Поширення трематод родини heterophyidae у бичкових риб (Gobiidae) в лиманних водах та акваторії чорного моря
Abstract
DISTRIBUTION OF TREMATODES OF THE FAMILY HETEROPHYIDAE
IN GOBIIS FISH (GOBIIDAE) IN THE ESTUARIES AND WATERS
OF THE BLACK SEA
S. L. Goncharov, N. M. Soroka, T. V. Mazur
Abstract. In the article data are given regarding the distribution of the Nikolaev and Odessa regions in the Dnipro-Bug estuary and the Black Sea, the trematodeous parasitic disease of fish – cryptocotylosis. The research was conducted in the period 2015–2016. It has been established that in the territory of the Nykolayiv and Odessa regions two types of explored trematodes circulate in natural reservoirs: Cryptocotyle cancavum Crepli, 1825 and Cryptocotyle jejuna Nicoll, 1907. The latter species was not previously recorded in the indicated area of the territory of the south of Ukraine. Infection with metacercariae of the genus Cryptocotyle of different degree of fish was determined in representatives of Gobiidae: Mesogobius batrachocephalus Pallas, 1814, Neogobius melanostomum Pallas, 1814, Neogobius fluviatialis Pallas, 1814. The most affected were N. melanostomum, the prevalens of invasion was 59.2 %. Less invasive were N. fluviatialis and M. batrachocephalus. The prevalens of invasion in them was 30.4 and 17 %, respectively. The intensity of the invasion was maximal in N. melanostomum – 211 specimens, and less in N. fluviatialis and M. batrachocephalus – 124 and 89 specimens. respectively. The greatest distribution of cryptocotylosis was noted in the Dnipro-Bug estuary section (Cape Adzhigol of Nykolayiv region). To a lesser extent, it was noted on the Black Sea areas of the Nikolaev and Odessa regions. The average prevalens of invasion was 31.4%.
Keywords: distribution, C. jejuna, C. cancavum, fish, intensity of invasion, Black Sea, prevalens of invasion, Dnieper-Bug estuary, Nykolaiv and Odessa regionsReferences
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