Predicted climate change effects on European perch (Perca fluviatilis L.) - A case study from the Curonian Lagoon, south-eastern Baltic

Time and spatial variations in macroparasite status were investigated in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus in Lake Norsjø (Southern Norway), based on gillnet fishing in three locations in the spring, summer, and fall 2018. In addition, length, weigth, age, sex, δ13C, and δ15N were determined. Parasite abundance was modelled using negative binomial generalized linear models in relation to fish metrics, season, and sampling location. The most prevalent parasite species were determined by the diet and habitat of the host. European perch was mainly infected by acanthocephalans, European whitefish mainly infected by acanthocephalans and cestodes, and Arctic charr mainly infected by cestodes. The most prevalent parasites in European perch are transmitted by benthic animals. Parasites in European whitefish are transmitted by both benthic animals and copepods, while the most prevalent parasites in Arctic charr are copepod transmitted. This corresponds well with the δ13C signatures in the three species, indicating that European perch primarily fed in the littoral zone (δ13C: -24.9 ± 2.5 ‰), Arctic charr in the pelagic and profundal zone (δ13C: -29.4 ± 1.1 ‰), while European whitefish both fed in the littoral and pelagic zone (δ13C: -28.3 ± 2.3 ‰) of Lake Norsjø. Individual abundances of parasites depended on host age, length, sex, δ15N, and season. Positive correlations between parasite abundance and host age, length, or trophic level measured as δ15N were most common, and occurred in all three host species. Many parasites accumulate with age, and larger hosts provide more diverse habitats for parasites.

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Monitoring of the ecological state of the city lake of Chita

Safety of technogenic and natural systems ◽

10.23947/2541-9129-2021-4-52-57 ◽

2021 ◽

pp. 52-57

Author(s):

Vladimir V. Zvyagintsev ◽

Olga Yu. Zvyagintseva ◽

Vadim K. Chernyshov

Keyword(s):

Heavy Metals ◽

Fluctuating Asymmetry ◽

Aquatic Ecosystem ◽

Perca Fluviatilis ◽

Gibel Carp ◽

European Perch ◽

Lake Kenon ◽

Perch Perca Fluviatilis ◽

The City

Introduction. The paper presents the results of the studies on assessing the quality of the aquatic ecosystem of a lake located within the city. The European perch (Perca fluviatilis L.) and the Gibel carp (Carassius gibelio) were used as an indicator for determining the quality of the aquatic ecosystem by the method of fluctuating asymmetry. Problem Statement. The aim of the work was to conduct monitoring with the subsequent assessment of the quality of the ecosystem of the city lake using the method of fluctuating asymmetry (hereinafter FA). Theoretical and Practical Part. The quality of the urban lake aquatic ecosystem was assessed using the FA method (indicators: the European perch (Perca fluviatilis L.), 1758 and the Gibel carp (Carassius auratus Bloch), 1783). To identify the reasons for the high PFA values, a chemical analysis (in an accredited laboratory) of the gills of the Gibel carp for heavy metals was performed. Conclusions. As a result of the research, the FA indicators values for these indicators were obtained. According to the results of a laboratory study of the content of heavy metals in the gill arches of the Gibel carp, an excess of the maximum permissible concentration of 8 out of 10 analyzed elements was revealed. It has been established that the ecosystem of the city lake Kenon is experiencing a significant anthropogenic load (5 points — the critical quality of the aquatic environment) and it continues to increase towards the deterioration of the habitat.

