scholarly journals Gill Histopathology as a Biomarker for Discriminating Seasonal Variations in Water Quality

2021 ◽  
Vol 11 (20) ◽  
pp. 9504
Author(s):  
Zoran Marinović ◽  
Branko Miljanović ◽  
Béla Urbányi ◽  
Jelena Lujić
Keyword(s):  
Water Quality ◽  
Seasonal Variations ◽  
Aquatic Ecosystem ◽  
Mucous Cell ◽  
Fish Gills ◽  
Histopathological Alterations ◽  
Bream Abramis Brama ◽  
Gill Structure ◽  
Cell Alterations ◽  
Common Bream Abramis Brama

Histopathological alterations in various fish organs have a pronounced value in aquatic toxicology and are widely used in environmental monitoring. The aim of this study was to evaluate whether histopathological alterations in fish gills can discriminate seasonal variations in environmental conditions within the same aquatic ecosystem, and if so, which alterations contributed the most to seasonal differentiation. Microscopic examination of common bream Abramis brama gills displayed various alterations in gill structure, including epithelial hypertrophy, hyperplasia, mucous and chloride cell alterations, epithelial lifting, necrosis, hyperemia and aneurism. These alterations were subsequently quantified by a semi-quantitative analysis in order to detect differences in the intensity of the mentioned alterations. Epithelial hypertrophy, hyperplasia, epithelial lifting and necrosis varied significantly between seasons with only necrosis being significantly higher in the first season. Discriminant canonical analysis displayed that epithelial hyperplasia, mucous cell alterations, epithelial lifting and necrosis contributed the most to discrimination between seasons. Overall, this study demonstrates that histopathological biomarkers in fish gills can be used in discriminating seasonal variations in water quality within the same aquatic ecosystem.

scholarly journals Hybridization behaviour between two common European cyprinid fish species – silver bream, Blicca bjoerkna and common bream, Abramis brama – in a controlled environment

2009 ◽  
Vol 59 (1) ◽  
pp. 97-108 ◽  
Author(s):  
Michaël Ovidio ◽  
Jean-Claude Philippart ◽  
Billy Nzau Matondo ◽  
Pascal Poncin
Keyword(s):  
Fish Species ◽  
Mating Success ◽  
Cyprinid Fish ◽  
Controlled Environment ◽  
Abramis Brama ◽  
Bream Abramis Brama ◽  
Common Bream ◽  
Common Bream Abramis Brama

AbstractThe egg release–mating comparison, heterospecific matings and mating success under two hybridization conditions – (i) mixing one sex per species and (ii) mixing both sexes from each species – were investigated to determine whether silver bream Blicca bjoerkna and common bream Abramis brama can hybridize in nature.The results revealed that non-matings in hybridization experiments of silver bream females × common bream males can be explained by territorial and aggressiveness activities observed in common bream. In common bream females × silver bream males, heterospecific matings were observed but their numbers were significantly lower than the spawning numbers, and in this experiment, a female mated with one to four heterospecific males. In mixing both sexes from both species, similar spawning – mating numbers were observed but heterospecific matings accounted for only 27% of the total matings, with 24% accounting for heterospecific matings between common bream females and silver bream males, directly or by opportunism. Mating success was characterized by the occurrence of fertilized eggs after matings.Natural hybridization occurred preferentially between common bream females and silver bream males.

scholarly journals Modeling water quality in the Anthropocene: directions for the next-generation aquatic ecosystem models

2019 ◽  
Vol 36 ◽  
pp. 85-95 ◽  
Author(s):  
Wolf M Mooij ◽  
Dianneke van Wijk ◽  
Arthur HW Beusen ◽  
Robert J Brederveld ◽  
Manqi Chang ◽  
...  
Keyword(s):  
Water Quality ◽  
Aquatic Ecosystem ◽  
Next Generation ◽  
Ecosystem Models

USE OF DISSOLVED ORGANIC MATTER BY MICROORGANISMS: FORMATION OF WATER QUALITY IN A POND OF A HIGH TROPHIC LEVEL

Fisheries ◽  
2020 ◽  
Vol 2020 (5) ◽  
pp. 25-29
Author(s):  
Anatoliy Sadchikov ◽  
Sergey Ostroumov
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Organic Carbon ◽  
Dissolved Organic Matter ◽  
Trophic Level ◽  
Aquatic Ecosystem ◽  
High Trophic Level ◽  
Bacterioplankton Community ◽  
Algae And Bacteria

The role of algae and bacteria in the consumption and mineralization of dissolved organic matter (DOM) in a highly trophic aquatic ecosystem was studied. The phytoplankton and bacterioplankton community consumed 60% of added DOM in August and 56% of DOM in September. Of the uptaken DOM, a significant amount of organic carbon was mineralized. In August 42.7% and in September 29% of organic carbon (of the consumed organic matter) were used for respiration.

Winter activity of common bream (Abramis brama L.) in a European reservoir

2018 ◽  
Vol 25 (3) ◽  
pp. 163-171
Author(s):  
P. Jurajda ◽  
K. Roche ◽  
K. Halačka ◽  
M. Mrkvová ◽  
J. Zukal
Keyword(s):  
Abramis Brama ◽  
Winter Activity ◽  
Bream Abramis Brama ◽  
Common Bream ◽  
Common Bream Abramis Brama
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