scholarly journals Häckningsbiologiska studier av smålommar Gavia stellata på Holmöarna, Norra Sverige

Ornis Svecica ◽  
2021 ◽  
Vol 31 ◽  
pp. 1-18
Author(s):  
Christer Olsson ◽  
Jan Pettersson ◽  
Frank Johansson
Keyword(s):  
Breeding Success ◽  
Water Surface ◽  
Average Distance ◽  
The Baltic Sea ◽  
Swedish Population ◽  
Mean Size ◽  
The Mean ◽  
One Year ◽  
The Baltic ◽  
Estimate Number

The aim of this study was to estimate number of breeding pairs, breeding success, and distance to fishing areas in a population of the Red-throated Loon Gavia stellata on two of the main islands in the Holmöarna Archipelago in the northern part of the Baltic Sea, Sweden. Potential breeding waters were surveyed during seven years, 2010–2015 and 2019. Red-throated Loons appeared in 43 of the 135 lakes of sufficient size on the islands, and the population was estimated to 25–35 pairs, or about 2% of the Swedish population. The mean size of lakes with breeding pairs was 1.6 ha, and these lakes had an average of 82% water surface without vegetation (18% vegetation cover). The mean breeding success was low, 0.30 chicks per pair and year, and at least during one year, chicks were produced in only 20 (47%) of the surveyed lakes. The average distance between the nesting waters and the fishing areas for 17 studied pairs was 1.8 km. We discuss the characteristics of suitable nesting waters as well as the factors contributing to the low reproduction. 

scholarly journals Net precipitation over the Baltic Sea for one year using models and data-based methods

2003 ◽  
Vol 55 (4) ◽  
pp. 352-367 ◽  
Author(s):  
Barbara Hennemuth ◽  
Anna Rutgersson ◽  
Karl Bumke ◽  
Marco Clemens ◽  
Anders Omstedt ◽  
...  
Keyword(s):  
Baltic Sea ◽  
The Baltic Sea ◽  
One Year ◽  
The Baltic

CLOUDINESS IN THE POLISH COASTAL ZONE OF THE BALTIC SEA AND CONDITIONS FOR RECREATION

2017 ◽  
Vol 45 ◽  
pp. 51-63
Author(s):  
Czesław Koźmiński ◽  
Bożena Michalska
Keyword(s):  
Baltic Sea ◽  
Coastal Zone ◽  
Temporal Variations ◽  
The Baltic Sea ◽  
Summer Half ◽  
The Mean ◽  
Bioclimatic Conditions ◽  
The Baltic ◽  
Time Specific

Purpose. Determination of size, variability and gradient of cloudiness on the Polish coast of the Baltic sea during the summer half-year and identification of zones with variable suitability for recreation due to cloudiness. Method. The research is based on daily values of cloudiness in the warm half-year (April-September) recorded on a scale from 0 to 8 octants, obtained from six meteorological stations located on the Polish coast of the Baltic sea during the period 2000–2016. Methods of linear regression were used in the analysis of temporal variations of cumulative monthly deviations in cloudiness for consecutive years from the mean multiannual value. In terms of recreational suitability, days were categorised into four classes according to cloudiness. Three zones of varying conditions for recreation were identified. Results. The essential characteristic of cloudiness on the Polish coast of the Baltic sea is very high variability from one day to another and the resulting change in the value of solar radiation, which, consequently affects bioclimatic stimuli. Cumulative deviations of monthly cloudiness values from the mean multiannual value show a decrease in cloudiness in April, June and July, and an increase in the remaining months of the warm half-year. It is possible to distinguish three periods regarding increased frequency of clear and moderately clear weather lasting continuously for at least 3 and 5 days on the coastal zone in summer. The Polish coast of the Baltic sea is marked by three zones of varying conditions for recreation due to cloudiness in the summer – moderately favourable, favourable and very favourable. Research and conclusion limitations. Lack of access to time-specific results of cloudiness measurement. Practical implications. The results obtained in the course of this research may be used by individuals as well as the organizers of their stays, and for the purpose of characterisation of bioclimatic conditions of the coast. Originality. In view of the recent climatic changes recorded over the last 30 years, the present research demonstrates the current cloudiness level on the Polish coast of the Baltic sea. Type of research. Presentation of the results of empirical research.

