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Abstract

For the last few decades there have been reports not only of the occurrence of new invasive species of European water-courses, but also their increasing expansion. One of such species is the Amur sleeper (Perccottus glenii). The present work contains assessment of age and length distribution, condition as well as growth rate and analysis of the parasite fauna of theAmur sleeper from the waters of the Vistula River tributary in its middle course (the Habdziński Canal). During the catch performed in 2017 and 2019, the total of 177 Amur sleepers were recorded in the studied watercourse and a statistically significant sex structure disproportion was observed. Among the specimens caught in 2017 dominant were fishes with lengths of 50.1–60.1 mm whereas in 2019 the majority of the Amur sleeper specimens measured 30.1–50.0 mm.Six age groups were recorded among the caught fish with a clear prevalence of specimens aged 1+ (70.06%). The most frequently recorded parasite of P. glenii was non-quantifiable Trichodina rostrata ciliate for which the Amur sleeper from the Polish waters appeared to be a new host. Moreover, the presence of an acanthocephalan Acanthocephalus lucii, not recorded in Poland in this host before, was observed in the chyme. Also, accidental presence of larvae of the Opisthioglyphe ranae tre-madote, which is a parasite typical of amphibians, was also recorded. Despite unfavourable habitat conditions and in-creased volumes of biogenic substances in the waters of the Habdziński Canal, the Amur sleeper found convenient condi-tions to reside in this small watercourse.

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Authors and Affiliations

Przemysław Czerniejewski
ORCID: ORCID
Angelika Linowska
Adam Brysiewicz
ORCID: ORCID
Natalia Kasowska
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Abstract

The pot experiment was conducted to access the soil microorganisms biomass (physiological method – Substrate Induced Respiration) and emissions of N2O, CO2 and CH4 (photoacoustic infrared detection method), and grasses biomass (weight method). The obtained results of analysed gases were converted to CO2 equivalent. There was no effect of the microorganisms biomass on the N2O emissions. The increase in CO2 emissions was accompanied by an increase in the microorganisms biomass (r = 0.48) under the conditions of the I swath and acid soil reaction, as well as the II swath and neutral reaction ( r = 0.94). On the other hand, in the case of CH4 emission, such a relationship was noted both swaths under the conditions of neutral reaction ( r = 0.51), but a negative correlation ( r = –0.71) was noted for the acid reaction only at the II swath. The increase in the grasses biomass with the increase in the microorganisms biomass was recorded only at the II swath in neutral reaction ( r = 0.91). In a short period of time, with the neutral soil reaction with the increase in the soil microorganisms biomass, an increase in CO2 sequestration and biomass of cultivated grasses was noted. Information on the determination of the microorganisms groups responsible mainly for the transformation of carbon compounds and CO2 and CH4 emissions from the soils of grasslands would be valuable scientifically.
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Authors and Affiliations

Renata Gamrat
1
ORCID: ORCID
Małgorzata Gałczyńska
1
ORCID: ORCID
Adam Brysiewicz
2
ORCID: ORCID

  1. West Pomeranian University of Technology in Szczecin, al. Piastów 17, 70-310 Szczecin, Poland
  2. Institute of Technology and Life Sciences – National Research Institute, Falenty, Poland
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Abstract

Round goby (Neogobius melanostomus (Pallas, 1814)) is an invasive species in the Oder River. In this study, age of 147 fish was determined using scales and otoliths, and the Fraser-Lee back-calculation method was used for population structure and theoretical length growth rates with 3 mathematical models of growth: von Bertalanffy, Ford–Walford and 2nd degree polynomial. Fish condition was determined using Fulton, Le Cren and Clark equations. Average total length and weight of fish was 162.00 mm and 83.00 g, respectively. Males were more abundant than females, representing 70% of the fish caught, and achieved greater total lengths and weights. Age 2+ dominated females and 3+ males age groups. Of the three mathematical models used to estimate fish growth, the 2nd degree polynomial model had the best fit to back-calculated lengths. Males had slightly higher growth rates than females in the first two years of life but comparable in subsequent years. The diet consisted of various benthic organisms that varied with fish age. The most frequently occurring food com-ponent was Dreissena polymorpha, which accounted for approximately 70% in the diet of fish with a body length greater than 191 mm.

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Authors and Affiliations

Agnieszka Rybczyk
ORCID: ORCID
Przemysław Czerniejewski
ORCID: ORCID
Sławomir Keszka
Mariola Janowicz
Adam Brysiewicz
ORCID: ORCID
Wawrzyniec Wawrzyniak
ORCID: ORCID
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Abstract

In 1970–2010, during the period of spring circulation and summer stagnation, hydrochemical studies were conducted in Lake Ińsko (Western Pomeranian Lake Region, Poland) with determination of the lake susceptibility to degradation and trophic changes. Also, the effect of the catchment area on the water quality in this waterbody was assessed. The waters of the study lake were characterised by low static index, which is an additional indicator of low dynamics of water masses, and low susceptibility to degradation. In spite of this, significant changes in the lake quality and trophy were observed. The hydrochemical parameters defining water quality of the study lake continued to improve. In the 70’s, the water quality was at the border of class II and III, while in 2006 and 2010 it reached the level characteristic for class I waters. Moreover, in the 70’s and 80’s of the previous century, Lake Ińsko Duże was a mesotrophic lake. Then, an increase in the lake trophy was observed, resulting in signs of eutrophy. At the end of the 90’s and in the first decade of the 21st century, the study lake returned to the state of mesotrophy. No restoration works were undertaken in Lake Ińsko in the study period. The improvement in water quality, called oligotrophication, resulted most probably from the lake reaction to changes in the soil use in the catchment area, since fewer phosphorus and nitrogen compounds flow into the lake, and also from the regulation of the wastewater management in the town of Ińsko.
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Authors and Affiliations

