Autor: Orlowski, A. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Poligenetyczne obniżenia podczwartorzędowe i porwaki w osadach plejstoceńskich między Wieprzą a Łupawą
Polygenetic sub-Quaternary depressions and ice rafts in Pleistocene deposits between Wieprza and Łupawa rivers
Autorzy:: Orłowski, A.
Tematy:: obniżenia i wzniesienia podczwartorzędowe
porwak
sub-Quaternary depressions
sub-Quaternary elevations
ice rafted material; Pokaż więcej
Wydawca:: Stowarzyszenie Geomorfologów Polskich
Powiązania:: https://bibliotekanauki.pl/articles/294414.pdf Link otwiera się w nowym oknie
Opis:: Na podstawie materiałów kartograficznych z zakresu geologii zlodowaceń plejstoceńskich na Pomorzu oraz w oparciu o mapę geologiczną rzeźby podczwartorzędowej wykonaną przez autora dokonano analizy porównawczej dotyczącej rozmieszczenia i genezy form. Wydzielono typy obniżeń. Opisano porwaki glacjalne, przedstawiając ich lokalizację, litologię, stratygraficzne usytuowanie i genezę. Wskazano na potrzebę zweryfikowania stratygrafii plejstocenu na wybranych arkuszach geologicznych 1:50 000.
Sub-Quaternary buried relief between Wieprza and Łupawa rivers in northern Poland has been subject to geological research, by means of analysis of geological maps indicating sub-Quaternary morphology. For comparative analysis, maps prepared within the Detailed Geological Map of Poland 1:50,000 project and maps executed by the present author in identical scale have been used. The course of sub-Quaternary depressions on either maps shows discrepancies. Five genetic types have been distinguished, although their polygenesis is inferred. The oldest sub-Quaternary valleys are of late Cretaceous age and their origin had been influenced by Alpine tectonics. In the Tertiary, a valley system with north-and north-west-oriented drainage developed, with the base-level along the axis of the present-day Baltic Sea. During Pleistocene glaciations the older relief was covered by glacial and glacifluvial deposits. The sub-Quaternary depressions are important water suppliers for local people. In addition, an attention has been paid to the age and source of ice rafted material, as well as to the timing of their deposition, as these are important constraints in the Pleistocene stratigraphy. Ice rafted material from Możdżanów and Krzywań has special economic importance, bearing amber and phosphates, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sources of the variability of acoustic response of clupeoids in the Baltic
Autorzy:: Orlowski, A.
Tematy:: Baltic
variability of acoustic response
acoustic information; Pokaż więcej
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/331596.pdf Link otwiera się w nowym oknie
Opis:: Acoustic information, collected in the form of calibrated measurements of integrated echo energies, has been applied at the Sea Fisheries Institute since 1981 to examine the relationships between clupeoids distribution in the Baltic and the relevant environmental factors. Data were collected during different seasons for each elementary distance unit (EDSU) at standardised depth intervals and compared to the values of selected environmental parameters measured in parallel. Acoustic, biological and hydrological data were correlated temporally and spatially, then transferred to a comprehensive database, thereby enabling the 4D analysis of the factors characterising a wide range of fish behaviour. Selected characteristics describe the variability of environmental factors during the short- and long-term life cycles of clupeoids. Apart from the analysis of abiotic factors, specially prepared cross-sections of the herring in different stages of gonad maturity are presented. The aspects of variability have been described for their inclusion in the measuring and modelling herring and sprat target strength, particularly under the specific circumstances of the Baltic Sea.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Dynamic characteristics of Sv, representing diel variability of fish within full depth range
Autorzy:: Orłowski, A.
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/331842.pdf Link otwiera się w nowym oknie
Opis:: Acoustic methods could play an important role in monitoring vertical and horizontal fish distribution; including fish stock assessment, however the fish as acoustic target is not precisely specified still. The paper describes a new type of approach to express diel variability of acoustic parameter Sv, characterizing fish volume density. Multi-depth-channel integration of fish echoes was applied to estimate the average dil models of Sv dependence on time of a day. The final characteristics was calculated by computer as a vectoral field, showing quasi-continuous diel transformation of depth distribution of Sv values. Example based on data collected during October 1996 RV "Baltica" research cruise was given and discussed. Strong variability of Sv values with time and depth was exposed and clearly different diel phases of fish behaviour were separated. Results indicate a necessity of further research on fish target strength within separate periods of a diel cycle, to define more accurately biomass conversion factors. The method shown could enreach significantly systematic physiotogical studies on fish behaviour also.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Acoustic classification of southern Baltic benthic habitat
Autorzy:: Orlowski, A.
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/332425.pdf Link otwiera się w nowym oknie
Opis:: Seabed characteristics applied for classification was based on analysis of echo recordings collected aboard RV “Baltica” during regular surveys in 1995-2003 period. Hypothetical effective angle of a bottom echo č’/2, corresponding to its normalized length was applied to characterize complex seabed acoustic reflecting and scattering properties. The č’/2 values were determined for each EDSU. Classification of southern Baltic area was provided by comparison of two acoustically measured factors: statistical distribution of č’/2 and correlated depth structure within selected standard areas. Both factors are very closely related to biological characteristics of the benthic habitat. Joining them gives a wide possibility of differentiating the habitat by its basic ecological properties. The classification applied gave a unique identification and comparison of dynamics of seabed structures, useful for benthic surveys and helpful in ecologically friendly administration of the zone.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Acoustic tracking dynamic phenomena in marine ecosystem
Autorzy:: Orlowski, A.
Tematy:: acoustic tracking
marine ecosystem
hydroacoustics; Pokaż więcej
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/332782.pdf Link otwiera się w nowym oknie
Opis:: Acoustic information, collected in the form of measurements of integrated echo energiesrelated to time and 3D space has been applied at the Sea Fisheries Institute since 1981 to examine the rough statistical relationships between clupeoids distribution in the Baltic and the relevant environmental factors. In this paper it is shown that the data collected can be also applied for very detail observation of dynamic phenomena in marine ecosystem. Two differentiated case studies were selected to show new acoustic applications in specific areas of oceanographic research. In the first case spatial characteristics of fish diel vertical migration in the southern Baltic was surveyed and analysed for the period 1994-2007, against the environmental background. In the second case acoustic sounding was applied to quantify ebullition of methane from Baltic sediments. Both phenomena are strongly dependent on climatic variability. For both cases the final characteristics of the phenomenon was given in the form of video frames, expressing the processes in time. Unique method of echo-recording transformation into video frames was described and applied to analyse the process of ebullition of methane from the seabed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Acoustic seabed classification applied to Baltic benthic habitat studies: a new approach
Autorzy:: Orlowski, A.
Tematy:: ecology
bottom habitat
acoustic method
acoustic seabed classification
Baltic Sea
bathymetry
acoustic classification; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/48659.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Acoustic information applied to 4D environmental studies in the Baltic
Autorzy:: Orlowski, A.
Tematy:: biomass density
fishery science
abiotic factor
environmental factor
environment
Baltic Sea
biotic factor
marine ecosystem
fish distribution; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/47526.pdf Link otwiera się w nowym oknie
Opis:: Since 1981, acoustic information collected in the form of calibrated measurements of integrated echo energy has been applied at the Sea Fisheries Institute to observe the relationships between fish distribution and environmental factors. Data gathered in different seasons for each elementary distance unit (EDSU) at standardised depth intervals were compared to the values of selected environmental parameters measured in parallel. Acoustic, biological and hydrological data were correlated in space and transferred to the complex database, enabling 4D analysis of numerous factors characterising a wide range of fish behaviour. A number of methods and standards of comparisons are described to explain how to improve understanding of the relationship between 3D spatial environmental gradients and fish distributions. The results of various case studies, including the influence of hydrologic and seabed characterising factors, illustrate the practical application and validity of the methods. Particular attention is given to indicators of the dependence of local fish biomass density on the temperature structure in the sea.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 8.