A SPILL OF LIGHT FUEL OIL IN THE BALTIC SEA

1983 ◽  
Vol 1983 (1) ◽  
pp. 517-520
Author(s):  
Olof Linden ◽  
Jan Mattsson ◽  
Mats Notini
Keyword(s):  
Baltic Sea ◽  
Acute Phase ◽  
Littoral Zone ◽  
Water Exchange ◽  
Fuel Oil ◽  
The Baltic Sea ◽  
Littoral Fauna ◽  
One Year ◽  
The Baltic ◽  
The Impact

ABSTRACT The impact of a spill of about 375 tons of light fuel oil in the southern Baltic Sea has been studied for one year. The spill originated from the tanker Sefir which sank to a 50 meter depth about six nautical miles east of the island of Öland. The study showed that the oil formed droplets which were taken up by zooplankton. Up to 50 percent of the zooplankton died during the acute phase of the spill. The oil droplets were well dispersed and sedimented over large areas. In six weeks during the acute phase of the spill, about 20,500 kilograms of oil sedimented over a 10 square kilometer area around the wreck. This corresponds to about 5.5 percent of the total amount of lost oil. Bivalves showed some uptake of oil. The littoral fauna was reduced drastically over a 10 km stretch of the coast. Only 2 percent of the fauna survived. The biomass and number of species also dropped considerably. One year after the spill, a slight recovery could be observed. The severe impact in the littoral zone was caused by a combination of the high toxicity of the oil and the low water exchange in the shallow water. In addition, the low water temperature preserved the toxic properties of the oil.

Geographical Variation in Corroboree Frogs, Pseudophryne Corroboree Moore (Anura: Myobatrachidae): a Reappraisal Supports Recognition of P-Pengilleyi Wells &Wellington

1996 ◽  
Vol 44 (6) ◽  
pp. 569 ◽  
Author(s):  
WS Osborne ◽  
RA Zentelis ◽  
M Lau
Keyword(s):  
Morphological Characters ◽  
Colour Pattern ◽  
Separate Species ◽  
Advertisement Calls ◽  
Form Analysis ◽  
Southern Form ◽  
Mean Size ◽  
The Mean ◽  
One Year ◽  
Breeding Seasons

The extent of divergence in morphology and colour-pattern between allopatric populations of the corroboree frog, Pseudophyrne corroboree, was assessed over three breeding seasons by examination of eggs, tadpoles and adults throughout the distributional range of the species. Advertisement calls of individuals from each of the populations also were recorded and analysed. The mean size of adults was found to vary considerably between years; however, within any one year individuals from the Snowy Mountains (southern form) were significantly larger than individuals from the Brindabella Range and Fiery Range (northern form), with the differences apparently not simply related to environmental influences. Multivariate analysis of quantitative morphological characters and colour-pattern separated the frogs into two distinct geographic groups corresponding with the northern form and southern form. Analysis of advertisement calls indicated that there were slight differences in the structure of the calls of the two forms, with the main differences being in call duration and number of pulses. These results, combined with the previously described genetic differences, support their recognition as separate species. It is recommended that the name P. corroboree be restricted to the southern form and that the northern form be referred to as P. pengilleyi Wells & Wellington.

Mercury fractionation in sediments of the Lower Vistula River (Poland)

2007 ◽  
Vol 36 (3) ◽  
Author(s):  
Leonard Boszke ◽  
Artur Kowalski
Keyword(s):  
Baltic Sea ◽  
Catchment Area ◽  
Total Mercury ◽  
The Baltic Sea ◽  
Vistula River ◽  
Mercury Fractionation ◽  
Flow Through ◽  
The Mean ◽  
The Baltic ◽  
Mean Concentration

Mercury fractionation in sediments of the Lower Vistula River (Poland)The Vistula is the second largest river in the Baltic Sea catchment area and provides one of the main inputs to the Baltic. The river and its tributaries flow through some of the major industrialized and urbanised regions of Poland, making it one of the most highly human-impacted rivers in Europe. Although the river status is monitored routinely, little is known about mercury forms in the sediments. This study examines mercury fractionation in the sediments of the lower part of the Vistula River. The results show that the cities along this stretch of river have a relatively low impact on both the mercury forms found in the sediment and its bioavailability in the floodplain soils. The mean concentration of total mercury in the sediments was 65 ± 14 ng g

scholarly journals Surface drifters experiment in the south-eastern part of the Baltic Sea

