Economic effectiveness of pike (Esox lucius L.) stocking based on the example of selected lakes in East European Plain with consideration of their natural conditons

Abstract The aim of the study was to assess the economic effectiveness of pike (Esox lucius L.) stocking based on the value of fish caught with commercial fishing gears and the value of stocking material introduced into 44 lakes in the Ełk Lake District in northeastern Poland. The effectiveness of stocking is presented against the background of lake environmental conditions in the context of their natural potential for pike populations to inhabit and develop in them. The data analyzed regarded the size and value of catches and stocking from 1996-2017 that was obtained from an entity authorized to exploit fisheries. Information on selected lake morphometric, morphological, and environmental parameters was also obtained from this source. The value of pike catches in the analyzed period was characterized by a high, stabile level, and the stocking level increased. The indicator of the stocking economic effectiveness was at a high average annual level in excess of 3.9 PLN of catches per 1.0 PLN for stocking, but it decreased during the period analyzed. The high stocking effectiveness in the studied lakes was determined by, inter alia, natural conditions, stocking material quality, properly performed stocking, and efficient exploitation. However, it can be concluded that it is mainly stocking that maintains pike catches at a high, relatively stable level in the lakes analyzed. Additionally, new methods of pike population management are discussed, e.g., catch and release.

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The Siberian centipede species Lithobius proximus Sseliwanoff, 1878 (Chilopoda, Lithobiomorpha): a new member of the Polish fauna

ZooKeys ◽

10.3897/zookeys.821.32250 ◽

2019 ◽

Vol 821 ◽

pp. 1-10

Author(s):

Jolanta Wytwer ◽

Karel Tajovský

Keyword(s):

National Park ◽

East European Plain ◽

High Plasticity ◽

Lake District ◽

Local Conditions ◽

Actual Distribution ◽

Boreal Species ◽

East European ◽

Environmental Requirements ◽

First Time

The centipede Lithobiusproximus Sseliwanoff, 1878 is presented for the first time as a new member of the Polish fauna. This species, originally characterized as a widespread Siberian boreal species, seems to possess high plasticity with regards to environmental requirements. Its actual distribution range covers several geographical zones where local conditions have allowed it to survive. The present research in the Wigry National Park, northeast Poland, shows that its distribution extends to the ends of the East European Plain embracing the East Suwałki Lake District, where it occurs almost exclusively in the oak-hornbeam forests: in summer it is one of the three dominant lithobiomorph centipedes inhabiting litter layers.

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A COMPARATIVE ANALYSIS OF CHANGING SEDIMENTATION CONDITIONS DURING THE LAST INTERGLACIAL-GLACIAL MACROCYCLE IN THE LOESS AREAS OF THE SOUTHERN EAST EUROPEAN PLAIN (THE AZOV SEA REGION) AND CENTRAL CHINA (LOESS PLATEAU)

Geomorphology RAS ◽

10.15356/0435-4281-2017-1-3-18 ◽

2017 ◽

pp. 3-18 ◽

Cited By ~ 2

Author(s):

A. A. VELICHKO ◽

T. YANG ◽

A. O. ALEKSEEV ◽

O. K. BORISOVA ◽

P. I. KALININ ◽

...

Keyword(s):

Comparative Analysis ◽

Loess Plateau ◽

Central China ◽

East European Plain ◽

Last Interglacial ◽

East European ◽

Azov Sea ◽

Sedimentation Conditions

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Geographical features of forest vegetation reflected at the level of the lower-rank syntaxa (evidence from the Russian part of the Upper Dnieper basin)

Vegetation of Russia ◽

10.31111/vegrus/2017.30.94 ◽

2017 ◽

pp. 94-108 ◽

Cited By ~ 4

Author(s):

Yu. A. Semenishchenkov

Keyword(s):

Forest Vegetation ◽

East European Plain ◽

Early 20Th Century ◽

Suggested Approach ◽

Central European ◽

Classification Schemes ◽

East European ◽

Lower Rank ◽

Geographical Variations ◽

European Part Of Russia

Phytogeographical features of forest vegetation at the level of lower-rank syntaxa were being discussed in literature since the early 20th century (Cajander, 1903; Sukachev, 1926; Braun-Blanquet, 1964; Kral et al., 1975; Kleopov, 1990; Bulokhov, 2003; Ellenberg, 2009), however, phytocoenologists still have no uniform interpretation and geographical maintenance of lower classification units. Forest vegetation of the European part of Russia is well studied according to Braun-Blanquet approach with association as a system of geographical subassociations. The paper offers the approaches to the reflection of geographical variations of the natural forest vegetation in the basin of the Upper Dnieper (central part of the East European Plain) at the level of lower-rank syntaxa The xeromesophytic oak woods in the basin of the Upper Dnieper belong to the East European ass. Lathyro nigri–Quercetum roboris Bulokhov et Solomeshch 2003. Floristic differentiation of this association from the similar Central European ass. Potentillo-Quercetum is given. These two associations have large blocks of geographically significant differential species that does not allow to consider them as a part of one association. The suggested approach allows to define the chorological content of units of lower syntaxonomical ranks and make regional classification schemes comparable to each other.

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Eastern Europe’s “Transitional Industry”?: Deconstructing the Early Streletskian

Journal of Paleolithic Archaeology ◽

10.1007/s41982-021-00076-7 ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

R. Dinnis ◽

A. Bessudnov ◽

N. Reynolds ◽

T. Devièse ◽

A. Dudin ◽

...

Keyword(s):

Modern Human ◽

East European Plain ◽

Upper Palaeolithic ◽

Radiocarbon Dates ◽

East European ◽

Archaeological Material ◽

Younger Age ◽

Layer V ◽

Precise Relationship ◽

Early Upper

AbstractThe Streletskian is central to understanding the onset of the Upper Palaeolithic on the East European Plain. Early Streletskian assemblages are frequently seen as marking the Neanderthal-anatomically modern human (AMH) anthropological transition, as well as the Middle-to-Upper Palaeolithic archaeological transition. The age of key Streletskian assemblages, however, remains unclear, and there are outstanding questions over how they relate to Middle and Early Upper Palaeolithic facies. The three oldest Streletskian layers—Kostenki 1 Layer V, Kostenki 6 and Kostenki 12 Layer III—were excavated by A. N. Rogachev in the mid-20th century. Here, we re-examine these layers in light of problems noted during Rogachev’s campaigns and later excavations. Layer V in the northern part of Kostenki 1 is the most likely assemblage to be unmixed. A new radiocarbon date of 35,100 ± 500 BP (OxA- X-2717-21) for this assemblage agrees with Rogachev’s stratigraphic interpretation and contradicts later claims of a younger age. More ancient radiocarbon dates for Kostenki 1 Layer V are from areas lacking diagnostic Streletskian points. The Kostenki 6 assemblage’s stratigraphic context is extremely poor, but new radiocarbon dates are consistent with Rogachev’s view that the archaeological material was deposited prior to the CI tephra (i.e. >34.3 ka BP). Multiple lines of evidence indicate that Kostenki 12 Layer III contains material of different ages. Despite some uncertainty over the precise relationship between the dated sample and diagnostic lithic material, Kostenki 1 Layer V (North) therefore currently provides the best age estimate for an early Streletskian context. This age is younger than fully Upper Palaeolithic assemblages elsewhere at Kostenki. Other “Streletskian” assemblages and Streletskian points from younger contexts at Kostenki are briefly reviewed, with possible explanations for their chronostratigraphic distribution considered. We caution that the cultural taxon Streletskian should not be applied to assemblages based simply on the presence of bifacially worked artefacts.

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