Age and growth of vendace, Coregonus albula (L.), from Lake Wigry (northeast Poland)

Kozłowski, Krzysztof; Kozłowski, Jacek; Poczyczyński, P.; Martyniak, Andrzej

doi:10.2478/v10086-010-0027-7

Cited by 5 publications

(10 citation statements)

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“…Reintroduction is being carried out since 1930s in Lake Wigry using the juvenile individuals from the fish inhabiting that lake has contributed to the restoration of the European cisco population [45]. Due to the above, the population from Lake Wigry is probably the most widespread European cisco population in Poland [10]. Apparently, this is confirmed by the results of our study suggesting that the population from Lake Wigry might have spread in the Pomeranian lakes in the past.…”

Section: Discussionsupporting

confidence: 83%

“…This is necessary, as the natural populations are reduced due to the deteriorating quality of water and currently constitute a small fraction of the total population [10]. Extinction of the European cisco has also been observed in some lakes in Poland [3,4].…”

Section: Discussionmentioning

confidence: 99%

“…Deteriorating ecological conditions have lead to a decline in the population of the European cisco, and most of its populations in Polish lakes are maintained thanks to reintroduction [9]. The European cisco populations from natural spawning sites constitute a small fraction of the total population [10]. In north-western Poland, the European cisco is present in less than 3% lakes, and half of these lakes are monitored by professional fishermen [11].…”

Section: Introductionmentioning

confidence: 99%

“…In north-western Poland, the European cisco is present in less than 3% lakes, and half of these lakes are monitored by professional fishermen [11]. Previous studies of the European cisco population from this area have focused on age structure, growth rate, condition [10,12] and fertility [13]. Most lakes from which the investigated fish originate are located in protected areas included in the Natura 2000 network.…”

Section: Introductionmentioning

confidence: 99%

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Genetic structure of the cisco (Coregonus albula L.) from lakes of glacial origin in northern Poland

et al. 2015

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European cisco (Coregonus albula L.) is one of the most precious species of the European lake ichtyofauna, however, due to progressive eutrophication of water, the range of its occurrence has decreased. Deteriorating ecological conditions are the main cause of this decline in population, and most of the existing populations in lakes are maintained thanks to reintroduction. Thus, it is important to determine the genetic structure of the European cisco. The study involved PCR-RFLP-based genetic analysis of C. albula caught in 15 lakes in northern Poland, including four lakes located in national parks. The analysis covered 3 genes located in the mitochondrial DNA: ND1, ND3/4 and cytochrome b, as well as a control region (D-loop). The PCR product was digested with 4 endonucleases (RsaI, MspI, BsuI and HhaI) and the resulting haplotypes were grouped into combinations. Statistical analysis were then performed on these groups. Based on the genetic distance, a phenogram was constructed in which two groups could be distinguished. One group was represented by C. albula populations from most lakes in north-western Poland, including the three protected lakes. The other group consisted of the European cisco population from Lake Wigry (north-eastern Poland) and commercially exploited lakes from the southern part of the investigated north-western Poland area. The results of the study of C. albula from northern Poland present a valuable molecular characterization of the populations and can be a starting point for further genetic monitoring.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic structure of the cisco (Coregonus albula L.) from lakes of glacial origin in northern Poland

et al. 2015

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“…1). It is a deep (max depth 108 m, area 330 ha), oligo-mesotrophic lake which hosts a diversified fish population, approximately 24 fish species (Kozłowski et al 2008). The most numerous are roach, Rutilus rutilus (Linnaeus 1758), perch, Perca fluviatilis (Linnaeus 1758), vendace, Coregonus albula (Linnaeus 1758) and white fish, Coregonus lavaretus (Linnaeus 1758).…”

Section: Methodsmentioning

confidence: 99%

How pulse lengths impact fish stock estimations during hydroacoustic measurements at 70 kHz

Godlewska

Colon²,

Jóźwik

et al. 2011

Aquat. Living Resour.

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-Water Framework Directive requires reliable and effective monitoring tools, and hydroacoustics has a potential to be one of them. The effect of pulse duration on in situ acoustical estimates of fish density and their size distribution was investigated. Measurements were performed in the oligo-mesotrophic Lake Hancza (Poland) using a SIMRAD EK60 split-beam echo-sounder at 70 kHz frequency. During the survey, two similar transducers pinged alternatively through the multiplexer using 4 different pulse lengths, from short to long ones. The results show that the volume backscattering coefficient (Sv) values, equivalent of the fish biomass, were not influenced by the pulse length. However, the number of the detected fish, the mean target strength (TS), and consequently the fish density, differed significantly for the long pulse duration data. This was especially noticeable in the layer above the thermocline with dense fish populations. In this upper layer, for the long pulse the Sawada index frequently exceeded value of 0.1 leading to overestimation of the mean TS and underestimation of the fish density.

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Modelling the Leachability of Strontium and Barium from Stone Building Materials

Pękała

Musiał

2021

Materials

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In order that the impact on the environment and human beings can be assessed, it may prove necessary for geochemical research work to entail determinations of concentrations of trace elements in building materials, and it is also likely that this will be a time-consuming and financially-demanding business. Additionally, once basic research has been carried out to determine the mineral composition and structural and textural features, it will then be important to determine concentrations of elements that affect the surrounding natural environment and the health of human beings. This paper thus describes mineralogical and geochemical analyses performed on the stone material that opoka rocks represent. Mineralogical studies have shown that the studied opoka rocks most often have cryptocrystalline silica dispersed among carbonate components. The texture of the rock is slightly porous. Silica in the form of type opal A and CT (cristobalite–tridymite) is the main mineral component of the opoka rocks. Carbonate minerals represented by calcite were an important component in the opoka rocks. Earlier geochemical studies focused on the concentration of Sr and Ba. However, the determination of the leachability of these elements as a function of time is a novelty in this study. Trace elements leached from the material matrix were made subject to determinations. The MATLAB program was used to assess leachability in the cases of both strontium and barium, by reference to the Mamdani–Assilian fuzzy algorithm. The presented work has thus sought to experiment with the use of statistical methods to monitor the effectiveness of geochemical processes taking place over time.

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Age and growth of vendace, Coregonus albula (L.), from Lake Wigry (northeast Poland)

Cited by 5 publications

References 1 publication

Genetic structure of the cisco (Coregonus albula L.) from lakes of glacial origin in northern Poland

Genetic structure of the cisco (Coregonus albula L.) from lakes of glacial origin in northern Poland

How pulse lengths impact fish stock estimations during hydroacoustic measurements at 70 kHz

Modelling the Leachability of Strontium and Barium from Stone Building Materials

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