Baltica ◽  
2014 ◽  
Vol 27 (2) ◽  
pp. 151-160
Author(s):  
Lina Davulienė ◽  
Loreta Kelpšaitė ◽  
Inga Dailidienė
Keyword(s):  
Regression Coefficient ◽  
Meteorological Conditions ◽  
The Baltic Sea ◽  
Short Term ◽  
Surface Drifter ◽  
Mean Wind Speed ◽  
Entire Experiment ◽  
The Mean ◽  
Surface Drifters ◽  
The Baltic

In November 2013, the first short-term surface drifter experiment has been carried out along the Lithuanian coast. Three drifters were deployed from R/V Vėjūnas at a location ~6 km offshore and 2.5 km north of Klaipėda. During the period of observation from 22-30 November, the drifting direction has shifted up to five times by more than 90 degrees mainly due to changes in the mean wind direction. After seven days, the drifters have reached the coast approximately 30 km south of Klaipėda. The analysis of the relationships between the mean wind speed and the mean drift speed for the three periods differentiated based on meteorological conditions yielded a regression coefficient of 0.031, with the entire experiment period characterized by a lower value of 0.014.

Abstract P44: Final Outcomes in Patients With Ruptured Aneurysms From the SMART Registry

Stroke ◽  
2021 ◽  
Vol 52 (Suppl_1) ◽  
Author(s):  
Alejandro Spiotta ◽  
Reade A De Leacy ◽  
Bradley N Bohnstedt ◽  
David Fiorella ◽  
Clemens M Schirmer ◽  
...  
Keyword(s):  
Class Iii ◽  
Serious Adverse Events ◽  
Ruptured Aneurysms ◽  
Coil System ◽  
Post Procedure ◽  
Mean Size ◽  
Retreatment Rate ◽  
The Mean ◽  
Grade 3 ◽  
One Year

Introduction: We report the durability of treatment with SMART COIL System at one-year in patients with ruptured aneurysms enrolled in the SMART registry. Materials and Methods: The SMART Registry is a prospective, multi-center registry study. Procedures must employ ≥75% of the SMART, PC400, or POD coils to meet registry criteria. Patients with ruptured aneurysms presenting prior to the procedure were included in this analysis. SMART Registry endpoints include retreatment rates at one year, procedural device-related serious adverse events (SAE), and the ability to achieve adequate occlusion at immediate post-procedure. Results: Of the 905 enrolled patients with aneurysms, 31.8% (288/905) of patients had ruptured aneurysms (74.0% female; mean age 58.0 ± 13.5 years). Ruptured aneurysms were small (<4 mm) in 16.7% (48/288), medium (≥4mm to 10mm) in 68.4% (197/288), large (>10 to 25 mm) in 14.6% (42/288), giant (>25) in 0.3% (1/288), and the mean size was 6.9 mm (SD 3.5 ). Hunt and Hess grade ≥3 was reported in 43.8% (123/281) of patients. The anterior cerebral artery had 33.7% (97/288) of all ruptured aneurysms and the internal carotid artery had 30.6% (88/288). Stent-assisted coiling and balloon-assisted coiling were performed in 7.6% (22/288) and 31.3% (90/288) of patients, respectively. Mean packing density for ruptured aneurysms was 33.4% (SD 20.9). In patients with ruptured aneurysms, retreatment rate at one year was 16.5% (33/200). Procedural device-related SAEs were observed in 3.1% subjects (9/288). Raymond Class I or II was observed in 84.6% (242/286) at immediate post-procedure and in 84.3% (161/191) at one year. The multivariate analysis showed that neck width ≥4 mm (OR 2.56, 95% CI 1.21-5.44, P=0.0144) and male gender (OR 2.17 95% CI 1.05-4.49, P=0.0376) were predictors of Raymond Class III or retreatment at one year. Conclusion: This analysis suggests that the SMART COIL System achieves adequate embolization and retreatment rates in ruptured aneurysms at one year.

scholarly journals Net precipitation over the Baltic Sea for one year using models and data-based methods

2003 ◽  
Vol 55 (4) ◽  
pp. 352-367 ◽  
Author(s):  
BARBARA HENNEMUTH ◽  
ANNA RUTGERSSON ◽  
KARL BUMKE ◽  
MARCO CLEMENS ◽  
ANDERS OMSTEDT ◽  
...  
Keyword(s):  
Baltic Sea ◽  
The Baltic Sea ◽  
One Year ◽  
The Baltic
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