Markin, Marat V.
Published in
Open Mathematics
Given the abstract evolution equation y′(t)=Ay(t),t≥0, $$\begin{array}{} \displaystyle y'(t)=Ay(t),\, t\ge 0, \end{array}$$ with scalar type spectral operator A in a complex Banach space, found are conditions necessary and sufficient for all weak solutions of the equation, which a priori need not be strongly differentiable, to be strongly Gevrey ul...
George, Reny Nabwey, Hossam A. Vujaković, Jelena Rajagopalan, R. Vinayagam, Selva
Published in
Open Mathematics
In this paper we introduce dislocated and dislocated quasi version of a cone b-metric space over a Banach algebra as well as weak semi α-admissible and α-identical pair of mappings and prove common fixed point theorems for a pair of α-identical and weak α-admissible mappings in the aforesaid spaces. Our results are supported with suitable examples ...
Vladić, Tomislav Järvi, Torbjörn Petersson, Erik
Published in
Oceanological and Hydrobiological Studies
The life-history trade-off between investment in somatic growth and gonadal tissue is caused by individual energy limitations and results in individuals that adopt specific tactics to achieve reproduction. Allocation in primary and secondary sexual traits in Atlantic salmon males was studied by assessing life history traits (smolt size, sea age, gr...
J. Wójcik-Fudalewska, Dagmara Normant-Saremba, Monika Kolasa, Agata M. Anastácio, Pedro
Published in
Oceanological and Hydrobiological Studies
The feeding ecology of the Chinese mitten crab Eriocheir sinensis was studied by analyzing the stomach fullness and its content with regard to sex, size and brackish water habitats occurring on the coast of the Baltic Sea (Gulf of Gdańsk and Vistula Lagoon, Poland) and the Atlantic (Tagus Estuary, Portugal). The presented results show that neither ...
R. Sapota, Mariusz Dąbrowska, Violetta
Published in
Oceanological and Hydrobiological Studies
Otoliths are bony structures inside the fish labyrinth. They are used to determine the age of fish and to identify species based on their remains. The objective of this study was to describe the shape of otoliths in adult European perch (Perca fluviatilis), Atlantic herring (Clupea harengus), European sprat (Sprattus sprattus), lesser sand eel (Amm...
Halabowski, Dariusz Krodkiewska, Mariola Sowa, Agnieszka Lewin, Iga
Published in
Oceanological and Hydrobiological Studies
The paper reports on the first record of the Asian aquatic oligochaete species Monopylephorus limosus (Hatai, 1898) in Central Europe. The species was found in the lower course of the Bolina River (S Poland), which is contaminated with saline mine waters. One immature individual was collected in the late summer of 2017. M. limosus co-occurred with ...
Elif Kiliç, Hediye Tunca, Hatice Ongun Sevindik, Tuğba Doğru, Ali
Published in
Oceanological and Hydrobiological Studies
This study explores the activity of total superoxide dismutase (SOD), ascorbate peroxidase (APX) and glutathione reductase (GR), biomass accumulation and chlorophyll a content in Scenedesmus ellipsoideus Chodat grown under conditions of varying zinc (Zn) concentrations. In addition, the activity of different SOD isozymes (MnSOD, FeSOD and CuZnSOD) ...
Mohsin A. Al-Sofyani, Abdul Satheesh, Sathianeson
Published in
Oceanological and Hydrobiological Studies
The solitary ascidian Phallusia nigra is commonly found on hard substrates along the Jeddah coastal waters of the central Red Sea. In this study, the recruitment pattern of P. nigra on artificial substrates was assessed in relation to their type, surface color and orientation. The results showed a higher recruitment rate of the ascidian species on ...
Adamski, Michal Żmudzki, Paweł Bialczyk, Jan Kaminski, Ariel Chrapusta-Srebrny, Ewelina Bober, Beata Duchnik, Kornelia
Published in
Oceanological and Hydrobiological Studies
Toxins produced by cyanobacteria (cyanotoxins) and released into water have become a serious problem worldwide due to the increasing morbidity and mortality of living organisms they have caused. The ability to synthesize the cytotoxic alkaloid cylindrospermopsin (CYN) has been demonstrated in several freshwater species of cyanobacteria. CYN is high...
Pędziński, Jarosław Witak, Małgorzata
Published in
Oceanological and Hydrobiological Studies
The objective of this study was to reconstruct the environmental changes in the Gulf of Gdańsk in the last 200 years. Four subbottom sediment cores were analyzed with respect to diatom flora and anthropogenic effects. The so-called “anthropogenic assemblage” – a result of cultural eutrophication – was observed in the surface sediments. Changes in t...
