. Domingo \ VIII­15­1969 \ P. & B. Wygodzinsky”, AMNH; 1 male and 1 female, “ ECUADOR: Pichincha \ 26km WNW Machachi \ 1900m. 12 nov 1987 ”, “J. Rawlins, C. Young \ R. Davidson. Humid \ primary forest”, CMNH.</p>Published as part of <i>Takiya, Daniela Maeda & Cavichioli, Rodney Ramiro, 2004, A review of the Neotropical sharpshooter genus Onega Distant, 1908 (Hemiptera: Cicadellidae: Cicadellini), pp. 1-19 in Zootaxa 718</i> on pages 12-15, DOI: <a href="http://zenodo.org/record/158154">10.5281/zenodo.158154</a>
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