Biological characteristics of silver bream (Blicca bjoerkna) in commercial fishery in the Kyiv reservoir / Біологічна характеристика проскирки (Blicca bjoerkna), як об’єкту промислового рибальства у Київському водосховищі
Journal Title: Рибогосподарська наука України - Year 2016, Vol 38, Issue 4
Abstract
Purpose. The determination and analysis of main biological characteristics of silver bream from the point of view of the formation and exploitation of its commercial stock in the Kyiv reservoir. Methodology. The work is based the results of monitoring field studies carried out on the Kyiv reservoir during 2012–2014. Ichthyological materials were collected from standard commercial gill nets with mesh sizes of 30–80 mm, which were set in different habitats and depths of the reservoir. Collection and processing of samples was carried out using conventional ichthyological methods adapted for the Dnieper reservoirs. Findings. According to the data of monitoring gill nets, silver bream population in 2014 was composed of 10 age groups. The majority of their population (70.8%) in catches was composed of age-5 to age-7 fish, i.e. the number of modal classes increased due to the right wing of the older age groups. The frequency distribution of silver bream had a shape of a curve with wide, however broken (due to the reduction in age-5 fish) peak and gradual decrease. Age-length properties, fatness parameters and condition factor of silver bream in the Kiev reservoir during last years remained on the stable high level indicating on favorable fattening conditions and forming the ichthyomass of this species. At the present time, silver bream of the Kyiv reservoir formed a commercial stock with such qualitative and quantitative characteristics, which allow exploiting it in the mode of traditional commercial harvest and specialized harvest of silver bream concentrations with the use of gill nets with mesh sizes of 50, 60 mm. Originality. We obtained and analyzed the new data on the current state of silver bream (Blіcca bjoerkna) in Kyiv reservoir as an important element of commercial fish production. Practical Value. The results of the work allows increasing qualitative and quantitative characteristics of silver bream catches and will be used for the preparation of commercial fishery regime for the Kyiv reservoir.
Authors and Affiliations
I. Zakharchenko, V. Lytvynenko, S. Kurganskiy
THE EFFICIENCY OF USING MILK THISTLE (SILYBUM MARIANUM) FOR ADJUSTING THE INTENSITY OF OXIDATIVE PROCESSES IN CARP IN THE CONDITIONS OF LEAD CONTAMINATION / ЕФЕКТИВНІСТЬ ЗАСТОСУВАННЯ РОЗТОРОПШІ ПЛЯМИСТОЇ (SILIYBUM MARINARUM) ДЛЯ КОРЕКТУВАННЯ ІНТЕНСИВНОСТІ ОКИСНИХ ПРОЦЕСІВ У КОРОПА ЗА УМОВ НАВАНТАЖЕННЯ СВИНЦЕМ
Purpose. To determine the effect of milk thistle on the intensity of oxidative processes in carp under the conditions of experimental toxic contamination with lead. Methodology. Experimental works were conducted in labo...
Combination ability of few-scaled type of carp crossbred with Nyvka scaled carp. Growing of young-of-the-year. Message 1 / Комбінаційна здатність коропів малолускатого типу при схрещуванні з нивківським лускатим. Вирощування цьоголіток. Повідомлення 1
Purpose. To obtain and evaluate crossbred young-of-the-year produced by crossing few-scale type of Ukrainian framed carp strain and Nyvka scaled type of Ukrainian scaly carp strain. Methodology. Commonly accepted selec...
Structural-functional organization of the littoral zooplankton communities of the Kremenchutskiy reservoir / Структурно-функціональна організація угруповань літорального зоопланктону верхів’я Кременчуцького водосховища
Purpose. To find out the present state of the structural and functional organization of the littoral zooplankton communities of the upper Kremenchuk reservoir in the area of the Kaniv Nature Reserve. Methodology. The...
EXPRESS-ASSESSMENT OF TOXISITY OF WATERS FROM SURFACE WATER SUPPLY SOURCES WITH THE USE OF DANIO RERIO / ЕКСПРЕС-ОЦІНКА ТОКСИЧНОСТІ ВОД ПОВЕРХНЕВИХ ДЖЕРЕЛ ВОДОПОСТАЧАННЯ З ВИКОРИСТАННЯМ РИБ DANIO RERIO
Purpose. An increase in the informativeness and shortening of the timing required for biotesting of water from surface water sources in the city of Zhytomyr with the use of Danio rerio Hamilton-Buchanan instead of the tr...
Effect of stocking density on the efficiency of rearing of sterlet Acipenser rutenus (Linnaeus) and paddlefish Polyodon spathula (Walbaum) in the conditions of Southern Ukraine / Вплив щільності посадки на ефективність вирощування рибопосадкового матеріалу стерляді Acipenser ruthenus (Linnaeus) та веслоноса Polyodon spathula (Walbaum) в умовах півдня України
Purpose. To determine the effects of specific elements of biotechnologies used for rearing sterlet and paddlefish seeds for the optimization of rearing technology and their rational use in pond fish facilities of Souther...