Tytuł:: Acoustic studies on environmental pressure on 3D fish distribution in the Baltic
Autorzy:: Orlowski, A.
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/331632.pdf Link otwiera się w nowym oknie
Opis:: This paper describes results of enhanced version, of the macrosounding method to integrate acoustic data with environmental and biological parameters in a time and space scale, for use in marine ecosystem analyses. Fish distributions are shown by a vari-coloured topographical space, or time based, matrix of volume back-scattering strength (sv). The matrix is calculated for one or the series of surveys for each distance unit (ESDU) in standardized slices of insonified volume. Each sv visualization is accompanied by a parallel cross-section of the same space unit, which provides a distribution of the selected environmental parameter measured during the same survey. Charts of such parameters are produced with the same procedures as for sv. This presentation of multi-disciplinary data greatly improves recognition of time and space gradients. Analyses of data from multi-dimensional matrix calculated for individual transect improve interpretation and modeling of ecosystem characteristics. Application of the method was illustrated by examples, showing its practical use for data from 1994-2001 in the southern Baltic, collected during the autumn ICES acoustic surveys.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 9.

Tytuł:: Acoustic evaluating the Baltic fish behaviour
Autorzy:: Orłowski, A.
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/331676.pdf Link otwiera się w nowym oknie
Opis:: Acoustic methods could play an important role in studies of fish group behaviour in relation to environmental factors, being one of the most promising tools of research of ecosystems. The paper presents new conceptions of treatment acoustic, biological and hydrological data collected during surveys of pelagic fish resources. A method of macrosounding was enriched by complex imaging of environmental factors for single transects. More developed version, called "matrix macrosounding", deslinied for description of selected cross-sections, characteristic for the Baltic ecosystem, was introduced and examples of its application for short-term or long-term ecological studies were given. Basic diel fish environmental preferences were estimated owing to correlating acoustic and hydrological data collected over the period 1981-1996 in the southern Baltic. In a consequence, preliminary models of day life-eycle of fish in relation to main environmental factors were formulated and applied for fish behavioural studies. Examples of fish behaviour models, determined for the autumn are shown.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Acoustic reconnaissance of fish and evironmental background in demersal zone in Southern Baltic
Autorzy:: Orlowski, A.
Wydawca:: Polskie Towarzystwo Akustyczne
Powiązania:: https://bibliotekanauki.pl/articles/332133.pdf Link otwiera się w nowym oknie
Opis:: The paper describes results of studies based on four-dimensional measurements of the Sv distribution in 3m layer over the bottom in the southern Baltic area for the period 1995-2002. These are correlated with values of coincident environmental factors: time, depth, water temperature, salinity and oxygen levels, bottom features, estimated on the basis of survey data and wide range of methods, elaborated by the author for fish behaviour studies. The purpose of the paper is to compare results collected during acoustic surveys in the Baltic and to estimate irregularities in fish distribution potentially influencing the results of fish bottom trawling in a sense of its application for demersal fish resources assessment.
Dostawca treści:: Biblioteka Nauki

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