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Climate change effects on pasture-based dairy systems in south-eastern Australia

Crop and Pasture Science ◽

10.1071/cp20108 ◽

2020 ◽

Author(s):

K. G. Pembleton ◽

B. R. Cullen ◽

R. P. Rawnsley ◽

T. Ramilan

Keyword(s):

Climate Change ◽

Climate Change Effects ◽

South Eastern ◽

Eastern Australia ◽

Dairy Systems ◽

South Eastern Australia

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Endohelminths of European Perch (Perca fluviatilis) from Selected Localities in Poland with an Emphasis on Search of the Broad Fish Tapeworm Dibothriocephalus latus

Acta Parasitologica ◽

10.2478/s11686-019-00087-z ◽

2019 ◽

Vol 64 (3) ◽

pp. 544-550

Author(s):

Alžbeta Radačovská ◽

Eva Bazsalovicsová ◽

Angelika Linowska ◽

Marta Kołodziej-Sobocińska ◽

Ivica Králová-Hromadová

Keyword(s):

Perca Fluviatilis ◽

European Perch ◽

Perch Perca Fluviatilis

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Remote Sensing of Coastal Upwelling in the South-Eastern Baltic Sea: Statistical Properties and Implications for the Coastal Environment

Remote Sensing ◽

10.3390/rs10111752 ◽

2018 ◽

Vol 10 (11) ◽

pp. 1752 ◽

Cited By ~ 11

Author(s):

Toma Dabuleviciene ◽

Igor E. Kozlov ◽

Diana Vaiciute ◽

Inga Dailidiene

Keyword(s):

Baltic Sea ◽

Satellite Data ◽

Coastal Upwelling ◽

Optical Data ◽

Curonian Lagoon ◽

The South ◽

Near Surface ◽

South Eastern ◽

The Baltic ◽

Eastern Baltic

A detailed study of wind-induced coastal upwelling (CU) in the south-eastern Baltic Sea is presented based on an analysis of multi-mission satellite data. Analysis of moderate resolution imaging spectroradiometer (MODIS) sea surface temperature (SST) maps acquired between April and September of 2000–2015 allowed for the identification of 69 CU events. The Ekman-based upwelling index (UI) was applied to evaluate the effectiveness of the satellite measurements for upwelling detection. It was found that satellite data enable the identification of 87% of UI-based upwelling events during May–August, hence, serving as an effective tool for CU detection in the Baltic Sea under relatively cloud-free summer conditions. It was also shown that upwelling-induced SST drops, and its spatial properties are larger than previously registered. During extreme upwelling events, an SST drop might reach 14 °C, covering a total area of nearly 16,000 km2. The evolution of an upwelling front during such intensive events is accompanied by the generation of transverse filaments extending up to 70 km offshore. An analysis of the satellite optical data shows a clear decline in the chlorophyll-a concentration in the coastal zone and in the shallow Curonian Lagoon, where it drops down by an order of magnitude. It was also shown that a cold upwelling front alters the stratification in the atmospheric boundary layer, leading to a sudden drop of air temperature and near-surface winds.

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Seasonality and multiannual variability of floods: case study from Eastern Poland

ITM Web of Conferences ◽

10.1051/itmconf/20182300031 ◽

2018 ◽

Vol 23 ◽

pp. 00031

Author(s):

Grzegorz Siwek

Keyword(s):

Climate Change ◽

Flow Duration Curve ◽

Distribution Analysis ◽

Climate Change Effects ◽

Flow Duration ◽

Flood Season ◽

Seasonality Index ◽

Annual Distribution ◽

Flood Characteristics

Nowadays, under increasing climate change effects on the environment, we can observe increasing number of extreme phenomena, including meteorological and hydrological ones. One of such phenomena are floods. The objective of this article is the assessment of basic flood characteristics seasonality in the annual distribution. Analysis were performed based on time series of daily flow values recorded in the years 1951–2014 in three gauging stations located on rivers in Easter Poland, in upper Wieprz catchment. Floods were defined according to TLM algorithm and were assumed to be all cases of flow occurrence exceeding 10% read from FDC (flow duration curve) (Q10). Seasonality was analysed using Markham’s Seasonality Index and Period of Seasonal Concentration, analysis of autocorrelation function (ACF) as well as proposed by the author Seasonal Winter Floods Index. The distribution of floods during year indicates one flood season in year which occurs in the spring.

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