Russian Journal of Parasitology
DOI:10.12737/13271
Article history:
Received 19.01.2015
Accepted 14.03.2015
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DYNAMICS OF FOCI OF BIRD NOTOCOTYLIDOSIS IN THE ECOSYSTEM OF LAKE CHANY (WESTERN SIBERIA) IN THE LAST 80 YEARS
Serbina E. A.1, Bonina O. M 2
1Institute of Systematics and Ecology of Animals (ISEA) RAS,630091, Novosibirsk, 11 Frunze St., e-mail: serbina_elena_an@mail.ru
2Institute of Experimental Veterinary of Siberia and the Far East, Russian Academy of Agricultural Sciences, 630501, Novosibirsk region, Krasnoobsk, e-mail: olga-bonina@mail.ru
Abstract
Objective of research: to perform the analysis of dynamics of bird notocotylidosis foci in the ecosystem of Lake Chany in Western Siberia in the last 80 years.
Materials and methods: Helminthological examinations of snails of the family Bithyniidae and birds were conducted in the basin of Lake Chany in 1996–2013. The intestines of 172 birds belonging to 17 species were examined using the method of incomplete helminthological autopsy.
The collection of snails of the family Bithyniidae was carried out manually in the summer season. All together 9 000 examples of snails belonging to Bithynia tentaculata and B. troscheli were collected.
The infestation rate for cercariae in the snails was detected by the compressor method with the following calculation of extensity and intensity of infection and the index of abundance.
Results and discussion: Marites of trematodes of the family Notocotylidae were registered in 7 of 17 species. Different rate of infestation by the family Notocotylidae of various bird species was determined.
The extensity of infection was in baldicoot - 70,5 %, mallard - 57,1, garganey - 42,8, red headed duck - 54,5 % by the intensity of infection 35,6; 8,0; 19,3 and 5,5 examples, respectively.
During scientific investigation about birds in the area of Lake Chany in 1934–1938 notocotylides were found in 15 of 90 bird species. The analysis of dynamics of bird notocotylidosis in the ecosystem of Lake Chany (Western Siberia) in the last 80 years revealed that the bird infestation had increased from 23 % in the 30s of the last century up to 31 % in the 70s, and up to
60 % in our today's research. In the last 80 years 22 bird species served as primary hosts.
The detection of marites of the family Notocotylidae by different scientists in all the years of research and the annual presence of parthenitas in snails of the
family Bithyniidae indicates on the constant focus of notocotylidosis in the ecosystem of Lake Chany. The infestation of semi-aquatic birds has been increased more than twice in the last years.
Keywords: Notocotylidae, Bithynia tentaculata, B. troscheli, semi-aquatic birds, Lake Chany, Western Siberia.
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© 2015 The Author(s). Published by All-Russian Scientific Research Institute of Fundamental and Applied Parasitology of Animals and Plants named after K.I. Skryabin.
This is an open access article under the Agreement of 02.07.2014 (Russian Science Citation Index (RSCI) and the Agreement of 12.06.2014 (CABI.org / Human Sciences section).