Fluctuating Asymmetry of the Traits of the Seismosensory System of the Roach Rutilus rutilus (L.) (Cyprinidae, Pisces) and the European Perch Perca fluviatilis L. (Percidae, Pisces) in Small Ponds with Various Water Mineralization

2020 ◽  
Vol 47 (10) ◽  
pp. 1372-1377
Author(s):  
B. G. Kotegov
Keyword(s):  
Fluctuating Asymmetry ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
European Perch ◽  
Roach Rutilus Rutilus ◽  
Seismosensory System ◽  
Water Mineralization ◽  
Perch Perca Fluviatilis

scholarly journals Catch-and-Release Ice Fishing with a Mormyshka for Roach (Rutilus rutilus) and European Perch (Perca fluviatilis)

2019 ◽  
Vol 77 (4) ◽  
pp. 235-242
Author(s):  
Tomasz K. Czarkowski ◽  
Andrzej Kapusta
Keyword(s):  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
European Perch ◽  
Roach Rutilus Rutilus ◽  
Catch And Release ◽  
Perch Perca Fluviatilis ◽  
Basic Parameters ◽  
Upper Jaw ◽  
Time Required

Abstract This study examined and described the basic parameters of the catch-and-release angling of roach Rutilus rutilus and European perch Perca fluviatilis with the mormyshka technique. Catch efficiency, the size of the fish caught, the time required to unhook the fish and the total time during which the fish were handled, hooking location, the occurrence of injury and initial hooking mortality were determined. The study indicates that the mormyshka technique is an effective way to catch roach and European perch when ice fishing. The efficiency of the catches and landings was similar for barbed and barbless hooks. The mormyshka technique also proved to be safe for the fish during catch-and-release fishing. The decided majority of fish were hooked shallowly on the upper jaw, which is a safe location, and injury occurred rarely regardless of the hook type. Generally unhooking the fish from the mormyshka hook was seamless and fish handling was brief. Additionally, when roach were caught with barbless hooks, unhooking time and handling was shorter than it was with barbed hooks. No initial hooking mortality was observed in roach, while it occurred in only two specimens of European perch.

Monitoring of the ecological state of the city lake of Chita

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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