THE ROLE OF PISCIVOROUS BIRDS OF PODICEPS GENUS IN THE ECOLOGY OF ERYSIPELOTHRIX RHUSIOPATHIAE BACTERIA / РОЛЬ РИБОЇДНИХ ПТАХІВ РОДУ PODICEPS В ЕКОЛОГІЇ БАКТЕРІЙ ERYSIPELOTHRIX RHUSIOPATHIAE
Journal Title: Рибогосподарська наука України - Year 2015, Vol 31, Issue 1
Abstract
Purpose. To analyze the role of piscivorous birds of Podiceps genus in the ecology of Erysipelothrix rhusiopathiae bacteria. Methodology. The serological examination of birds was performed using E. rhusiopathiae growth test reactions with blood on filter paper. The method of successive dilutions was used to prepare samples with 2.0 cm3 of nutrient medium containing serum concentrations of 10.0; 5.0; 2.5; 1.3; 0.6 and 0.3%. Each sample contained 0.05 cm3 of the daily culture of pathogenic bacteria E. rhusiopathiae as an antigen and was cultivated at 36.7±0.3°C. The results were recorded after 24 hours. Findings. The extensiveness of Podiceps cristatus infection was 47.1%, whereas that of Podiceps grisegena was 22.2%. Young birds were less affected by E. rhusiopathiae than adults. The infection rate was 4.9 times higher in adult P. cristatus birds (70.0%) than in the young ones. All seropositive birds P. grisegena belonged to the adult age group. There was no relationship between the birds’ sex and the extensiveness of E. rhusiopathiae infection rate. P. cristatus feeding mainly on fish had a greater risk of getting infected with pathogenic bacteria E. rhusiopathiae than P. grisegena. Originality. Serological studies of erysipelas in ichthyophagous birds of Podiceps genus have been conducted in Ukraine for the first time. Practical value. Piscivorous birds of Podiceps genus play an important role in the ecology of pathogenic bacteria E. rhusiopathiae. Erysipelothrix bacteria can not only rapidly multiply in the body of a bird, but more importantly, they can be transferred long distances between reservoirs. Thus, trophic, topical and phoric relationships are formed between P. cristatus, P. grisegena and E. rhusiopathiae. The ability of piscivorous birds to transmit pathogenic bacteria from one reservoir to others should be considered when carry
Authors and Affiliations
O. Hulai
EVALUATION OF THE EFFECTIVENESS OF THE IMPLEMENTATION OF COMPONENT STAGES OF SPERM CRYOPRESERVATION IN BROWN TROUT (SALMO TRUTTA MORPHA FARIO LINNE) / ОЦІНКА ЕФЕКТИВНОСТІ РЕАЛІЗАЦІЇ СКЛАДОВИХ ЕТАПІВ КРІОКОНСЕРВАЦІЇ СПЕРМИ СТРУМКОВОЇ ФОРЕЛІ (SALMO TRUTTA MORFA FARIO LINNE)
Purpose. To conduct the approbation of the previously developed dehydration-vitrification method on the sperm of brown trout with a rough estimate of component stages and process steps in the cryopreservation of the biol...
Effect of the diet and growing conditions on the manifestations of cannibalism in the eastern freshwater shrimp (Macrobrachium nipponense De Haan, 1849) / Вплив складу раціону і умов вирощування на прояви канібалізму у східної прісноводної креветки (Macrobrachium nipponense Dе Haan, 1849)
Purpose. To study the effect of diet and water flow composition on the manifestations of cannibalism of shrimp Macrobrachium nipponense during rearing under controlled conditions. Methodology. The material for the work...
ANALYSIS OF GENETIC DIVERSITY OF GALICIAN CARP POPULATION ON THE BASE OF FISH FARM "VELYKYY LYUBIN´” WITH USING MICROSATELLITE MARKERS / АНАЛІЗ ГЕНЕТИЧНОГО РІЗНОМАНІТТЯ ПОПУЛЯЦІЇ ГАЛИЦЬКОГО КОРОПА ГОСПОДАРСТВА «ВЕЛИКИЙ ЛЮБІНЬ» ЗА ВИКОРИСТАННЯ МІКРОСАТЕЛІТНИХ МАРКЕРІВ
Purpose. To investigate the genetic structure of the Galician carp population using microsatellite DNA markers. Methodology. Blood samples taken from the caudal vein of the specimens of the Galician carp farm "Velykyy L...
Winter hardiness of galician carp fingerlings in pond conditions of Subcarpathia / Зимостійкість цьоголіток галицького коропа у ставових умовах Прикарпаття
Purpose. The analysis and evaluation of wintering of galician carp fingerlings in pond conditions of Subcarpathia Methodology. Study was conducted at the farm "Corop", located in Rawa-Ruska, Lviv region. The objects of...
THE EFFECTS OF WATER TEMPERATURE REGIME FLUCTUATIONS ON THE EMBRYONIC DEVELOPMENT OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) / ВПЛИВ КОЛИВАНЬ ТЕМПЕРАТУРНОГО РЕЖИМУ ВОДОЙМИ НА ЕМБРІОНАЛЬНИЙ РОЗВИТОК БІЛОГО ТОВСТОЛОБИКА (HYPOPHTHALMICHTHYS MOLITRIX)
Purpose. To determine the effect of temperature regime fluctuations on the development of silver carp embryos, as well as the activity of enzymatic reactions in fish eggs. Methodology. The studies were conducted at the...