Jacek Kubiak
1
Sylwia Machula
1
ORCID: ORCID
Przemysław Czerniejewski
1
ORCID: ORCID
Adam Brysiewicz
2
ORCID: ORCID
Wawrzyniec Wawrzyniak
1
ORCID: ORCID

  1. West Pomeranian University of Technology in Szczecin, Faculty of Food Sciences and Fisheries, Kazimierza Królewicza street 4, 71-550 Szczecin, Poland
  2. Institute of Technology and Life Sciences – National Research Institute, Falenty, Poland
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Abstract

The depletion of natural resources such as freshwater and cropland makes it necessary to find a new solution for sustainable food production. Aquaponic systems seem to be a great alternative to traditional agriculture, however, there are still many unknowns that need to be explored. It is already known how fish stocking affects water quality in aquaponic systems, but not how it affects the plants’ growth, and especially on chlorophyll fluorescence. In this study, we examined how the density of 0, 2, 4, 8, and 16 stocking fish in five aquaria affects lettuce growth. The first tank was only a hydroponic system with plants but without fish (control). In the remaining four aquaria – 2, 4, 8 and 12 specimens of common carp fry with an average weight of 20 grams (average 8.5–33.2 g) were placed in the aquaponic growing system. Physicochemical analysis of water was conducted to determine the levels of pH, electrical conductivity ( EC), N-NO 3, N-NO 2, N-NH 4, P-PO 4, O 2 and physiological parameters of plants (nitrogen balance index – NBI, chlorophyll content index – CCI, quantum yield – QY, flavonoid content – Flv) were analysed. The results showed that fish stocking density has different effects on plant physiological parameters, but in most cases, was insignificant. It seems that the greater number of fishes and higher density indirectly causes growth inhibition (lower photosynthetic efficiency) due to the increase of N-NO 3 and a decrease of O 2 in the water.
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Authors and Affiliations

Zuzanna Malwina Jaszczuk
1
ORCID: ORCID
Adam Brysiewicz
2
ORCID: ORCID
Agnieszka Kozioł
2
Alicja Auriga
3
ORCID: ORCID
Marian Brestic
4
ORCID: ORCID
Hazem M. Kalaji
2 5
ORCID: ORCID

  1. Warsaw University of Life Sciences SGGW, Faculty of Agriculture and Ecology, Warsaw, Poland
  2. Institute of Technology and Life Sciences – National Research Institute, Falenty, 3 Hrabska Ave, 05-090, Raszyn, Poland
  3. West Pomeranian University of Technology in Szczecin, Faculty of Biotechnology and Animal Husbandry, Department of Animal Anatomy and Zoology, Szczecin, Poland
  4. Slovak University in Agriculture in Nitra, Institute of Plant and Environmental Science, Faculty of Agrobiology and Food Resources, Nitra, Slovakia
  5. Warsaw University of Life Sciences SGGW, Institute of Biology, Department of Plant Physiology, Warsaw, Poland
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Abstract

Drought is regarded as one of the environmental constraints threatening agriculture worldwide. Melatonin is a pleiotropic molecule prevalent in plants capable of promoting plant endogenous resilience to many environmental challenges including drought. Banana is an important staple food consumed in developing countries especially in Africa. In this research, we studied the role of melatonin in the growth of bananas subjected to drought under the Egyptian semi-arid conditions. To achieve this objective, a field experiment on banana (Musa spp., cv. Williams) mother plants and first ratoon was conducted on a private farm for two seasons - 2019 and 2020. Three irrigation treatments, 100, 90 and 80% irrigation water requirements (IWR) were used in conjunction with four concentrations of melatonin as a foliar spray (0 μmol, 40 μmol, 60 μmol, and 80 μmol) to determine the effect of both treatments on banana plant performance under drought. The results showed that there was a substantial difference between treatments, with the foliar application of melatonin at 80 μmol concentration improving most of the yield attributes, relative water content, total chlorophyll and proline with water deficit. However, the foliar application of the molecule lowered the biochemical characteristics mostly at 80% IWR under the Egyptian semi-arid conditions. Overall, there was a concentration-dependent response with regards to IWR for the two seasons 2019 and 2020.
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Authors and Affiliations

Islam F. Hassan
1
ORCID: ORCID
Maybelle S. Gaballah
1
ORCID: ORCID
Chukwuma C. Ogbaga
2
ORCID: ORCID
Soha A. Murad
3
ORCID: ORCID
Adam Brysiewicz
4
ORCID: ORCID
Basem M.M. Bakr
5
ORCID: ORCID
Amany Mira
6
ORCID: ORCID
Shamel M. Alam-Eldein
6
ORCID: ORCID

  1. National Research Centre (NRC), Agriculture and Biology Research Institute, Water Relations and Field Irrigation Department, Postal Code, 12622, 33 El Buhouth St, Dokki, Giza, Egypt
  2. Nile University of Nigeria, Department of Microbiology and Biotechnology, Abuja, Nigeria
  3. National Research Centre (NRC), Agriculture and Biology Research Institute Plant BioChemistry Department, Dokki, Giza, Egypt
  4. Institute of Technology and Life Sciences – National Research Institute, Falenty, Poland
  5. National Research Centre (NRC), Agriculture and Biology Research Institute, Pomology Department, Dokki, Giza, Egypt
  6. Tanta University, Faculty of Agriculture, Department of Horticulture, Tanta, Egypt

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